/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:53,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:53,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:53,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:15:53,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:15:53,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:15:53,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:15:53,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:15:53,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:15:53,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:15:53,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:15:53,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:15:53,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:15:53,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:15:53,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:15:53,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:15:53,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:15:53,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:15:53,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:15:53,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:15:53,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:15:53,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:15:53,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:15:53,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:15:53,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:15:53,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:15:53,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:15:53,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:15:53,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:15:53,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:15:53,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:15:53,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:15:53,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:15:53,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:15:53,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:15:53,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:15:53,336 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 22:15:53,350 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:53,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:53,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:53,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:53,352 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:53,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:53,352 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:53,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:53,353 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:53,354 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:53,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:53,354 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:53,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:53,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:53,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:53,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:53,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:53,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:53,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:53,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:53,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:53,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:53,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:53,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:53,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:53,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:53,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:53,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:53,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:53,719 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:53,720 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2019-11-23 22:15:53,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438441ca/105164b885b14e68bced6da93a30bf67/FLAGca0be863c [2019-11-23 22:15:54,196 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:54,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2019-11-23 22:15:54,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438441ca/105164b885b14e68bced6da93a30bf67/FLAGca0be863c [2019-11-23 22:15:54,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438441ca/105164b885b14e68bced6da93a30bf67 [2019-11-23 22:15:54,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:54,637 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:54,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:54,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:54,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:54,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad61d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54, skipping insertion in model container [2019-11-23 22:15:54,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:54,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:54,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:54,867 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:54,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:54,998 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:54,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54 WrapperNode [2019-11-23 22:15:54,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:54,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:54,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:54,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:55,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:55,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:55,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:55,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:55,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:55,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:55,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:55,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:55,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:55,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (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 22:15:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:15:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:55,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:55,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:15:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:15:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:15:55,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:15:55,499 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:55,499 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 22:15:55,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:55 BoogieIcfgContainer [2019-11-23 22:15:55,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:55,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:55,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:55,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:55,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:54" (1/3) ... [2019-11-23 22:15:55,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cdf8a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:55, skipping insertion in model container [2019-11-23 22:15:55,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (2/3) ... [2019-11-23 22:15:55,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cdf8a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:55, skipping insertion in model container [2019-11-23 22:15:55,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:55" (3/3) ... [2019-11-23 22:15:55,522 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2019-11-23 22:15:55,531 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:55,537 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:55,545 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:55,565 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:55,566 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:55,566 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:55,566 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:55,566 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:55,566 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:55,566 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:55,566 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-23 22:15:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:15:55,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,586 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,586 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2019-11-23 22:15:55,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499813798] [2019-11-23 22:15:55,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,737 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 22:15:55,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499813798] [2019-11-23 22:15:55,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:55,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:55,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19233395] [2019-11-23 22:15:55,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:15:55,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:55,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:15:55,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:55,762 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-11-23 22:15:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:55,782 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2019-11-23 22:15:55,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:15:55,784 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-23 22:15:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:55,794 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:15:55,795 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:15:55,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:15:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:15:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:15:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 22:15:55,837 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2019-11-23 22:15:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:55,838 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 22:15:55,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:15:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 22:15:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:15:55,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,839 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,840 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2019-11-23 22:15:55,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201435608] [2019-11-23 22:15:55,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,948 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 22:15:55,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201435608] [2019-11-23 22:15:55,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:55,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:15:55,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873443930] [2019-11-23 22:15:55,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:15:55,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:15:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:55,955 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 3 states. [2019-11-23 22:15:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:56,033 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-23 22:15:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:15:56,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 22:15:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:56,035 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:15:56,035 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:15:56,036 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 22:15:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:15:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2019-11-23 22:15:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:15:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2019-11-23 22:15:56,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2019-11-23 22:15:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:56,044 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2019-11-23 22:15:56,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:15:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2019-11-23 22:15:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:15:56,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:56,045 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:56,045 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2019-11-23 22:15:56,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:56,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121147129] [2019-11-23 22:15:56,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:56,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121147129] [2019-11-23 22:15:56,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476479270] [2019-11-23 22:15:56,168 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 22:15:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:15:56,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:56,293 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 22:15:56,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:15:56,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2019-11-23 22:15:56,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418136830] [2019-11-23 22:15:56,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:15:56,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:15:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:56,298 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 5 states. [2019-11-23 22:15:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:56,369 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2019-11-23 22:15:56,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:56,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 22:15:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:56,374 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:15:56,375 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:15:56,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:15:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2019-11-23 22:15:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:15:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2019-11-23 22:15:56,390 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2019-11-23 22:15:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:56,391 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2019-11-23 22:15:56,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:15:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2019-11-23 22:15:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:15:56,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:56,393 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:56,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,594 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -35626147, now seen corresponding path program 1 times [2019-11-23 22:15:56,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:56,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629293324] [2019-11-23 22:15:56,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:56,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629293324] [2019-11-23 22:15:56,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603705858] [2019-11-23 22:15:56,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:56,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:56,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:15:56,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-23 22:15:56,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720246558] [2019-11-23 22:15:56,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:56,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:56,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:56,843 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand 4 states. [2019-11-23 22:15:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:56,917 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2019-11-23 22:15:56,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:56,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-23 22:15:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:56,919 INFO L225 Difference]: With dead ends: 96 [2019-11-23 22:15:56,920 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 22:15:56,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 22:15:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2019-11-23 22:15:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:15:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2019-11-23 22:15:56,933 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2019-11-23 22:15:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:56,933 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2019-11-23 22:15:56,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2019-11-23 22:15:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:15:56,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:56,937 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:57,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:57,138 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1865102999, now seen corresponding path program 1 times [2019-11-23 22:15:57,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:57,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997047815] [2019-11-23 22:15:57,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:15:57,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997047815] [2019-11-23 22:15:57,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478301552] [2019-11-23 22:15:57,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:57,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:15:57,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:57,404 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-23 22:15:57,405 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:57,411 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:57,411 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:57,412 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-23 22:15:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:15:57,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:57,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2019-11-23 22:15:57,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660429317] [2019-11-23 22:15:57,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:15:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:15:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:57,434 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand 11 states. [2019-11-23 22:15:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:57,667 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2019-11-23 22:15:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:15:57,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 22:15:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:57,669 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:15:57,669 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 22:15:57,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:15:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 22:15:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 41. [2019-11-23 22:15:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:15:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2019-11-23 22:15:57,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2019-11-23 22:15:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:57,679 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2019-11-23 22:15:57,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:15:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2019-11-23 22:15:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:15:57,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:57,680 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:57,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:57,892 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1872290876, now seen corresponding path program 1 times [2019-11-23 22:15:57,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:57,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679219234] [2019-11-23 22:15:57,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:15:58,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679219234] [2019-11-23 22:15:58,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380355120] [2019-11-23 22:15:58,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:15:58,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:58,178 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-23 22:15:58,179 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:58,181 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:58,182 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:58,182 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-23 22:15:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:15:58,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:58,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2019-11-23 22:15:58,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080205612] [2019-11-23 22:15:58,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:15:58,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:15:58,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:58,207 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 11 states. [2019-11-23 22:15:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:58,509 INFO L93 Difference]: Finished difference Result 137 states and 199 transitions. [2019-11-23 22:15:58,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:15:58,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-11-23 22:15:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:58,514 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:15:58,515 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 22:15:58,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:15:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 22:15:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 59. [2019-11-23 22:15:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:15:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2019-11-23 22:15:58,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 26 [2019-11-23 22:15:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:58,534 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2019-11-23 22:15:58,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:15:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2019-11-23 22:15:58,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:15:58,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:58,538 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:58,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,743 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash 854905675, now seen corresponding path program 1 times [2019-11-23 22:15:58,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:58,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965236682] [2019-11-23 22:15:58,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:15:58,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965236682] [2019-11-23 22:15:58,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145815180] [2019-11-23 22:15:58,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:15:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:58,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:15:58,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:58,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:15:58,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443967112] [2019-11-23 22:15:58,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:15:58,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:15:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:58,953 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 6 states. [2019-11-23 22:15:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:59,084 INFO L93 Difference]: Finished difference Result 236 states and 308 transitions. [2019-11-23 22:15:59,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:59,085 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-23 22:15:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:59,089 INFO L225 Difference]: With dead ends: 236 [2019-11-23 22:15:59,089 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 22:15:59,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 22:15:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 61. [2019-11-23 22:15:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:15:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-11-23 22:15:59,111 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 30 [2019-11-23 22:15:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:59,111 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-11-23 22:15:59,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:15:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-11-23 22:15:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:15:59,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:59,116 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:59,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:59,320 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:59,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1771239629, now seen corresponding path program 2 times [2019-11-23 22:15:59,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:59,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155383327] [2019-11-23 22:15:59,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 22:15:59,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155383327] [2019-11-23 22:15:59,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450388443] [2019-11-23 22:15:59,406 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 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 22:15:59,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:59,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:59,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:15:59,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:59,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:59,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2019-11-23 22:15:59,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115736781] [2019-11-23 22:15:59,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:15:59,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:15:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:59,507 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 9 states. [2019-11-23 22:15:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:59,979 INFO L93 Difference]: Finished difference Result 310 states and 428 transitions. [2019-11-23 22:15:59,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:15:59,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-23 22:15:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:59,983 INFO L225 Difference]: With dead ends: 310 [2019-11-23 22:15:59,983 INFO L226 Difference]: Without dead ends: 264 [2019-11-23 22:15:59,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:15:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-11-23 22:16:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 73. [2019-11-23 22:16:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:16:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-11-23 22:16:00,008 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 32 [2019-11-23 22:16:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:00,010 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-11-23 22:16:00,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:16:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-11-23 22:16:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:16:00,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:00,014 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:00,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:00,218 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash -924087168, now seen corresponding path program 3 times [2019-11-23 22:16:00,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:00,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995454562] [2019-11-23 22:16:00,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 22:16:00,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995454562] [2019-11-23 22:16:00,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8103051] [2019-11-23 22:16:00,344 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 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 22:16:00,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:16:00,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:16:00,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:16:00,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:00,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:00,496 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:16:00,496 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-23 22:16:00,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:00,498 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:16:00,504 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:16:00,505 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:16:00,506 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2019-11-23 22:16:00,506 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:16:00,524 INFO L567 ElimStorePlain]: treesize reduction 13, result has 45.8 percent of original size [2019-11-23 22:16:00,525 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:16:00,525 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:11 [2019-11-23 22:16:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 22:16:00,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:00,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2019-11-23 22:16:00,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417174727] [2019-11-23 22:16:00,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:16:00,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:16:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:16:00,584 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 14 states. [2019-11-23 22:16:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:01,210 INFO L93 Difference]: Finished difference Result 218 states and 297 transitions. [2019-11-23 22:16:01,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:16:01,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-23 22:16:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:01,211 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:16:01,212 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 22:16:01,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:16:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 22:16:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2019-11-23 22:16:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:16:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2019-11-23 22:16:01,224 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 35 [2019-11-23 22:16:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:01,225 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2019-11-23 22:16:01,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:16:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2019-11-23 22:16:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:16:01,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:01,226 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:01,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:01,437 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash 314985988, now seen corresponding path program 1 times [2019-11-23 22:16:01,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:01,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304471941] [2019-11-23 22:16:01,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 22:16:01,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304471941] [2019-11-23 22:16:01,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067368563] [2019-11-23 22:16:01,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:01,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:16:01,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 22:16:01,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:01,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 18 [2019-11-23 22:16:01,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410371187] [2019-11-23 22:16:01,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:16:01,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:16:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:16:01,763 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 18 states. [2019-11-23 22:16:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:04,176 INFO L93 Difference]: Finished difference Result 516 states and 691 transitions. [2019-11-23 22:16:04,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-23 22:16:04,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-11-23 22:16:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:04,181 INFO L225 Difference]: With dead ends: 516 [2019-11-23 22:16:04,181 INFO L226 Difference]: Without dead ends: 444 [2019-11-23 22:16:04,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=397, Invalid=4295, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 22:16:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2019-11-23 22:16:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 249. [2019-11-23 22:16:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-11-23 22:16:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 333 transitions. [2019-11-23 22:16:04,210 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 333 transitions. Word has length 53 [2019-11-23 22:16:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:04,210 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 333 transitions. [2019-11-23 22:16:04,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:16:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 333 transitions. [2019-11-23 22:16:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 22:16:04,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:04,212 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:04,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:04,415 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash 263218137, now seen corresponding path program 2 times [2019-11-23 22:16:04,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:04,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426085145] [2019-11-23 22:16:04,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:16:04,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426085145] [2019-11-23 22:16:04,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864706896] [2019-11-23 22:16:04,551 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 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 22:16:04,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:16:04,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:16:04,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:16:04,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 22:16:04,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:04,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 21 [2019-11-23 22:16:04,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515810772] [2019-11-23 22:16:04,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:16:04,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:16:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:16:04,823 INFO L87 Difference]: Start difference. First operand 249 states and 333 transitions. Second operand 21 states. [2019-11-23 22:16:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:09,085 INFO L93 Difference]: Finished difference Result 935 states and 1265 transitions. [2019-11-23 22:16:09,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-11-23 22:16:09,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2019-11-23 22:16:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:09,090 INFO L225 Difference]: With dead ends: 935 [2019-11-23 22:16:09,091 INFO L226 Difference]: Without dead ends: 700 [2019-11-23 22:16:09,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=565, Invalid=8177, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 22:16:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-23 22:16:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 331. [2019-11-23 22:16:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2019-11-23 22:16:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 443 transitions. [2019-11-23 22:16:09,128 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 443 transitions. Word has length 59 [2019-11-23 22:16:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:09,129 INFO L462 AbstractCegarLoop]: Abstraction has 331 states and 443 transitions. [2019-11-23 22:16:09,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:16:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 443 transitions. [2019-11-23 22:16:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:16:09,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:09,130 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:09,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:09,332 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -949596700, now seen corresponding path program 3 times [2019-11-23 22:16:09,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:09,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106598126] [2019-11-23 22:16:09,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-23 22:16:09,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106598126] [2019-11-23 22:16:09,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325853865] [2019-11-23 22:16:09,442 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 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 22:16:09,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:16:09,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:16:09,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:16:09,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-23 22:16:09,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:09,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:16:09,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214128312] [2019-11-23 22:16:09,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:16:09,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:16:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:16:09,604 INFO L87 Difference]: Start difference. First operand 331 states and 443 transitions. Second operand 7 states. [2019-11-23 22:16:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:09,921 INFO L93 Difference]: Finished difference Result 1794 states and 2420 transitions. [2019-11-23 22:16:09,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:16:09,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2019-11-23 22:16:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:09,929 INFO L225 Difference]: With dead ends: 1794 [2019-11-23 22:16:09,929 INFO L226 Difference]: Without dead ends: 1472 [2019-11-23 22:16:09,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:16:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2019-11-23 22:16:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 333. [2019-11-23 22:16:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2019-11-23 22:16:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 445 transitions. [2019-11-23 22:16:09,977 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 445 transitions. Word has length 65 [2019-11-23 22:16:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:09,977 INFO L462 AbstractCegarLoop]: Abstraction has 333 states and 445 transitions. [2019-11-23 22:16:09,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:16:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 445 transitions. [2019-11-23 22:16:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:16:09,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:09,980 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:10,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:10,186 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash -951539422, now seen corresponding path program 4 times [2019-11-23 22:16:10,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:10,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338049277] [2019-11-23 22:16:10,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 22:16:10,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338049277] [2019-11-23 22:16:10,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542692081] [2019-11-23 22:16:10,324 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 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 22:16:10,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:16:10,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:16:10,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:16:10,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:16:10,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:10,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 24 [2019-11-23 22:16:10,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660856441] [2019-11-23 22:16:10,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:16:10,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:10,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:16:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:16:10,658 INFO L87 Difference]: Start difference. First operand 333 states and 445 transitions. Second operand 24 states. [2019-11-23 22:16:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:17,745 INFO L93 Difference]: Finished difference Result 1350 states and 1830 transitions. [2019-11-23 22:16:17,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2019-11-23 22:16:17,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2019-11-23 22:16:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:17,752 INFO L225 Difference]: With dead ends: 1350 [2019-11-23 22:16:17,752 INFO L226 Difference]: Without dead ends: 1033 [2019-11-23 22:16:17,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=763, Invalid=14243, Unknown=0, NotChecked=0, Total=15006 [2019-11-23 22:16:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2019-11-23 22:16:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 427. [2019-11-23 22:16:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-23 22:16:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 571 transitions. [2019-11-23 22:16:17,801 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 571 transitions. Word has length 67 [2019-11-23 22:16:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:17,801 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 571 transitions. [2019-11-23 22:16:17,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:16:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 571 transitions. [2019-11-23 22:16:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:16:17,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:17,803 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:18,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:18,006 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash -109845321, now seen corresponding path program 5 times [2019-11-23 22:16:18,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:18,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473668] [2019-11-23 22:16:18,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 22:16:18,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473668] [2019-11-23 22:16:18,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637622952] [2019-11-23 22:16:18,179 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 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