/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:44:25,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:44:25,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:44:25,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:44:25,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:44:25,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:44:25,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:44:25,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:44:25,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:44:25,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:44:25,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:44:25,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:44:25,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:44:25,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:44:25,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:44:25,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:44:25,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:44:25,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:44:25,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:44:25,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:44:25,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:44:25,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:44:25,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:44:25,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:44:25,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:44:25,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:44:25,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:44:25,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:44:25,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:44:25,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:44:25,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:44:25,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:44:25,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:44:25,358 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:44:25,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:44:25,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:44:25,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:44:25,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:44:25,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:44:25,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:44:25,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:44:25,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:44:25,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:44:25,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:44:25,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:44:25,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:44:25,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:25,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:44:25,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:44:25,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:44:25,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:44:25,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:44:25,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:44:25,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:44:25,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:44:25,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:44:25,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:44:25,650 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:44:25,650 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:44:25,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-23 20:44:25,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6cd9488/b8d4084427e34511bca447fba44e8bc6/FLAG0651879ec [2019-11-23 20:44:26,179 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:44:26,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-11-23 20:44:26,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6cd9488/b8d4084427e34511bca447fba44e8bc6/FLAG0651879ec [2019-11-23 20:44:26,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6cd9488/b8d4084427e34511bca447fba44e8bc6 [2019-11-23 20:44:26,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:44:26,522 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:44:26,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:26,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:44:26,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:44:26,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6581bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26, skipping insertion in model container [2019-11-23 20:44:26,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:44:26,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:44:26,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:26,724 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:44:26,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:26,771 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:44:26,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26 WrapperNode [2019-11-23 20:44:26,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:26,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:26,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:44:26,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:44:26,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:26,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:44:26,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:44:26,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:44:26,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... [2019-11-23 20:44:26,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:44:26,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:44:26,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:44:26,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:44:26,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:26,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:44:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:44:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:44:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:44:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:44:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:44:27,312 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:44:27,312 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:44:27,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:27 BoogieIcfgContainer [2019-11-23 20:44:27,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:44:27,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:44:27,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:44:27,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:44:27,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:44:26" (1/3) ... [2019-11-23 20:44:27,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20981c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:27, skipping insertion in model container [2019-11-23 20:44:27,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:26" (2/3) ... [2019-11-23 20:44:27,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20981c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:27, skipping insertion in model container [2019-11-23 20:44:27,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:27" (3/3) ... [2019-11-23 20:44:27,329 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-11-23 20:44:27,338 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:44:27,345 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:44:27,355 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:44:27,376 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:44:27,377 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:44:27,377 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:44:27,377 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:44:27,377 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:44:27,377 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:44:27,377 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:44:27,378 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:44:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:44:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:44:27,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:27,398 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:27,398 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2019-11-23 20:44:27,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:27,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196848108] [2019-11-23 20:44:27,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:27,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196848108] [2019-11-23 20:44:27,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:27,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:44:27,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372887020] [2019-11-23 20:44:27,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:44:27,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:44:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:27,565 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-23 20:44:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:27,586 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-11-23 20:44:27,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:44:27,588 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:44:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:27,599 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:44:27,599 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:44:27,603 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 20:44:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:44:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 20:44:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:44:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:44:27,647 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2019-11-23 20:44:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:27,647 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:44:27,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:44:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:44:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:44:27,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:27,649 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:27,649 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:27,650 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2019-11-23 20:44:27,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:27,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904898129] [2019-11-23 20:44:27,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:27,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904898129] [2019-11-23 20:44:27,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:27,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:44:27,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628025440] [2019-11-23 20:44:27,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:44:27,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:44:27,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:27,752 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2019-11-23 20:44:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:27,875 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2019-11-23 20:44:27,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:44:27,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:44:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:27,877 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:44:27,877 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:44:27,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:44:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 20:44:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:44:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:44:27,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2019-11-23 20:44:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:27,885 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:44:27,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:44:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:44:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:44:27,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:27,886 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:27,886 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2019-11-23 20:44:27,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:27,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926101183] [2019-11-23 20:44:27,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:27,992 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 20:44:27,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926101183] [2019-11-23 20:44:27,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367900511] [2019-11-23 20:44:27,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:28,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:28,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:28,130 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 20:44:28,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:28,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:44:28,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471994215] [2019-11-23 20:44:28,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:44:28,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:44:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:28,133 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2019-11-23 20:44:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:28,346 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2019-11-23 20:44:28,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:44:28,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:44:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:28,350 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:44:28,350 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:44:28,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:44:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-11-23 20:44:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:44:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:44:28,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2019-11-23 20:44:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:28,363 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:44:28,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:44:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:44:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:44:28,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:28,365 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:28,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:28,570 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1508541617, now seen corresponding path program 1 times [2019-11-23 20:44:28,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:28,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008495436] [2019-11-23 20:44:28,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:44:28,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008495436] [2019-11-23 20:44:28,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887426191] [2019-11-23 20:44:28,824 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 20:44:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:28,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:44:28,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 20:44:29,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:29,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-11-23 20:44:29,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693933086] [2019-11-23 20:44:29,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:44:29,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:44:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:29,056 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 15 states. [2019-11-23 20:44:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:29,945 INFO L93 Difference]: Finished difference Result 198 states and 271 transitions. [2019-11-23 20:44:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:44:29,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-11-23 20:44:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:29,947 INFO L225 Difference]: With dead ends: 198 [2019-11-23 20:44:29,948 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:44:29,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:44:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:44:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2019-11-23 20:44:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:44:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2019-11-23 20:44:29,969 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 43 [2019-11-23 20:44:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:29,969 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2019-11-23 20:44:29,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:44:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2019-11-23 20:44:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:44:29,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:29,973 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:30,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:30,182 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138155, now seen corresponding path program 2 times [2019-11-23 20:44:30,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:30,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670407430] [2019-11-23 20:44:30,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:44:30,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670407430] [2019-11-23 20:44:30,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319978637] [2019-11-23 20:44:30,585 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:30,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:30,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:30,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:44:30,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-11-23 20:44:30,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:30,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-11-23 20:44:30,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705668716] [2019-11-23 20:44:30,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:44:30,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:44:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:30,898 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand 26 states. [2019-11-23 20:44:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:32,712 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2019-11-23 20:44:32,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:44:32,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2019-11-23 20:44:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:32,717 INFO L225 Difference]: With dead ends: 470 [2019-11-23 20:44:32,717 INFO L226 Difference]: Without dead ends: 353 [2019-11-23 20:44:32,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:44:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-11-23 20:44:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2019-11-23 20:44:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-11-23 20:44:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 325 transitions. [2019-11-23 20:44:32,751 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 325 transitions. Word has length 75 [2019-11-23 20:44:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:32,752 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 325 transitions. [2019-11-23 20:44:32,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:44:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 325 transitions. [2019-11-23 20:44:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:32,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:32,755 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:32,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:32,958 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1528764808, now seen corresponding path program 3 times [2019-11-23 20:44:32,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:32,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569774643] [2019-11-23 20:44:32,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 20:44:33,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569774643] [2019-11-23 20:44:33,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844148626] [2019-11-23 20:44:33,509 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:33,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:44:33,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:33,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:33,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2019-11-23 20:44:33,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:33,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-11-23 20:44:33,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571119687] [2019-11-23 20:44:33,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:33,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:44:33,636 INFO L87 Difference]: Start difference. First operand 248 states and 325 transitions. Second operand 4 states. [2019-11-23 20:44:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:33,689 INFO L93 Difference]: Finished difference Result 393 states and 519 transitions. [2019-11-23 20:44:33,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:33,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-23 20:44:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:33,691 INFO L225 Difference]: With dead ends: 393 [2019-11-23 20:44:33,691 INFO L226 Difference]: Without dead ends: 242 [2019-11-23 20:44:33,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:44:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-11-23 20:44:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2019-11-23 20:44:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-23 20:44:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 315 transitions. [2019-11-23 20:44:33,715 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 315 transitions. Word has length 115 [2019-11-23 20:44:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:33,716 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 315 transitions. [2019-11-23 20:44:33,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 315 transitions. [2019-11-23 20:44:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:33,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:33,719 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:33,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:33,923 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1868809210, now seen corresponding path program 4 times [2019-11-23 20:44:33,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:33,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733581858] [2019-11-23 20:44:33,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-11-23 20:44:34,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733581858] [2019-11-23 20:44:34,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814316982] [2019-11-23 20:44:34,321 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:34,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:34,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:34,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:34,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2019-11-23 20:44:34,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:34,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [24] total 26 [2019-11-23 20:44:34,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137123861] [2019-11-23 20:44:34,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:34,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:34,451 INFO L87 Difference]: Start difference. First operand 242 states and 315 transitions. Second operand 4 states. [2019-11-23 20:44:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:34,533 INFO L93 Difference]: Finished difference Result 391 states and 503 transitions. [2019-11-23 20:44:34,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:34,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-23 20:44:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:34,536 INFO L225 Difference]: With dead ends: 391 [2019-11-23 20:44:34,536 INFO L226 Difference]: Without dead ends: 228 [2019-11-23 20:44:34,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-11-23 20:44:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 188. [2019-11-23 20:44:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:44:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2019-11-23 20:44:34,559 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 115 [2019-11-23 20:44:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:34,559 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2019-11-23 20:44:34,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2019-11-23 20:44:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:34,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:34,562 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:34,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:34,774 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1874124550, now seen corresponding path program 5 times [2019-11-23 20:44:34,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:34,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531928293] [2019-11-23 20:44:34,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-11-23 20:44:34,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531928293] [2019-11-23 20:44:34,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779664804] [2019-11-23 20:44:34,996 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 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