/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/standard_two_index_03.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:18,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:18,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:18,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:18,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:18,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:18,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:18,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:18,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:18,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:18,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:18,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:18,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:18,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:18,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:18,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:18,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:18,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:18,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:18,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:18,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:18,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:18,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:18,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:18,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:35:18,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:18,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:18,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:18,364 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 20:35:18,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:18,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:18,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:18,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:18,403 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:18,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:18,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:18,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:18,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:18,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:18,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:18,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:18,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:18,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:18,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:18,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:18,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:18,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:18,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:18,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:18,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:18,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:18,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:18,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:18,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:18,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:18,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:18,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:18,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:18,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:18,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:18,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:18,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:18,703 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:18,704 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:18,705 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-23 20:35:18,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36acf01bb/144bd16ccc2e4c9ca38084de59ba967a/FLAGec36b86bb [2019-11-23 20:35:19,193 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:19,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_03.i [2019-11-23 20:35:19,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36acf01bb/144bd16ccc2e4c9ca38084de59ba967a/FLAGec36b86bb [2019-11-23 20:35:19,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36acf01bb/144bd16ccc2e4c9ca38084de59ba967a [2019-11-23 20:35:19,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:19,571 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:19,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:19,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:19,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:19,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7628aad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19, skipping insertion in model container [2019-11-23 20:35:19,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:19,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:19,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:19,796 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:19,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:19,840 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:19,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19 WrapperNode [2019-11-23 20:35:19,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:19,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:19,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:19,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:19,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:19,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:19,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:19,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:19,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (1/1) ... [2019-11-23 20:35:19,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:19,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:19,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:19,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:19,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (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 20:35:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:20,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:20,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:20,281 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:20,281 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:20,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:20 BoogieIcfgContainer [2019-11-23 20:35:20,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:20,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:20,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:20,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:20,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:19" (1/3) ... [2019-11-23 20:35:20,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6250ecfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:20, skipping insertion in model container [2019-11-23 20:35:20,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:19" (2/3) ... [2019-11-23 20:35:20,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6250ecfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:20, skipping insertion in model container [2019-11-23 20:35:20,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:20" (3/3) ... [2019-11-23 20:35:20,311 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2019-11-23 20:35:20,336 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:20,343 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:20,355 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:20,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:20,380 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:20,380 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:20,380 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:20,380 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:20,380 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:20,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:20,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:35:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:35:20,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,410 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:35:20,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18874109] [2019-11-23 20:35:20,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,557 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 20:35:20,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18874109] [2019-11-23 20:35:20,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:20,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:20,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581677028] [2019-11-23 20:35:20,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:20,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:20,577 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:35:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,648 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:35:20,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:20,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:35:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,659 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:35:20,659 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:35:20,662 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 20:35:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:35:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:35:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:35:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:35:20,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:35:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,695 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:35:20,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:35:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:20,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,696 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,697 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,698 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:35:20,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643516601] [2019-11-23 20:35:20,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,745 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 20:35:20,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643516601] [2019-11-23 20:35:20,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:20,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:20,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521506617] [2019-11-23 20:35:20,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:20,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:20,749 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:35:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,789 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:35:20,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:20,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:35:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,791 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:35:20,791 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:20,792 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 20:35:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:35:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:35:20,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:35:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,797 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:35:20,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:35:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:20,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,798 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:35:20,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639849183] [2019-11-23 20:35:20,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,883 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 20:35:20,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639849183] [2019-11-23 20:35:20,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303822926] [2019-11-23 20:35:20,884 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 20:35:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:20,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:20,996 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 20:35:20,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:20,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:35:20,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940363532] [2019-11-23 20:35:20,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:20,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:20,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:20,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:20,999 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:35:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:21,079 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:35:21,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:21,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:35:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:21,081 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:35:21,082 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:21,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:35:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:35:21,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:35:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:21,094 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:35:21,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:35:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:21,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:21,096 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:21,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:35:21,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:21,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772683008] [2019-11-23 20:35:21,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:21,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772683008] [2019-11-23 20:35:21,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731383624] [2019-11-23 20:35:21,381 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 20:35:21,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:21,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:21,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:21,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:21,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:21,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:35:21,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871618648] [2019-11-23 20:35:21,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:21,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:21,489 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:35:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:21,575 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:35:21,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:21,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:35:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:21,577 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:35:21,577 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:35:21,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:35:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:35:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:35:21,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:35:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:21,584 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:35:21,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:35:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:35:21,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:21,586 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:21,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:21,790 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:35:21,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:21,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395478973] [2019-11-23 20:35:21,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:21,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395478973] [2019-11-23 20:35:21,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146639397] [2019-11-23 20:35:21,908 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 20:35:21,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:21,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:21,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:21,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:21,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:21,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:21,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649569261] [2019-11-23 20:35:21,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:21,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:22,000 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:35:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:22,073 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:35:22,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:22,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:35:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:22,075 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:35:22,075 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:35:22,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:35:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:35:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:35:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:35:22,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:35:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:22,085 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:35:22,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:35:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:22,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:22,086 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:22,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:22,299 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:35:22,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:22,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175285909] [2019-11-23 20:35:22,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:22,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175285909] [2019-11-23 20:35:22,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018040158] [2019-11-23 20:35:22,401 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 20:35:22,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:22,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:22,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:22,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:22,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:22,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2019-11-23 20:35:22,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969537586] [2019-11-23 20:35:22,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:22,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:22,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:22,521 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 13 states. [2019-11-23 20:35:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:22,626 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-23 20:35:22,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:22,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-11-23 20:35:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:22,628 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:35:22,628 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:35:22,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:35:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2019-11-23 20:35:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:35:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:35:22,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-11-23 20:35:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:22,636 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:35:22,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:35:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:35:22,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:22,637 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:22,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:22,841 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:22,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1232303186, now seen corresponding path program 5 times [2019-11-23 20:35:22,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:22,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478551832] [2019-11-23 20:35:22,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:22,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478551832] [2019-11-23 20:35:22,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89245262] [2019-11-23 20:35:22,961 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 20:35:23,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:35:23,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:23,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:35:23,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:23,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:23,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 16 [2019-11-23 20:35:23,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862619735] [2019-11-23 20:35:23,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:23,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:23,284 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2019-11-23 20:35:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:23,421 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2019-11-23 20:35:23,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:23,423 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-11-23 20:35:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:23,424 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:35:23,424 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:35:23,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:35:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 30. [2019-11-23 20:35:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:35:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:35:23,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2019-11-23 20:35:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:23,438 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:35:23,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:35:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:35:23,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:23,440 INFO L410 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:23,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:23,652 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash 547139987, now seen corresponding path program 6 times [2019-11-23 20:35:23,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:23,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164850487] [2019-11-23 20:35:23,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:23,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164850487] [2019-11-23 20:35:23,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565640575] [2019-11-23 20:35:23,796 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 20:35:24,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:24,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:24,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:24,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:24,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:24,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:24,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826297068] [2019-11-23 20:35:24,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:24,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:24,102 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2019-11-23 20:35:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,207 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2019-11-23 20:35:24,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:24,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-23 20:35:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,211 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:35:24,211 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:35:24,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:35:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 31. [2019-11-23 20:35:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:35:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-23 20:35:24,218 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2019-11-23 20:35:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,219 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-23 20:35:24,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-23 20:35:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:24,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,220 INFO L410 BasicCegarLoop]: trace histogram [13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:24,431 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash -167083433, now seen corresponding path program 7 times [2019-11-23 20:35:24,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579627393] [2019-11-23 20:35:24,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:24,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579627393] [2019-11-23 20:35:24,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847997029] [2019-11-23 20:35:24,593 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 20:35:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:35:24,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:24,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:24,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 20 [2019-11-23 20:35:24,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928737382] [2019-11-23 20:35:24,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:35:24,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:24,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:35:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:24,742 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 20 states. [2019-11-23 20:35:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,869 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2019-11-23 20:35:24,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:35:24,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2019-11-23 20:35:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,870 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:35:24,870 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:35:24,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:35:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 36. [2019-11-23 20:35:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:35:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:35:24,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2019-11-23 20:35:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,877 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:35:24,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:35:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:35:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:35:24,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,878 INFO L410 BasicCegarLoop]: trace histogram [17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,082 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1464073043, now seen corresponding path program 8 times [2019-11-23 20:35:25,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749456824] [2019-11-23 20:35:25,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:25,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749456824] [2019-11-23 20:35:25,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490731260] [2019-11-23 20:35:25,187 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 20:35:25,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:25,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:25,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:25,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 24 [2019-11-23 20:35:25,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303478760] [2019-11-23 20:35:25,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:25,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:25,369 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 24 states. [2019-11-23 20:35:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,527 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2019-11-23 20:35:25,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:25,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2019-11-23 20:35:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,528 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:35:25,529 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:35:25,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:35:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 41. [2019-11-23 20:35:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:35:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-23 20:35:25,540 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2019-11-23 20:35:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,540 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-23 20:35:25,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-23 20:35:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:35:25,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,542 INFO L410 BasicCegarLoop]: trace histogram [21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,745 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1574172841, now seen corresponding path program 9 times [2019-11-23 20:35:25,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126815778] [2019-11-23 20:35:25,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:35:25,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126815778] [2019-11-23 20:35:25,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265729846] [2019-11-23 20:35:25,900 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 20:35:26,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:26,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:35:26,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:26,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977004278] [2019-11-23 20:35:26,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:26,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:26,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:26,663 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2019-11-23 20:35:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:26,746 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2019-11-23 20:35:26,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:26,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-23 20:35:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:26,748 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:35:26,748 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:35:26,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:35:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 42. [2019-11-23 20:35:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:35:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:35:26,754 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2019-11-23 20:35:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:26,755 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:35:26,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:35:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:35:26,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:26,756 INFO L410 BasicCegarLoop]: trace histogram [21, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:26,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,964 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1503271661, now seen corresponding path program 10 times [2019-11-23 20:35:26,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:26,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693204547] [2019-11-23 20:35:26,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:35:27,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693204547] [2019-11-23 20:35:27,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764042719] [2019-11-23 20:35:27,104 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 20:35:27,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:27,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:27,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:35:27,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:27,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:27,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24] total 29 [2019-11-23 20:35:27,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289514806] [2019-11-23 20:35:27,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:35:27,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:35:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:27,337 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 29 states. [2019-11-23 20:35:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:27,488 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2019-11-23 20:35:27,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:35:27,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2019-11-23 20:35:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:27,491 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:35:27,491 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:35:27,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:35:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:35:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 48. [2019-11-23 20:35:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:35:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:35:27,498 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2019-11-23 20:35:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:27,498 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:35:27,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:35:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:35:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:35:27,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:27,499 INFO L410 BasicCegarLoop]: trace histogram [26, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:27,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:27,707 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1929320338, now seen corresponding path program 11 times [2019-11-23 20:35:27,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:27,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105197478] [2019-11-23 20:35:27,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:35:27,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105197478] [2019-11-23 20:35:27,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32581392] [2019-11-23 20:35:27,875 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 20:35:42,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:35:42,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:42,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:35:42,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:35:42,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:42,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29] total 33 [2019-11-23 20:35:42,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876092277] [2019-11-23 20:35:42,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:35:42,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:35:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:42,454 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 33 states. [2019-11-23 20:35:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:42,663 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 20:35:42,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:35:42,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2019-11-23 20:35:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:42,665 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:35:42,665 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:35:42,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:35:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2019-11-23 20:35:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:35:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-23 20:35:42,674 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 46 [2019-11-23 20:35:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:42,674 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-23 20:35:42,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:35:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-23 20:35:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:35:42,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:42,675 INFO L410 BasicCegarLoop]: trace histogram [30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:42,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,888 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:42,888 INFO L82 PathProgramCache]: Analyzing trace with hash -815246600, now seen corresponding path program 12 times [2019-11-23 20:35:42,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:42,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878453085] [2019-11-23 20:35:42,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:35:43,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878453085] [2019-11-23 20:35:43,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314498257] [2019-11-23 20:35:43,057 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 20:35:56,541 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:35:56,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:56,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:35:56,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:35:56,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:56,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:35:56,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288351007] [2019-11-23 20:35:56,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:56,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:56,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:56,582 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2019-11-23 20:35:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:56,693 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2019-11-23 20:35:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:56,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-23 20:35:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:56,694 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:35:56,695 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:35:56,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:35:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 54. [2019-11-23 20:35:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:35:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:35:56,700 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2019-11-23 20:35:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:56,701 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:35:56,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:35:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:35:56,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:56,702 INFO L410 BasicCegarLoop]: trace histogram [30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:56,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:56,903 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash 548605330, now seen corresponding path program 13 times [2019-11-23 20:35:56,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:56,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766034359] [2019-11-23 20:35:56,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:35:57,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766034359] [2019-11-23 20:35:57,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258111413] [2019-11-23 20:35:57,061 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 20:35:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:57,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:35:57,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:57,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:57,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 33] total 38 [2019-11-23 20:35:57,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909007798] [2019-11-23 20:35:57,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:35:57,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:35:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:35:57,339 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 38 states. [2019-11-23 20:35:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:57,538 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2019-11-23 20:35:57,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:35:57,538 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 52 [2019-11-23 20:35:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:57,539 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:35:57,539 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:35:57,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:35:57,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:35:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2019-11-23 20:35:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:35:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:35:57,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 52 [2019-11-23 20:35:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:57,546 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:35:57,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:35:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:35:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 20:35:57,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:57,547 INFO L410 BasicCegarLoop]: trace histogram [35, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:57,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:57,752 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:57,752 INFO L82 PathProgramCache]: Analyzing trace with hash -607601037, now seen corresponding path program 14 times [2019-11-23 20:35:57,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:57,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894770846] [2019-11-23 20:35:57,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-23 20:35:57,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894770846] [2019-11-23 20:35:57,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890095545] [2019-11-23 20:35:57,972 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 20:35:58,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:58,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:58,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:35:58,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:58,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:58,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 38] total 42 [2019-11-23 20:35:58,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383685518] [2019-11-23 20:35:58,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:35:58,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:35:58,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=860, Invalid=862, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:35:58,377 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 42 states. [2019-11-23 20:35:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:58,618 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2019-11-23 20:35:58,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:35:58,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2019-11-23 20:35:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:58,620 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:35:58,621 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:35:58,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=862, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:35:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:35:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 65. [2019-11-23 20:35:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:35:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-23 20:35:58,628 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2019-11-23 20:35:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:58,628 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-23 20:35:58,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:35:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-23 20:35:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:35:58,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:58,630 INFO L410 BasicCegarLoop]: trace histogram [39, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:58,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:58,836 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 848783415, now seen corresponding path program 15 times [2019-11-23 20:35:58,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:58,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582811401] [2019-11-23 20:35:58,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-11-23 20:35:59,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582811401] [2019-11-23 20:35:59,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610379897] [2019-11-23 20:35:59,059 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 20:36:06,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:36:06,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:06,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:36:06,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-11-23 20:36:06,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:06,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:36:06,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880059157] [2019-11-23 20:36:06,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:36:06,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:06,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:36:06,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:06,330 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2019-11-23 20:36:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:06,462 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2019-11-23 20:36:06,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:36:06,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-11-23 20:36:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:06,463 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:36:06,463 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:36:06,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:36:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 66. [2019-11-23 20:36:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:36:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:36:06,470 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2019-11-23 20:36:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:06,470 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:36:06,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:36:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:36:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:36:06,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:06,475 INFO L410 BasicCegarLoop]: trace histogram [39, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:06,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:06,676 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash 593928243, now seen corresponding path program 16 times [2019-11-23 20:36:06,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:06,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581046276] [2019-11-23 20:36:06,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-11-23 20:36:06,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581046276] [2019-11-23 20:36:06,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267095801] [2019-11-23 20:36:06,921 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 20:36:07,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:07,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:07,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:36:07,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:36:07,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:07,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 42] total 47 [2019-11-23 20:36:07,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325143296] [2019-11-23 20:36:07,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:36:07,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:36:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:36:07,292 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 47 states. [2019-11-23 20:36:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:07,591 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2019-11-23 20:36:07,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:36:07,591 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 64 [2019-11-23 20:36:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:07,593 INFO L225 Difference]: With dead ends: 181 [2019-11-23 20:36:07,593 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 20:36:07,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1080, Invalid=1082, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:36:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 20:36:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 72. [2019-11-23 20:36:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:36:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-23 20:36:07,599 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 64 [2019-11-23 20:36:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:07,599 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-23 20:36:07,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:36:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-23 20:36:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:36:07,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:07,600 INFO L410 BasicCegarLoop]: trace histogram [44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:07,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:07,806 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:07,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 718667634, now seen corresponding path program 17 times [2019-11-23 20:36:07,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:07,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273968227] [2019-11-23 20:36:07,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-11-23 20:36:08,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273968227] [2019-11-23 20:36:08,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087895079] [2019-11-23 20:36:08,075 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