/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/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:13:57,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:13:57,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:13:57,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:13:57,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:13:57,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:13:57,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:13:57,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:13:57,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:13:57,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:13:57,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:13:57,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:13:57,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:13:57,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:13:57,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:13:57,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:13:57,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:13:57,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:13:57,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:13:57,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:13:57,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:13:57,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:13:57,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:13:57,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:13:57,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:13:57,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:13:57,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:13:57,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:13:57,328 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 22:13:57,360 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:13:57,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:13:57,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:13:57,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:13:57,363 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:13:57,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:13:57,363 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:13:57,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:13:57,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:13:57,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:13:57,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:13:57,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:13:57,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:13:57,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:13:57,370 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:13:57,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:13:57,370 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:13:57,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:13:57,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:13:57,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:13:57,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:13:57,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:13:57,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:13:57,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:13:57,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:13:57,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:13:57,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:13:57,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:13:57,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:13:57,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:13:57,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:13:57,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:13:57,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:13:57,655 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:13:57,655 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:13:57,656 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-23 22:13:57,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550e1c086/d5b133c47ddb449bb4f93df4001887e1/FLAG062f2a875 [2019-11-23 22:13:58,182 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:13:58,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-23 22:13:58,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550e1c086/d5b133c47ddb449bb4f93df4001887e1/FLAG062f2a875 [2019-11-23 22:13:58,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/550e1c086/d5b133c47ddb449bb4f93df4001887e1 [2019-11-23 22:13:58,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:13:58,625 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:13:58,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:58,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:13:58,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:13:58,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c597767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58, skipping insertion in model container [2019-11-23 22:13:58,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:13:58,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:13:58,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:58,889 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:13:58,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:58,919 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:13:58,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58 WrapperNode [2019-11-23 22:13:58,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:58,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:58,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:13:58,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:13:58,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:59,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:13:59,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:13:59,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:13:59,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:59,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:13:59,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:13:59,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:13:59,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:13:59,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (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 22:13:59,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:13:59,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:13:59,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:13:59,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:13:59,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:13:59,350 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:13:59,350 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 22:13:59,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:59 BoogieIcfgContainer [2019-11-23 22:13:59,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:13:59,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:13:59,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:13:59,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:13:59,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:13:58" (1/3) ... [2019-11-23 22:13:59,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a12b2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:59, skipping insertion in model container [2019-11-23 22:13:59,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (2/3) ... [2019-11-23 22:13:59,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a12b2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:59, skipping insertion in model container [2019-11-23 22:13:59,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:59" (3/3) ... [2019-11-23 22:13:59,359 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-11-23 22:13:59,368 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:13:59,375 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:13:59,386 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:13:59,410 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:13:59,410 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:13:59,411 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:13:59,411 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:13:59,411 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:13:59,411 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:13:59,411 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:13:59,411 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:13:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 22:13:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:13:59,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:59,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:59,442 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 132774875, now seen corresponding path program 1 times [2019-11-23 22:13:59,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:59,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172274365] [2019-11-23 22:13:59,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,629 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 22:13:59,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172274365] [2019-11-23 22:13:59,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:59,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:13:59,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991271484] [2019-11-23 22:13:59,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:13:59,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:59,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:13:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:13:59,654 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2019-11-23 22:13:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:59,672 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:13:59,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:13:59,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:13:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:59,683 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:13:59,683 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:13:59,687 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 22:13:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:13:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:13:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:13:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 22:13:59,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-11-23 22:13:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:59,721 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 22:13:59,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:13:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 22:13:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:13:59,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:59,722 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:59,722 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash -317112588, now seen corresponding path program 1 times [2019-11-23 22:13:59,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:59,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423716778] [2019-11-23 22:13:59,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,842 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 22:13:59,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423716778] [2019-11-23 22:13:59,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:59,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:59,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858590200] [2019-11-23 22:13:59,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:59,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:59,846 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2019-11-23 22:13:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:59,892 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-23 22:13:59,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:59,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 22:13:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:59,894 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:13:59,894 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:13:59,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:13:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:13:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:13:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-23 22:13:59,899 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2019-11-23 22:13:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:59,899 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-23 22:13:59,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-23 22:13:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:13:59,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:59,901 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:59,902 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:59,902 INFO L82 PathProgramCache]: Analyzing trace with hash -317053006, now seen corresponding path program 1 times [2019-11-23 22:13:59,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:59,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729806502] [2019-11-23 22:13:59,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:00,128 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 22:14:00,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729806502] [2019-11-23 22:14:00,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:00,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:14:00,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73603805] [2019-11-23 22:14:00,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:14:00,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:00,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:14:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:14:00,132 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2019-11-23 22:14:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:00,172 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-11-23 22:14:00,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:14:00,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 22:14:00,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:00,174 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:14:00,174 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:14:00,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:14:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:14:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:14:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:14:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 22:14:00,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-11-23 22:14:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:00,187 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 22:14:00,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:14:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 22:14:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:14:00,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:00,189 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:00,190 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1714420412, now seen corresponding path program 1 times [2019-11-23 22:14:00,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:00,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495009816] [2019-11-23 22:14:00,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:00,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495009816] [2019-11-23 22:14:00,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985586498] [2019-11-23 22:14:00,509 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 22:14:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:00,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:14:00,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:00,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:00,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-11-23 22:14:00,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832245483] [2019-11-23 22:14:00,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:14:00,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:14:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:14:00,733 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2019-11-23 22:14:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:00,916 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-11-23 22:14:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:14:00,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-23 22:14:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:00,918 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:14:00,918 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:14:00,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:14:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:14:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:14:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:14:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 22:14:00,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2019-11-23 22:14:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:00,924 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 22:14:00,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:14:00,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 22:14:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:14:00,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:00,925 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:01,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:01,127 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:01,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 488445872, now seen corresponding path program 1 times [2019-11-23 22:14:01,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:01,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019141195] [2019-11-23 22:14:01,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:01,555 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 42 [2019-11-23 22:14:01,833 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 49 [2019-11-23 22:14:04,110 WARN L192 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 112 DAG size of output: 27 [2019-11-23 22:14:06,323 WARN L192 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 88 DAG size of output: 20 [2019-11-23 22:14:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:06,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019141195] [2019-11-23 22:14:06,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543690849] [2019-11-23 22:14:06,379 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 22:14:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:06,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:14:06,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:06,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:08,630 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2019-11-23 22:14:08,631 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:08,647 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:08,648 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 1 [2019-11-23 22:14:08,649 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:08,740 INFO L567 ElimStorePlain]: treesize reduction 292, result has 11.5 percent of original size [2019-11-23 22:14:08,740 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-23 22:14:08,740 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-23 22:14:08,740 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-23 22:14:08,741 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:08,742 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:395, output treesize:38 [2019-11-23 22:14:09,403 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-23 22:14:09,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,447 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:09,448 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,458 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:09,460 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:09,475 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:09,476 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 61 [2019-11-23 22:14:09,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:09,479 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,494 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:14:09,495 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:14:09,496 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2019-11-23 22:14:09,496 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:09,503 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,520 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:09,522 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 62 treesize of output 62 [2019-11-23 22:14:09,522 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,640 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2019-11-23 22:14:09,641 INFO L567 ElimStorePlain]: treesize reduction 6, result has 92.4 percent of original size [2019-11-23 22:14:09,643 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-11-23 22:14:09,644 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:325, output treesize:73 [2019-11-23 22:14:12,231 WARN L192 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 37 [2019-11-23 22:14:14,309 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-23 22:14:14,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:16,551 WARN L192 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2019-11-23 22:14:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:16,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:16,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-11-23 22:14:16,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884136654] [2019-11-23 22:14:16,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:14:16,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:14:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=111, Unknown=1, NotChecked=0, Total=156 [2019-11-23 22:14:16,567 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 13 states. [2019-11-23 22:14:16,993 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-11-23 22:14:17,340 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-11-23 22:14:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:17,511 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-11-23 22:14:17,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:14:17,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 22:14:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:17,514 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:14:17,514 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:14:17,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=72, Invalid=167, Unknown=1, NotChecked=0, Total=240 [2019-11-23 22:14:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:14:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-23 22:14:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:14:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 22:14:17,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2019-11-23 22:14:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:17,521 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 22:14:17,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:14:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 22:14:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:14:17,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:17,522 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:17,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:17,729 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1444263296, now seen corresponding path program 2 times [2019-11-23 22:14:17,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:17,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646268279] [2019-11-23 22:14:17,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:14:17,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646268279] [2019-11-23 22:14:17,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:17,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:14:17,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802939597] [2019-11-23 22:14:17,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:14:17,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:14:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:14:17,771 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2019-11-23 22:14:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:17,786 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-11-23 22:14:17,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:14:17,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:14:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:17,789 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:14:17,790 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:14:17,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:14:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:14:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:14:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:14:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:14:17,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2019-11-23 22:14:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:17,800 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:14:17,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:14:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:14:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:14:17,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:17,801 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:17,801 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:17,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 570181232, now seen corresponding path program 3 times [2019-11-23 22:14:17,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:17,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259666413] [2019-11-23 22:14:17,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:20,408 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 167 DAG size of output: 44 [2019-11-23 22:14:22,990 WARN L192 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 343 DAG size of output: 53 [2019-11-23 22:14:23,505 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 52 [2019-11-23 22:14:25,895 WARN L192 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 197 DAG size of output: 42 [2019-11-23 22:14:26,084 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 33 [2019-11-23 22:14:26,252 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 30 [2019-11-23 22:14:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:26,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259666413] [2019-11-23 22:14:26,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493012619] [2019-11-23 22:14:26,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:56,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:14:56,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:56,824 WARN L253 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 22:14:56,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:56,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:56,958 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2019-11-23 22:14:56,959 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:56,967 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:56,967 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:56,974 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:56,974 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:56,988 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2019-11-23 22:14:56,989 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:03,162 WARN L192 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2019-11-23 22:15:03,163 INFO L567 ElimStorePlain]: treesize reduction 787, result has 5.9 percent of original size [2019-11-23 22:15:03,163 INFO L464 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2019-11-23 22:15:03,163 INFO L464 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2019-11-23 22:15:03,164 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_5| vanished before elimination [2019-11-23 22:15:03,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:15:03,164 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:1005, output treesize:49 [2019-11-23 22:15:03,654 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2019-11-23 22:15:06,049 WARN L192 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2019-11-23 22:15:06,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,102 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:06,103 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 63 treesize of output 63 [2019-11-23 22:15:06,104 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:06,124 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:06,125 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 63 treesize of output 63 [2019-11-23 22:15:06,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:06,126 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:06,130 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:15:06,131 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:06,139 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:15:06,141 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:15:06,141 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:15:06,146 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:15:06,147 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 1 [2019-11-23 22:15:06,147 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:06,155 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:15:06,155 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:06,396 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-23 22:15:06,397 INFO L567 ElimStorePlain]: treesize reduction 11, result has 87.8 percent of original size [2019-11-23 22:15:06,398 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-23 22:15:06,399 INFO L221 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:331, output treesize:79 [2019-11-23 22:15:07,431 WARN L192 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-23 22:15:07,700 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-23 22:15:13,072 WARN L192 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2019-11-23 22:15:13,711 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-23 22:15:14,175 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-23 22:15:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:14,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:14,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2019-11-23 22:15:14,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839565304] [2019-11-23 22:15:14,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:15:14,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:15:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:15:14,709 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 25 states. [2019-11-23 22:15:16,864 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-11-23 22:15:17,156 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2019-11-23 22:15:19,855 WARN L192 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2019-11-23 22:15:23,073 WARN L192 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2019-11-23 22:15:23,367 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 22:15:24,235 WARN L192 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2019-11-23 22:15:24,794 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-11-23 22:15:25,156 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2019-11-23 22:15:29,375 WARN L192 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2019-11-23 22:15:30,001 WARN L192 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-11-23 22:15:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:30,061 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2019-11-23 22:15:30,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:15:30,062 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 22 [2019-11-23 22:15:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:30,062 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:15:30,063 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:15:30,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:15:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:15:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 22:15:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:15:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:15:30,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2019-11-23 22:15:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:30,069 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:15:30,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:15:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:15:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:15:30,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:30,071 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:30,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:30,279 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -823302864, now seen corresponding path program 4 times [2019-11-23 22:15:30,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:30,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329929253] [2019-11-23 22:15:30,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:38,955 WARN L192 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 136 DAG size of output: 45 [2019-11-23 22:15:39,229 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 55 [2019-11-23 22:15:39,607 WARN L192 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 56