/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-tiling/skipped.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:49:58,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:49:58,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:49:58,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:49:58,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:49:58,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:49:58,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:49:58,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:49:58,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:49:58,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:49:58,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:49:58,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:49:58,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:49:58,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:49:58,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:49:58,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:49:58,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:49:58,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:49:58,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:49:58,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:49:58,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:49:58,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:49:58,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:49:58,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:49:58,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:49:58,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:49:58,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:49:58,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:49:58,090 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 20:49:58,104 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:49:58,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:49:58,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:49:58,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:49:58,106 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:49:58,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:49:58,107 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:49:58,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:49:58,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:49:58,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:49:58,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:49:58,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:49:58,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:49:58,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:49:58,108 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:49:58,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:49:58,109 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:49:58,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:49:58,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:49:58,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:49:58,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:49:58,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:49:58,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:49:58,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:49:58,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:49:58,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:49:58,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:49:58,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:49:58,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:49:58,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:49:58,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:49:58,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:49:58,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:49:58,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:49:58,395 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:49:58,396 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skipped.c [2019-11-23 20:49:58,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6d40e34/d1f3ded8ad8548cd8cb8d9ab7b195151/FLAG7cbdd00ee [2019-11-23 20:49:58,881 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:49:58,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skipped.c [2019-11-23 20:49:58,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6d40e34/d1f3ded8ad8548cd8cb8d9ab7b195151/FLAG7cbdd00ee [2019-11-23 20:49:59,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca6d40e34/d1f3ded8ad8548cd8cb8d9ab7b195151 [2019-11-23 20:49:59,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:49:59,300 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:49:59,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:49:59,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:49:59,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:49:59,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bfee95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59, skipping insertion in model container [2019-11-23 20:49:59,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:49:59,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:49:59,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:49:59,601 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:49:59,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:49:59,654 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:49:59,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59 WrapperNode [2019-11-23 20:49:59,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:49:59,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:49:59,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:49:59,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:49:59,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:49:59,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:49:59,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:49:59,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:49:59,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (1/1) ... [2019-11-23 20:49:59,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:49:59,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:49:59,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:49:59,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:49:59,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (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 20:49:59,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:49:59,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:49:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:49:59,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:49:59,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:50:00,182 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:50:00,183 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:50:00,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:50:00 BoogieIcfgContainer [2019-11-23 20:50:00,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:50:00,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:50:00,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:50:00,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:50:00,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:49:59" (1/3) ... [2019-11-23 20:50:00,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61809953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:50:00, skipping insertion in model container [2019-11-23 20:50:00,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:49:59" (2/3) ... [2019-11-23 20:50:00,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61809953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:50:00, skipping insertion in model container [2019-11-23 20:50:00,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:50:00" (3/3) ... [2019-11-23 20:50:00,200 INFO L109 eAbstractionObserver]: Analyzing ICFG skipped.c [2019-11-23 20:50:00,211 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:50:00,218 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:50:00,239 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:50:00,261 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:50:00,261 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:50:00,261 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:50:00,261 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:50:00,261 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:50:00,262 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:50:00,262 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:50:00,262 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:50:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:50:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:50:00,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:00,281 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:00,281 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1896653823, now seen corresponding path program 1 times [2019-11-23 20:50:00,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:00,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348515270] [2019-11-23 20:50:00,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:00,408 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 20:50:00,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348515270] [2019-11-23 20:50:00,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:50:00,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:50:00,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311411488] [2019-11-23 20:50:00,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:50:00,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:50:00,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:50:00,428 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-23 20:50:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:00,443 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2019-11-23 20:50:00,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:50:00,444 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:50:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:00,452 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:50:00,452 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:50:00,455 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 20:50:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:50:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:50:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:50:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 20:50:00,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-23 20:50:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:00,486 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 20:50:00,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:50:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 20:50:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:50:00,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:00,487 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:00,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:00,488 INFO L82 PathProgramCache]: Analyzing trace with hash 866599033, now seen corresponding path program 1 times [2019-11-23 20:50:00,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:00,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148504044] [2019-11-23 20:50:00,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:00,581 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 20:50:00,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148504044] [2019-11-23 20:50:00,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:50:00,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:50:00,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021743984] [2019-11-23 20:50:00,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:50:00,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:50:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:50:00,586 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2019-11-23 20:50:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:00,664 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-23 20:50:00,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:50:00,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:50:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:00,666 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:50:00,666 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:50:00,667 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 20:50:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:50:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:50:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:50:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-23 20:50:00,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2019-11-23 20:50:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:00,673 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-23 20:50:00,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:50:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-23 20:50:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:50:00,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:00,674 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:00,674 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash -365251305, now seen corresponding path program 1 times [2019-11-23 20:50:00,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:00,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749258761] [2019-11-23 20:50:00,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:00,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749258761] [2019-11-23 20:50:00,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:50:00,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:50:00,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470382861] [2019-11-23 20:50:00,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:50:00,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:50:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:50:00,759 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-23 20:50:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:00,837 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-11-23 20:50:00,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:50:00,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:50:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:00,839 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:50:00,839 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:50:00,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:50:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:50:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-23 20:50:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:50:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-23 20:50:00,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-11-23 20:50:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:00,846 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-23 20:50:00,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:50:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-23 20:50:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:50:00,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:00,847 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:00,848 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash -388042032, now seen corresponding path program 1 times [2019-11-23 20:50:00,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:00,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081303059] [2019-11-23 20:50:00,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:00,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081303059] [2019-11-23 20:50:00,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104281715] [2019-11-23 20:50:00,938 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 20:50:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:01,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:50:01,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:01,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:01,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:50:01,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351826180] [2019-11-23 20:50:01,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:50:01,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:50:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:50:01,075 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2019-11-23 20:50:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:01,154 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-23 20:50:01,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:50:01,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:50:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:01,155 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:50:01,155 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:50:01,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:50:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:50:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 20:50:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:50:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 20:50:01,161 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2019-11-23 20:50:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:01,161 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 20:50:01,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:50:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 20:50:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:50:01,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:01,163 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:01,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:01,367 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:01,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1547350130, now seen corresponding path program 2 times [2019-11-23 20:50:01,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:01,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308178136] [2019-11-23 20:50:01,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:02,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308178136] [2019-11-23 20:50:02,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322512303] [2019-11-23 20:50:02,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:02,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:02,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:02,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:50:02,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:02,380 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 20 treesize of output 16 [2019-11-23 20:50:02,380 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:02,388 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:02,388 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:02,389 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:50:02,429 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:02,430 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:50:02,431 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:02,437 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:02,438 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:02,438 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2019-11-23 20:50:02,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:50:02,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:02,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2019-11-23 20:50:02,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995443253] [2019-11-23 20:50:02,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:50:02,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:02,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:50:02,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:50:02,516 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-11-23 20:50:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:05,208 INFO L93 Difference]: Finished difference Result 177 states and 217 transitions. [2019-11-23 20:50:05,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:50:05,209 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-11-23 20:50:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:05,212 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:50:05,212 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:50:05,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:50:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:50:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 43. [2019-11-23 20:50:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:50:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-11-23 20:50:05,226 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2019-11-23 20:50:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:05,226 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-11-23 20:50:05,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:50:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-11-23 20:50:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:50:05,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:05,227 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:05,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:05,431 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2067558796, now seen corresponding path program 1 times [2019-11-23 20:50:05,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:05,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524932923] [2019-11-23 20:50:05,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:05,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524932923] [2019-11-23 20:50:05,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057607966] [2019-11-23 20:50:05,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:05,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:50:05,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:05,883 INFO L343 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-23 20:50:05,884 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-23 20:50:05,885 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:05,889 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:05,890 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:05,890 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-23 20:50:05,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:50:05,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:05,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2019-11-23 20:50:05,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046661436] [2019-11-23 20:50:05,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:50:05,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:50:05,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:50:05,952 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 18 states. [2019-11-23 20:50:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:07,269 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2019-11-23 20:50:07,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:50:07,269 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-11-23 20:50:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:07,272 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:50:07,272 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:50:07,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:50:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:50:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 50. [2019-11-23 20:50:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:50:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2019-11-23 20:50:07,284 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 19 [2019-11-23 20:50:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:07,285 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2019-11-23 20:50:07,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:50:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2019-11-23 20:50:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:50:07,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:07,286 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:07,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:07,489 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash -101522920, now seen corresponding path program 1 times [2019-11-23 20:50:07,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:07,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826231804] [2019-11-23 20:50:07,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:07,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826231804] [2019-11-23 20:50:07,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326823532] [2019-11-23 20:50:07,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:07,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:50:07,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:07,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:07,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-23 20:50:07,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191884296] [2019-11-23 20:50:07,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:50:07,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:50:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:50:07,861 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand 14 states. [2019-11-23 20:50:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:08,282 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2019-11-23 20:50:08,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:50:08,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-23 20:50:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:08,284 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:50:08,284 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:50:08,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:50:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:50:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 58. [2019-11-23 20:50:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:50:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2019-11-23 20:50:08,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 21 [2019-11-23 20:50:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:08,295 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2019-11-23 20:50:08,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:50:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2019-11-23 20:50:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:50:08,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:08,296 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:08,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:08,500 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1738442582, now seen corresponding path program 1 times [2019-11-23 20:50:08,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:08,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256192105] [2019-11-23 20:50:08,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:08,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256192105] [2019-11-23 20:50:08,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201701224] [2019-11-23 20:50:08,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:08,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:50:08,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:08,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:50:08,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:08,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 16 [2019-11-23 20:50:08,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678555976] [2019-11-23 20:50:08,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:50:08,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:50:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:50:08,920 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 16 states. [2019-11-23 20:50:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:09,718 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2019-11-23 20:50:09,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:50:09,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-11-23 20:50:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:09,720 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:50:09,720 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:50:09,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:50:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:50:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 48. [2019-11-23 20:50:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:50:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2019-11-23 20:50:09,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2019-11-23 20:50:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:09,730 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2019-11-23 20:50:09,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:50:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2019-11-23 20:50:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:50:09,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:09,731 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:09,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:09,934 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1209024913, now seen corresponding path program 1 times [2019-11-23 20:50:09,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:09,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436291568] [2019-11-23 20:50:09,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:10,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436291568] [2019-11-23 20:50:10,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459390610] [2019-11-23 20:50:10,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:10,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:50:10,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:10,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:10,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2019-11-23 20:50:10,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841155102] [2019-11-23 20:50:10,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:50:10,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:50:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:50:10,207 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 13 states. [2019-11-23 20:50:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:10,465 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2019-11-23 20:50:10,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:50:10,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-11-23 20:50:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:10,467 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:50:10,467 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:50:10,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:50:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:50:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2019-11-23 20:50:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:50:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2019-11-23 20:50:10,478 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2019-11-23 20:50:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:10,478 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2019-11-23 20:50:10,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:50:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2019-11-23 20:50:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:50:10,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:10,479 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:10,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:10,683 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2037983966, now seen corresponding path program 1 times [2019-11-23 20:50:10,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:10,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070045100] [2019-11-23 20:50:10,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:10,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070045100] [2019-11-23 20:50:10,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782491913] [2019-11-23 20:50:10,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:10,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:50:10,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:10,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:50:10,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259519776] [2019-11-23 20:50:10,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:50:10,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:50:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:50:10,840 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2019-11-23 20:50:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:11,007 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2019-11-23 20:50:11,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:50:11,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-11-23 20:50:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:11,009 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:50:11,009 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:50:11,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:50:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:50:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2019-11-23 20:50:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:50:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2019-11-23 20:50:11,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2019-11-23 20:50:11,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:11,016 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2019-11-23 20:50:11,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:50:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2019-11-23 20:50:11,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:50:11,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:11,017 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:11,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:11,220 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1443743987, now seen corresponding path program 2 times [2019-11-23 20:50:11,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:11,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664492831] [2019-11-23 20:50:11,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:11,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664492831] [2019-11-23 20:50:11,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212909523] [2019-11-23 20:50:11,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:11,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:11,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:11,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:50:11,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:12,073 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:12,075 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:50:12,075 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:12,083 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:12,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:12,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2019-11-23 20:50:12,124 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:12,127 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:12,128 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:12,130 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:12,131 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2019-11-23 20:50:12,132 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:12,141 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:12,142 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:50:12,142 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:46 [2019-11-23 20:50:12,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:50:12,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:12,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-11-23 20:50:12,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833254756] [2019-11-23 20:50:12,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:50:12,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:50:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:50:12,300 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 25 states. [2019-11-23 20:50:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:16,196 INFO L93 Difference]: Finished difference Result 327 states and 410 transitions. [2019-11-23 20:50:16,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-23 20:50:16,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-11-23 20:50:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:16,202 INFO L225 Difference]: With dead ends: 327 [2019-11-23 20:50:16,202 INFO L226 Difference]: Without dead ends: 325 [2019-11-23 20:50:16,205 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1250, Invalid=7492, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 20:50:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-11-23 20:50:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 37. [2019-11-23 20:50:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:50:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-11-23 20:50:16,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 28 [2019-11-23 20:50:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:16,224 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-11-23 20:50:16,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:50:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-11-23 20:50:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:50:16,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:16,226 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:16,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:16,431 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash -613759875, now seen corresponding path program 2 times [2019-11-23 20:50:16,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:16,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292408218] [2019-11-23 20:50:16,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:16,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292408218] [2019-11-23 20:50:16,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691631306] [2019-11-23 20:50:16,634 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:16,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:16,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:16,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:50:16,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:16,782 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 20 treesize of output 16 [2019-11-23 20:50:16,783 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:16,792 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:16,792 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:16,793 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:50:16,825 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:16,826 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-11-23 20:50:16,827 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:16,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:16,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:16,836 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:22 [2019-11-23 20:50:16,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:50:16,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:16,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-11-23 20:50:16,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836469447] [2019-11-23 20:50:16,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:50:16,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:50:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:50:16,986 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 20 states. [2019-11-23 20:50:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:17,799 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2019-11-23 20:50:17,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:50:17,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2019-11-23 20:50:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:17,801 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:50:17,801 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:50:17,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:50:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:50:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 60. [2019-11-23 20:50:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:50:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2019-11-23 20:50:17,813 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 36 [2019-11-23 20:50:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:17,814 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2019-11-23 20:50:17,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:50:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2019-11-23 20:50:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:50:17,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:17,815 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:18,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:18,018 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2092859519, now seen corresponding path program 1 times [2019-11-23 20:50:18,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:18,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210641161] [2019-11-23 20:50:18,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:18,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210641161] [2019-11-23 20:50:18,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261391849] [2019-11-23 20:50:18,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:18,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:50:18,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:18,291 INFO L343 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-23 20:50:18,292 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:50:18,293 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:18,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:18,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:18,298 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-23 20:50:18,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:50:18,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:18,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2019-11-23 20:50:18,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753790722] [2019-11-23 20:50:18,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:50:18,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:50:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:50:18,397 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 18 states. [2019-11-23 20:50:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:19,125 INFO L93 Difference]: Finished difference Result 151 states and 183 transitions. [2019-11-23 20:50:19,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:50:19,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2019-11-23 20:50:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:19,126 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:50:19,127 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:50:19,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:50:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:50:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 54. [2019-11-23 20:50:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:50:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-11-23 20:50:19,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 36 [2019-11-23 20:50:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:19,136 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-11-23 20:50:19,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:50:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-11-23 20:50:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:50:19,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:19,138 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:19,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:19,342 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1953632971, now seen corresponding path program 1 times [2019-11-23 20:50:19,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:19,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345182450] [2019-11-23 20:50:19,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:19,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345182450] [2019-11-23 20:50:19,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11248895] [2019-11-23 20:50:19,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:19,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:50:19,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:19,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:19,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:19,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 18 [2019-11-23 20:50:19,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944620171] [2019-11-23 20:50:19,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:50:19,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:50:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:50:19,663 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 18 states. [2019-11-23 20:50:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:20,404 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2019-11-23 20:50:20,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:50:20,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2019-11-23 20:50:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:20,406 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:50:20,406 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:50:20,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:50:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:50:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 45. [2019-11-23 20:50:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:50:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-11-23 20:50:20,414 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 40 [2019-11-23 20:50:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:20,414 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-11-23 20:50:20,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:50:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-11-23 20:50:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:50:20,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:20,416 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:20,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:20,620 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2142895127, now seen corresponding path program 3 times [2019-11-23 20:50:20,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:20,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885959986] [2019-11-23 20:50:20,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:50:20,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885959986] [2019-11-23 20:50:20,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30218732] [2019-11-23 20:50:20,742 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:20,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:50:20,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:20,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:50:20,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:50:20,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:20,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:50:20,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041382390] [2019-11-23 20:50:20,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:50:20,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:20,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:50:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:50:20,902 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 19 states. [2019-11-23 20:50:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:21,229 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2019-11-23 20:50:21,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:50:21,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-11-23 20:50:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:21,230 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:50:21,231 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:50:21,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:50:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:50:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2019-11-23 20:50:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:50:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-23 20:50:21,241 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 44 [2019-11-23 20:50:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:21,242 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-23 20:50:21,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:50:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-23 20:50:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:50:21,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:21,243 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:21,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:21,446 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2101161721, now seen corresponding path program 4 times [2019-11-23 20:50:21,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:21,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474658744] [2019-11-23 20:50:21,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:50:21,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474658744] [2019-11-23 20:50:21,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549979318] [2019-11-23 20:50:21,836 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:21,880 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:50:21,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:21,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:50:21,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:21,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 20:50:21,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:21,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:50:22,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:22,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-11-23 20:50:22,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711930924] [2019-11-23 20:50:22,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:50:22,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:22,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:50:22,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:50:22,133 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 21 states. [2019-11-23 20:50:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:22,876 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2019-11-23 20:50:22,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:50:22,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2019-11-23 20:50:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:22,877 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:50:22,878 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:50:22,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:50:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:50:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-23 20:50:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:50:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-11-23 20:50:22,897 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2019-11-23 20:50:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:22,897 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-11-23 20:50:22,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:50:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-11-23 20:50:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:50:22,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:22,899 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:23,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:23,103 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -415469168, now seen corresponding path program 5 times [2019-11-23 20:50:23,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:23,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916897892] [2019-11-23 20:50:23,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:50:23,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916897892] [2019-11-23 20:50:23,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768751199] [2019-11-23 20:50:23,325 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:23,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:50:23,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:23,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:50:23,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:50:23,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:23,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2019-11-23 20:50:23,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026803570] [2019-11-23 20:50:23,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:50:23,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:50:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:50:23,519 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 17 states. [2019-11-23 20:50:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:23,794 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2019-11-23 20:50:23,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:50:23,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-11-23 20:50:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:23,800 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:50:23,800 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:50:23,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:50:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:50:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-23 20:50:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:50:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-11-23 20:50:23,813 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 51 [2019-11-23 20:50:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:23,813 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-11-23 20:50:23,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:50:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-11-23 20:50:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:50:23,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:23,814 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:24,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:24,019 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash -560838990, now seen corresponding path program 6 times [2019-11-23 20:50:24,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:24,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366832745] [2019-11-23 20:50:24,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:24,392 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2019-11-23 20:50:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:24,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366832745] [2019-11-23 20:50:24,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918925267] [2019-11-23 20:50:24,780 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:24,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:50:24,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:24,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:50:24,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:24,988 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 20 treesize of output 16 [2019-11-23 20:50:24,988 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:24,994 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:24,994 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:24,995 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2019-11-23 20:50:25,036 INFO L343 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-23 20:50:25,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2019-11-23 20:50:25,037 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:25,041 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:25,041 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:25,041 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-11-23 20:50:25,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:50:25,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:25,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2019-11-23 20:50:25,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044783313] [2019-11-23 20:50:25,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:50:25,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:50:25,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:50:25,416 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 34 states. [2019-11-23 20:50:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:30,276 INFO L93 Difference]: Finished difference Result 262 states and 302 transitions. [2019-11-23 20:50:30,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-11-23 20:50:30,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2019-11-23 20:50:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:30,277 INFO L225 Difference]: With dead ends: 262 [2019-11-23 20:50:30,277 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 20:50:30,280 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1033, Invalid=8473, Unknown=0, NotChecked=0, Total=9506 [2019-11-23 20:50:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 20:50:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 97. [2019-11-23 20:50:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:50:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2019-11-23 20:50:30,293 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 53 [2019-11-23 20:50:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:30,293 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2019-11-23 20:50:30,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:50:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2019-11-23 20:50:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:50:30,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:30,294 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:30,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:30,498 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:30,498 INFO L82 PathProgramCache]: Analyzing trace with hash -420290380, now seen corresponding path program 2 times [2019-11-23 20:50:30,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:30,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365065583] [2019-11-23 20:50:30,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:31,051 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2019-11-23 20:50:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:31,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365065583] [2019-11-23 20:50:31,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887921561] [2019-11-23 20:50:31,409 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:31,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:31,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:31,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:50:31,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:31,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:31,624 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:50:31,625 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:31,631 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:31,631 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:31,631 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-23 20:50:31,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:50:31,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:31,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 36 [2019-11-23 20:50:31,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135151430] [2019-11-23 20:50:31,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:50:31,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:50:31,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:50:31,891 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 36 states. [2019-11-23 20:50:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:41,245 INFO L93 Difference]: Finished difference Result 519 states and 650 transitions. [2019-11-23 20:50:41,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2019-11-23 20:50:41,245 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 53 [2019-11-23 20:50:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:41,248 INFO L225 Difference]: With dead ends: 519 [2019-11-23 20:50:41,248 INFO L226 Difference]: Without dead ends: 517 [2019-11-23 20:50:41,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11591 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3317, Invalid=28189, Unknown=0, NotChecked=0, Total=31506 [2019-11-23 20:50:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2019-11-23 20:50:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 92. [2019-11-23 20:50:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:50:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2019-11-23 20:50:41,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 53 [2019-11-23 20:50:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:41,275 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2019-11-23 20:50:41,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:50:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2019-11-23 20:50:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:50:41,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:41,276 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:41,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:41,477 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:41,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1520653590, now seen corresponding path program 2 times [2019-11-23 20:50:41,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:41,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122717043] [2019-11-23 20:50:41,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:42,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122717043] [2019-11-23 20:50:42,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38253091] [2019-11-23 20:50:42,448 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:42,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:42,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:42,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:50:42,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:43,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 45 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:50:43,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:43,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-11-23 20:50:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473035811] [2019-11-23 20:50:43,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:50:43,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:50:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:50:43,359 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand 45 states. [2019-11-23 20:50:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:46,977 INFO L93 Difference]: Finished difference Result 211 states and 236 transitions. [2019-11-23 20:50:46,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:50:46,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 57 [2019-11-23 20:50:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:46,978 INFO L225 Difference]: With dead ends: 211 [2019-11-23 20:50:46,978 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:50:46,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1097, Invalid=7645, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 20:50:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:50:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-11-23 20:50:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:50:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2019-11-23 20:50:46,995 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 57 [2019-11-23 20:50:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:46,995 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2019-11-23 20:50:46,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:50:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2019-11-23 20:50:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:50:46,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:46,996 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:47,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:47,197 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1630364020, now seen corresponding path program 3 times [2019-11-23 20:50:47,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:47,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530814982] [2019-11-23 20:50:47,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 42 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:50:47,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530814982] [2019-11-23 20:50:47,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483366216] [2019-11-23 20:50:47,756 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:47,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:50:47,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:47,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:50:47,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:48,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:50:48,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:48,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-23 20:50:48,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839003309] [2019-11-23 20:50:48,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:50:48,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:50:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:50:48,084 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 26 states. [2019-11-23 20:50:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:49,555 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2019-11-23 20:50:49,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:50:49,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2019-11-23 20:50:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:49,556 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:50:49,557 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:50:49,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:50:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:50:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 69. [2019-11-23 20:50:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:50:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2019-11-23 20:50:49,575 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 59 [2019-11-23 20:50:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:49,575 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2019-11-23 20:50:49,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:50:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2019-11-23 20:50:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:50:49,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:49,576 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:49,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:49,787 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1527793871, now seen corresponding path program 7 times [2019-11-23 20:50:49,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:49,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943509765] [2019-11-23 20:50:49,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:50:50,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943509765] [2019-11-23 20:50:50,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559351350] [2019-11-23 20:50:50,092 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:50,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:50:50,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:50:50,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:50,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 21 [2019-11-23 20:50:50,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165618433] [2019-11-23 20:50:50,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:50:50,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:50:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:50:50,235 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 21 states. [2019-11-23 20:50:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:50:50,616 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2019-11-23 20:50:50,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:50:50,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2019-11-23 20:50:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:50:50,618 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:50:50,618 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:50:50,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:50:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:50:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-23 20:50:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:50:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2019-11-23 20:50:50,629 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 68 [2019-11-23 20:50:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:50:50,629 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2019-11-23 20:50:50,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:50:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2019-11-23 20:50:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:50:50,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:50:50,630 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:50:50,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:50,833 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:50:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:50:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash -723575827, now seen corresponding path program 8 times [2019-11-23 20:50:50,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:50:50,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466947944] [2019-11-23 20:50:50,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:50:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:50:51,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466947944] [2019-11-23 20:50:51,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649393301] [2019-11-23 20:50:51,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:50:51,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:50:51,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:50:51,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:50:51,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:50:51,305 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 20 treesize of output 16 [2019-11-23 20:50:51,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:51,313 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:51,313 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:51,313 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:50:51,342 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:50:51,343 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2019-11-23 20:50:51,343 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:50:51,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:50:51,350 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:50:51,350 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:22 [2019-11-23 20:50:51,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:50:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:50:51,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:50:51,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-11-23 20:50:51,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531207002] [2019-11-23 20:50:51,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:50:51,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:50:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:50:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:50:51,674 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 34 states. [2019-11-23 20:51:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:51:03,374 INFO L93 Difference]: Finished difference Result 1028 states and 1390 transitions. [2019-11-23 20:51:03,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2019-11-23 20:51:03,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2019-11-23 20:51:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:51:03,378 INFO L225 Difference]: With dead ends: 1028 [2019-11-23 20:51:03,378 INFO L226 Difference]: Without dead ends: 1026 [2019-11-23 20:51:03,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39567 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5981, Invalid=83121, Unknown=0, NotChecked=0, Total=89102 [2019-11-23 20:51:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2019-11-23 20:51:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 94. [2019-11-23 20:51:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:51:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2019-11-23 20:51:03,413 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 70 [2019-11-23 20:51:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:51:03,414 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2019-11-23 20:51:03,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:51:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2019-11-23 20:51:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:51:03,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:51:03,415 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:51:03,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:51:03,619 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:51:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:51:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash -795962385, now seen corresponding path program 3 times [2019-11-23 20:51:03,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:51:03,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931745367] [2019-11-23 20:51:03,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:51:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:51:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:51:04,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931745367] [2019-11-23 20:51:04,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678473050] [2019-11-23 20:51:04,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:51:04,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:51:04,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:51:04,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:51:04,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:51:04,949 INFO L343 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-11-23 20:51:04,950 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:51:04,951 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:51:04,959 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:51:04,960 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:51:04,960 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-23 20:51:05,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:51:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:51:05,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:51:05,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 41 [2019-11-23 20:51:05,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451202165] [2019-11-23 20:51:05,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:51:05,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:51:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:51:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:51:05,288 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 41 states. [2019-11-23 20:51:30,536 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-11-23 20:51:31,194 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-11-23 20:51:31,871 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2019-11-23 20:51:32,055 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2019-11-23 20:51:32,441 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36