/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/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:11:57,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:11:57,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:11:57,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:11:57,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:11:57,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:11:57,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:11:57,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:11:57,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:11:57,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:11:57,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:11:57,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:11:57,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:11:57,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:11:57,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:11:57,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:11:57,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:11:57,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:11:57,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:11:57,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:11:57,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:11:57,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:11:57,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:11:57,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:11:57,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:11:57,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:11:57,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:11:57,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:11:57,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:11:57,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:11:57,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:11:57,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:11:57,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:11:57,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:11:57,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:11:57,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:11:57,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:11:57,161 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:11:57,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:11:57,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:11:57,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:11:57,166 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:11:57,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:11:57,167 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:11:57,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:11:57,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:11:57,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:11:57,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:11:57,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:11:57,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:11:57,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:11:57,169 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:11:57,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:11:57,169 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:11:57,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:11:57,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:11:57,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:11:57,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:11:57,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:11:57,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:57,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:11:57,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:11:57,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:11:57,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:11:57,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:11:57,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:11:57,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:11:57,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:11:57,466 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:11:57,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:11:57,473 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:11:57,474 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:11:57,475 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-11-23 22:11:57,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4064e8c83/37682ac5f45443d985afbb352d86d261/FLAGda78f219d [2019-11-23 22:11:58,006 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:11:58,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-11-23 22:11:58,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4064e8c83/37682ac5f45443d985afbb352d86d261/FLAGda78f219d [2019-11-23 22:11:58,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4064e8c83/37682ac5f45443d985afbb352d86d261 [2019-11-23 22:11:58,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:11:58,378 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:11:58,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:58,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:11:58,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:11:58,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c422ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58, skipping insertion in model container [2019-11-23 22:11:58,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:11:58,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:11:58,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:58,607 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:11:58,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:58,640 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:11:58,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58 WrapperNode [2019-11-23 22:11:58,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:58,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:58,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:11:58,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:11:58,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:58,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:11:58,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:11:58,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:11:58,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... [2019-11-23 22:11:58,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:11:58,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:11:58,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:11:58,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:11:58,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:11:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:11:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:11:58,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:11:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:11:59,058 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:11:59,058 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:11:59,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:59 BoogieIcfgContainer [2019-11-23 22:11:59,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:11:59,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:11:59,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:11:59,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:11:59,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:11:58" (1/3) ... [2019-11-23 22:11:59,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473f6f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:59, skipping insertion in model container [2019-11-23 22:11:59,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:58" (2/3) ... [2019-11-23 22:11:59,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473f6f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:59, skipping insertion in model container [2019-11-23 22:11:59,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:59" (3/3) ... [2019-11-23 22:11:59,084 INFO L109 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2019-11-23 22:11:59,104 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:11:59,111 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:11:59,123 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:11:59,146 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:11:59,147 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:11:59,147 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:11:59,147 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:11:59,147 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:11:59,147 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:11:59,147 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:11:59,147 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:11:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:11:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:11:59,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:59,168 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:59,169 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash 186158361, now seen corresponding path program 1 times [2019-11-23 22:11:59,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:59,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153585317] [2019-11-23 22:11:59,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:59,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153585317] [2019-11-23 22:11:59,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:59,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:11:59,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352564757] [2019-11-23 22:11:59,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:11:59,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:11:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:59,324 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-23 22:11:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:59,339 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2019-11-23 22:11:59,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:11:59,340 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:11:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:59,348 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:11:59,348 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:11:59,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:11:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:11:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:11:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:11:59,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 22:11:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:59,381 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:11:59,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:11:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:11:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:11:59,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:59,382 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:59,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 180617235, now seen corresponding path program 1 times [2019-11-23 22:11:59,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:59,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530687672] [2019-11-23 22:11:59,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:59,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530687672] [2019-11-23 22:11:59,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:59,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:11:59,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749486697] [2019-11-23 22:11:59,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:11:59,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:11:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:11:59,486 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2019-11-23 22:11:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:59,555 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-11-23 22:11:59,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:11:59,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 22:11:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:59,557 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:11:59,557 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:11:59,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:11:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:11:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 22:11:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:11:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 22:11:59,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2019-11-23 22:11:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:59,563 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 22:11:59,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:11:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 22:11:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:11:59,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:59,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:59,565 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash -875113359, now seen corresponding path program 1 times [2019-11-23 22:11:59,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:59,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981460299] [2019-11-23 22:11:59,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:59,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981460299] [2019-11-23 22:11:59,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240606145] [2019-11-23 22:11:59,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:11:59,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:00,047 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 11 treesize of output 7 [2019-11-23 22:12:00,047 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:00,051 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:00,052 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:00,052 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 22:12:00,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:00,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:00,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:12:00,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604837243] [2019-11-23 22:12:00,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:12:00,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:12:00,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:00,115 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 12 states. [2019-11-23 22:12:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:00,481 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-23 22:12:00,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:12:00,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-11-23 22:12:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:00,482 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:12:00,483 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:12:00,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:12:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-23 22:12:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:12:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-23 22:12:00,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2019-11-23 22:12:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:00,489 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-23 22:12:00,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:12:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-23 22:12:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:12:00,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:00,490 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:00,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:00,691 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash -324855195, now seen corresponding path program 1 times [2019-11-23 22:12:00,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:00,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225608213] [2019-11-23 22:12:00,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:00,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225608213] [2019-11-23 22:12:00,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438751432] [2019-11-23 22:12:00,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:00,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:12:00,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:00,931 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 15 treesize of output 11 [2019-11-23 22:12:00,931 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:00,940 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:00,941 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 22:12:00,941 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:00,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:00,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:00,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2019-11-23 22:12:00,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554052243] [2019-11-23 22:12:00,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:12:00,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:00,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:12:00,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:00,995 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-23 22:12:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:01,164 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-23 22:12:01,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:12:01,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-23 22:12:01,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:01,165 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:12:01,165 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:12:01,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:12:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2019-11-23 22:12:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:12:01,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-23 22:12:01,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-11-23 22:12:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:01,178 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-23 22:12:01,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:12:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-23 22:12:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:12:01,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:01,181 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:01,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:01,386 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1610985595, now seen corresponding path program 2 times [2019-11-23 22:12:01,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:01,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897618231] [2019-11-23 22:12:01,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:01,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897618231] [2019-11-23 22:12:01,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899435458] [2019-11-23 22:12:01,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:01,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:01,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:01,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:12:01,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:01,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:01,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 22:12:01,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440085630] [2019-11-23 22:12:01,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:12:01,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:12:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:01,614 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2019-11-23 22:12:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:01,762 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-23 22:12:01,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:12:01,763 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-11-23 22:12:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:01,763 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:12:01,764 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:12:01,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:12:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:12:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:12:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-23 22:12:01,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-11-23 22:12:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:01,775 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-23 22:12:01,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:12:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-23 22:12:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:12:01,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:01,777 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:01,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:01,983 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 731310041, now seen corresponding path program 3 times [2019-11-23 22:12:01,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:01,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844762586] [2019-11-23 22:12:01,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:02,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844762586] [2019-11-23 22:12:02,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763899891] [2019-11-23 22:12:02,198 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:02,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:12:02,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:02,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:12:02,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:02,306 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 13 treesize of output 9 [2019-11-23 22:12:02,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:02,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:02,314 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:02,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 22:12:02,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:02,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:02,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-23 22:12:02,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238561509] [2019-11-23 22:12:02,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:02,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:02,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:02,421 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 19 states. [2019-11-23 22:12:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:02,695 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-23 22:12:02,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:02,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-23 22:12:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:02,696 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:12:02,696 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:12:02,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:12:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2019-11-23 22:12:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:12:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-23 22:12:02,703 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2019-11-23 22:12:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:02,703 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-23 22:12:02,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-23 22:12:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:12:02,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:02,704 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:02,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:02,905 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1018012655, now seen corresponding path program 4 times [2019-11-23 22:12:02,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:02,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32813610] [2019-11-23 22:12:02,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32813610] [2019-11-23 22:12:03,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859192544] [2019-11-23 22:12:03,001 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:03,037 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:03,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:03,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:12:03,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:03,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 22:12:03,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447815097] [2019-11-23 22:12:03,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:12:03,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:12:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:03,133 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 16 states. [2019-11-23 22:12:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:03,249 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-23 22:12:03,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:12:03,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-23 22:12:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:03,250 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:12:03,250 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:12:03,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:12:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 22:12:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:12:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-23 22:12:03,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2019-11-23 22:12:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:03,256 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-23 22:12:03,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:12:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-23 22:12:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:12:03,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:03,258 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:03,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:03,464 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 985881805, now seen corresponding path program 5 times [2019-11-23 22:12:03,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:03,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350369036] [2019-11-23 22:12:03,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350369036] [2019-11-23 22:12:03,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765470314] [2019-11-23 22:12:03,641 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:03,684 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 22:12:03,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:03,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:12:03,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:03,701 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 15 treesize of output 11 [2019-11-23 22:12:03,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:03,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:03,708 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 22:12:03,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:03,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:03,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2019-11-23 22:12:03,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122379010] [2019-11-23 22:12:03,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:12:03,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:03,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:12:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:03,836 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 18 states. [2019-11-23 22:12:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:04,195 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-23 22:12:04,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:12:04,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2019-11-23 22:12:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:04,196 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:12:04,196 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:12:04,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:12:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2019-11-23 22:12:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:12:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-23 22:12:04,203 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2019-11-23 22:12:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:04,203 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-23 22:12:04,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:12:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-23 22:12:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:12:04,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:04,205 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:04,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:04,416 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1173257955, now seen corresponding path program 6 times [2019-11-23 22:12:04,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:04,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067926060] [2019-11-23 22:12:04,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:04,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067926060] [2019-11-23 22:12:04,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909691075] [2019-11-23 22:12:04,528 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:04,575 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:12:04,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:04,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:12:04,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:04,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:04,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 22:12:04,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292777764] [2019-11-23 22:12:04,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:04,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:04,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:04,689 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2019-11-23 22:12:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:04,851 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-23 22:12:04,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:12:04,851 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2019-11-23 22:12:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:04,852 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:12:04,852 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:12:04,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:12:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:12:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:12:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-23 22:12:04,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2019-11-23 22:12:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:04,860 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-23 22:12:04,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-23 22:12:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:12:04,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:04,861 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:05,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:05,074 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:05,075 INFO L82 PathProgramCache]: Analyzing trace with hash -92169919, now seen corresponding path program 7 times [2019-11-23 22:12:05,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:05,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676922648] [2019-11-23 22:12:05,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:05,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676922648] [2019-11-23 22:12:05,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974939030] [2019-11-23 22:12:05,293 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:05,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:12:05,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:05,357 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 15 treesize of output 11 [2019-11-23 22:12:05,357 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:05,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:05,362 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 22:12:05,363 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:05,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:05,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:05,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 20 [2019-11-23 22:12:05,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018327183] [2019-11-23 22:12:05,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:12:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:12:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:05,495 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 20 states. [2019-11-23 22:12:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:05,882 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-23 22:12:05,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:12:05,882 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2019-11-23 22:12:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:05,884 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:12:05,884 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:12:05,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:12:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:12:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-11-23 22:12:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:12:05,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-23 22:12:05,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2019-11-23 22:12:05,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:05,892 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-23 22:12:05,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:12:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-23 22:12:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:12:05,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:05,894 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:06,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:06,097 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1251041623, now seen corresponding path program 8 times [2019-11-23 22:12:06,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:06,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638321379] [2019-11-23 22:12:06,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:06,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638321379] [2019-11-23 22:12:06,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948648798] [2019-11-23 22:12:06,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:06,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:06,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:06,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:12:06,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:06,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:06,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 22:12:06,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362541450] [2019-11-23 22:12:06,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:12:06,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:06,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:12:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:06,422 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2019-11-23 22:12:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:06,639 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2019-11-23 22:12:06,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:06,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2019-11-23 22:12:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:06,640 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:12:06,640 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:12:06,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:12:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:12:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:12:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-23 22:12:06,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2019-11-23 22:12:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:06,648 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-23 22:12:06,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:12:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-23 22:12:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:12:06,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:06,649 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:06,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:06,853 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash -747455179, now seen corresponding path program 9 times [2019-11-23 22:12:06,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:06,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142661715] [2019-11-23 22:12:06,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:07,076 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 22:12:07,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142661715] [2019-11-23 22:12:07,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120797595] [2019-11-23 22:12:07,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:07,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:12:07,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:07,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:12:07,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:07,270 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 15 treesize of output 11 [2019-11-23 22:12:07,270 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:07,274 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:07,274 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:07,274 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 22:12:07,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:07,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:07,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-11-23 22:12:07,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921510876] [2019-11-23 22:12:07,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:12:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:12:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:07,687 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 33 states. [2019-11-23 22:12:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:09,491 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2019-11-23 22:12:09,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:12:09,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-11-23 22:12:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:09,499 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:12:09,499 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:12:09,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=494, Invalid=4476, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:12:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:12:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-11-23 22:12:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:12:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-23 22:12:09,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2019-11-23 22:12:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:09,509 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-23 22:12:09,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:12:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-23 22:12:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:12:09,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:09,510 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:09,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:09,714 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:09,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1870665559, now seen corresponding path program 10 times [2019-11-23 22:12:09,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:09,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503777202] [2019-11-23 22:12:09,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:10,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503777202] [2019-11-23 22:12:10,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830313319] [2019-11-23 22:12:10,045 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:10,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:10,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:10,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:12:10,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:10,380 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 15 treesize of output 11 [2019-11-23 22:12:10,381 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:10,388 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:10,388 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:10,388 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:10,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:10,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:10,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-11-23 22:12:10,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399621621] [2019-11-23 22:12:10,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:12:10,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:12:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:10,922 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 37 states. [2019-11-23 22:12:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:13,225 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-11-23 22:12:13,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:12:13,226 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2019-11-23 22:12:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:13,226 INFO L225 Difference]: With dead ends: 89 [2019-11-23 22:12:13,226 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:12:13,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=571, Invalid=6071, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 22:12:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:12:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2019-11-23 22:12:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:12:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-23 22:12:13,237 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2019-11-23 22:12:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:13,237 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-23 22:12:13,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:12:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-23 22:12:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:12:13,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:13,238 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,451 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1193657443, now seen corresponding path program 11 times [2019-11-23 22:12:13,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008379446] [2019-11-23 22:12:13,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:13,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008379446] [2019-11-23 22:12:13,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084536426] [2019-11-23 22:12:13,788 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,915 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 22:12:13,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:13,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 22:12:13,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:14,187 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 13 treesize of output 9 [2019-11-23 22:12:14,188 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:14,193 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:14,193 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:14,193 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 22:12:14,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:14,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:14,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2019-11-23 22:12:14,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145876333] [2019-11-23 22:12:14,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:12:14,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:14,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:12:14,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:14,546 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 39 states. [2019-11-23 22:12:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:15,634 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-23 22:12:15,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:12:15,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 52 [2019-11-23 22:12:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:15,635 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:12:15,635 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:12:15,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:12:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:12:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2019-11-23 22:12:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:12:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-11-23 22:12:15,643 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2019-11-23 22:12:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:15,643 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-11-23 22:12:15,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:12:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-11-23 22:12:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:12:15,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:15,644 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:15,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,846 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:15,847 INFO L82 PathProgramCache]: Analyzing trace with hash 215578035, now seen corresponding path program 12 times [2019-11-23 22:12:15,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:15,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491676626] [2019-11-23 22:12:15,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491676626] [2019-11-23 22:12:16,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236501845] [2019-11-23 22:12:16,052 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 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 22:12:16,125 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:12:16,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:16,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:12:16,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:16,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2019-11-23 22:12:16,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151329166] [2019-11-23 22:12:16,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:12:16,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:12:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:16,352 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 31 states. [2019-11-23 22:12:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:16,665 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2019-11-23 22:12:16,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:12:16,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2019-11-23 22:12:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:16,667 INFO L225 Difference]: With dead ends: 100 [2019-11-23 22:12:16,667 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:12:16,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:12:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 22:12:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:12:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-23 22:12:16,676 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2019-11-23 22:12:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:16,676 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-23 22:12:16,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:12:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-23 22:12:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:12:16,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,677 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:16,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:16,881 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1778046481, now seen corresponding path program 13 times [2019-11-23 22:12:16,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:16,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134112961] [2019-11-23 22:12:16,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134112961] [2019-11-23 22:12:17,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190258403] [2019-11-23 22:12:17,210 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 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 22:12:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,289 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 15 treesize of output 11 [2019-11-23 22:12:17,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:17,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:17,296 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 22:12:17,296 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:17,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 32 [2019-11-23 22:12:17,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287253091] [2019-11-23 22:12:17,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:12:17,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:12:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:12:17,574 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 32 states. [2019-11-23 22:12:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,642 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-23 22:12:18,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:12:18,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2019-11-23 22:12:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,644 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:12:18,644 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:12:18,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:12:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:12:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2019-11-23 22:12:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:12:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-11-23 22:12:18,654 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2019-11-23 22:12:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,655 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-11-23 22:12:18,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:12:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-11-23 22:12:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:12:18,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,656 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:18,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,863 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1367362009, now seen corresponding path program 14 times [2019-11-23 22:12:18,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:18,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520654031] [2019-11-23 22:12:18,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 129 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520654031] [2019-11-23 22:12:19,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118019295] [2019-11-23 22:12:19,100 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 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 22:12:19,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:19,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:19,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:12:19,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:19,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2019-11-23 22:12:19,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923769919] [2019-11-23 22:12:19,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:12:19,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:12:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:12:19,420 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 34 states. [2019-11-23 22:12:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:19,825 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2019-11-23 22:12:19,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:12:19,825 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2019-11-23 22:12:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:19,826 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:12:19,826 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:12:19,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:12:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:12:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-11-23 22:12:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:12:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-23 22:12:19,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2019-11-23 22:12:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:19,836 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-23 22:12:19,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:12:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-23 22:12:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:12:19,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:19,837 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:20,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,040 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1314727931, now seen corresponding path program 15 times [2019-11-23 22:12:20,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:20,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418001965] [2019-11-23 22:12:20,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:20,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418001965] [2019-11-23 22:12:20,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838951357] [2019-11-23 22:12:20,498 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 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 22:12:20,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 22:12:20,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:20,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:12:20,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:20,809 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 15 treesize of output 11 [2019-11-23 22:12:20,810 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:20,815 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:20,815 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:20,815 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 22:12:21,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 153 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:21,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2019-11-23 22:12:21,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913933568] [2019-11-23 22:12:21,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:12:21,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:12:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:12:21,654 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 49 states. [2019-11-23 22:12:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:25,204 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2019-11-23 22:12:25,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-23 22:12:25,205 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 64 [2019-11-23 22:12:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:25,205 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:12:25,205 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:12:25,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=932, Invalid=11278, Unknown=0, NotChecked=0, Total=12210 [2019-11-23 22:12:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:12:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2019-11-23 22:12:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:12:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-23 22:12:25,221 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2019-11-23 22:12:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:25,222 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-23 22:12:25,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:12:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-23 22:12:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:12:25,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:25,223 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:25,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:25,428 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1742430585, now seen corresponding path program 16 times [2019-11-23 22:12:25,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:25,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214081268] [2019-11-23 22:12:25,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:26,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214081268] [2019-11-23 22:12:26,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064996856] [2019-11-23 22:12:26,161 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 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 22:12:26,350 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:26,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:26,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 57 conjunts are in the unsatisfiable core [2019-11-23 22:12:26,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:26,668 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 13 treesize of output 9 [2019-11-23 22:12:26,669 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:26,672 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:26,672 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:26,673 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 22:12:27,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:27,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2019-11-23 22:12:27,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530996398] [2019-11-23 22:12:27,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:12:27,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:12:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:12:27,211 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 51 states. [2019-11-23 22:12:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:28,479 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-23 22:12:28,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:12:28,479 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 70 [2019-11-23 22:12:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:28,480 INFO L225 Difference]: With dead ends: 81 [2019-11-23 22:12:28,480 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 22:12:28,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=266, Invalid=4024, Unknown=0, NotChecked=0, Total=4290 [2019-11-23 22:12:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 22:12:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2019-11-23 22:12:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:12:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-11-23 22:12:28,490 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2019-11-23 22:12:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:28,490 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-11-23 22:12:28,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:12:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-11-23 22:12:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:12:28,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:28,491 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:28,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,692 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1759268239, now seen corresponding path program 17 times [2019-11-23 22:12:28,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:28,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980788772] [2019-11-23 22:12:28,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 201 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:28,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980788772] [2019-11-23 22:12:28,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199108007] [2019-11-23 22:12:28,971 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 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 22:12:29,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:12:29,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:29,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:12:29,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:29,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:29,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2019-11-23 22:12:29,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903155026] [2019-11-23 22:12:29,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:12:29,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:12:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:12:29,468 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 40 states. [2019-11-23 22:12:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:30,132 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2019-11-23 22:12:30,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:12:30,132 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2019-11-23 22:12:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:30,134 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:12:30,134 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:12:30,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=620, Invalid=2136, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:12:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:12:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 22:12:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:12:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2019-11-23 22:12:30,149 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2019-11-23 22:12:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:30,150 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2019-11-23 22:12:30,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:12:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2019-11-23 22:12:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:12:30,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:30,152 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:30,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:30,360 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1997172115, now seen corresponding path program 18 times [2019-11-23 22:12:30,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:30,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106415669] [2019-11-23 22:12:30,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:31,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106415669] [2019-11-23 22:12:31,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129872904] [2019-11-23 22:12:31,018 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 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 22:12:31,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:12:31,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:31,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:12:31,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:31,519 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 15 treesize of output 11 [2019-11-23 22:12:31,519 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:31,522 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:31,522 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:31,522 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 22:12:32,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 231 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:32,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:32,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2019-11-23 22:12:32,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189621549] [2019-11-23 22:12:32,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:12:32,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:12:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:12:32,458 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 57 states. [2019-11-23 22:12:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:37,000 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2019-11-23 22:12:37,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-11-23 22:12:37,001 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 76 [2019-11-23 22:12:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:37,001 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:12:37,001 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:12:37,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1193, Invalid=15837, Unknown=0, NotChecked=0, Total=17030 [2019-11-23 22:12:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:12:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-11-23 22:12:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:12:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2019-11-23 22:12:37,012 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 76 [2019-11-23 22:12:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:37,012 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2019-11-23 22:12:37,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 22:12:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2019-11-23 22:12:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:12:37,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:37,013 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:37,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:37,214 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash 260737761, now seen corresponding path program 19 times [2019-11-23 22:12:37,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:37,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985003841] [2019-11-23 22:12:37,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:37,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985003841] [2019-11-23 22:12:37,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142276867] [2019-11-23 22:12:37,779 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 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 22:12:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:37,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-23 22:12:37,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:37,845 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 15 treesize of output 11 [2019-11-23 22:12:37,845 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:37,850 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:37,850 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 22:12:37,850 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:38,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:38,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 44 [2019-11-23 22:12:38,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610423085] [2019-11-23 22:12:38,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:12:38,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:38,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:12:38,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:12:38,377 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 44 states. [2019-11-23 22:12:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:40,173 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2019-11-23 22:12:40,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:12:40,176 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 82 [2019-11-23 22:12:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:40,177 INFO L225 Difference]: With dead ends: 93 [2019-11-23 22:12:40,177 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 22:12:40,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 22:12:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 22:12:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2019-11-23 22:12:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 22:12:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-11-23 22:12:40,188 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2019-11-23 22:12:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:40,189 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-11-23 22:12:40,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:12:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-11-23 22:12:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 22:12:40,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:40,190 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:40,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:40,393 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:40,394 INFO L82 PathProgramCache]: Analyzing trace with hash -393706761, now seen corresponding path program 20 times [2019-11-23 22:12:40,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:40,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678328712] [2019-11-23 22:12:40,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 289 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:40,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678328712] [2019-11-23 22:12:40,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538656590] [2019-11-23 22:12:40,776 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 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 22:12:40,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:40,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:40,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:12:40,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:41,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:41,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2019-11-23 22:12:41,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921168595] [2019-11-23 22:12:41,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:12:41,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:12:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:12:41,232 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2019-11-23 22:12:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:41,860 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2019-11-23 22:12:41,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:12:41,860 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2019-11-23 22:12:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:41,861 INFO L225 Difference]: With dead ends: 150 [2019-11-23 22:12:41,861 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:12:41,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=819, Invalid=2841, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 22:12:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:12:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-23 22:12:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:12:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2019-11-23 22:12:41,870 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2019-11-23 22:12:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:41,870 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2019-11-23 22:12:41,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:12:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2019-11-23 22:12:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:12:41,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:41,871 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:42,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:42,072 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711125, now seen corresponding path program 21 times [2019-11-23 22:12:42,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:42,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869500999] [2019-11-23 22:12:42,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869500999] [2019-11-23 22:12:42,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228534784] [2019-11-23 22:12:42,727 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:42,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 22:12:42,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:42,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:12:42,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:43,393 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 15 treesize of output 11 [2019-11-23 22:12:43,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:43,402 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:43,403 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:43,403 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 22:12:44,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 325 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:44,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2019-11-23 22:12:44,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459996256] [2019-11-23 22:12:44,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 22:12:44,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 22:12:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3723, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:12:44,785 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2019-11-23 22:12:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:50,456 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2019-11-23 22:12:50,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-11-23 22:12:50,456 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2019-11-23 22:12:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:50,457 INFO L225 Difference]: With dead ends: 159 [2019-11-23 22:12:50,457 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 22:12:50,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5215 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1482, Invalid=21168, Unknown=0, NotChecked=0, Total=22650 [2019-11-23 22:12:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 22:12:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2019-11-23 22:12:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:12:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2019-11-23 22:12:50,471 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2019-11-23 22:12:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:50,471 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2019-11-23 22:12:50,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 22:12:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2019-11-23 22:12:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:12:50,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:50,472 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:50,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,676 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -890154423, now seen corresponding path program 22 times [2019-11-23 22:12:50,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:50,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749336684] [2019-11-23 22:12:50,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:51,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749336684] [2019-11-23 22:12:51,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637572499] [2019-11-23 22:12:51,670 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:52,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:52,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 22:12:52,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:52,852 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 15 treesize of output 11 [2019-11-23 22:12:52,853 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:12:52,858 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:12:52,858 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:12:52,859 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 22:12:54,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 378 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:54,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:54,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 69 [2019-11-23 22:12:54,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406828882] [2019-11-23 22:12:54,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-23 22:12:54,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-23 22:12:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=4325, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 22:12:54,613 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 69 states. [2019-11-23 22:13:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:01,352 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2019-11-23 22:13:01,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-11-23 22:13:01,353 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 94 [2019-11-23 22:13:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:01,353 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:13:01,354 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:13:01,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6144 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1523, Invalid=24559, Unknown=0, NotChecked=0, Total=26082 [2019-11-23 22:13:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:13:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2019-11-23 22:13:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:13:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2019-11-23 22:13:01,365 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 94 [2019-11-23 22:13:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:01,365 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2019-11-23 22:13:01,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-23 22:13:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2019-11-23 22:13:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:13:01,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:01,365 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:01,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:01,566 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1772265155, now seen corresponding path program 23 times [2019-11-23 22:13:01,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:01,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654172765] [2019-11-23 22:13:01,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:02,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654172765] [2019-11-23 22:13:02,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454685580] [2019-11-23 22:13:02,354 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:02,552 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-23 22:13:02,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:02,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 77 conjunts are in the unsatisfiable core [2019-11-23 22:13:02,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,197 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 13 treesize of output 9 [2019-11-23 22:13:03,198 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:03,206 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:03,207 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:03,207 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 22:13:04,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:04,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:04,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2019-11-23 22:13:04,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237395536] [2019-11-23 22:13:04,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-11-23 22:13:04,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-11-23 22:13:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4762, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:13:04,180 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 71 states. [2019-11-23 22:13:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:07,490 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2019-11-23 22:13:07,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:13:07,490 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 100 [2019-11-23 22:13:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:07,491 INFO L225 Difference]: With dead ends: 111 [2019-11-23 22:13:07,491 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 22:13:07,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=366, Invalid=7824, Unknown=0, NotChecked=0, Total=8190 [2019-11-23 22:13:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 22:13:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2019-11-23 22:13:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:13:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2019-11-23 22:13:07,504 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2019-11-23 22:13:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:07,505 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2019-11-23 22:13:07,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-11-23 22:13:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2019-11-23 22:13:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 22:13:07,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:07,505 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:07,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,710 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2096051373, now seen corresponding path program 24 times [2019-11-23 22:13:07,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:07,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668391404] [2019-11-23 22:13:07,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 451 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:08,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668391404] [2019-11-23 22:13:08,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509843686] [2019-11-23 22:13:08,186 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:08,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:13:08,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:08,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:13:08,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 512 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:09,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2019-11-23 22:13:09,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306614112] [2019-11-23 22:13:09,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:13:09,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:13:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:09,351 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 55 states. [2019-11-23 22:13:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:10,169 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2019-11-23 22:13:10,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:13:10,170 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2019-11-23 22:13:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:10,171 INFO L225 Difference]: With dead ends: 180 [2019-11-23 22:13:10,171 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 22:13:10,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1170, Invalid=4086, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 22:13:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 22:13:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-23 22:13:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 22:13:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2019-11-23 22:13:10,185 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2019-11-23 22:13:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:10,185 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2019-11-23 22:13:10,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:13:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2019-11-23 22:13:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 22:13:10,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:10,186 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:10,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:10,391 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:10,392 INFO L82 PathProgramCache]: Analyzing trace with hash 678999985, now seen corresponding path program 25 times [2019-11-23 22:13:10,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:10,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932534443] [2019-11-23 22:13:10,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:11,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932534443] [2019-11-23 22:13:11,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634425129] [2019-11-23 22:13:11,232 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:11,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 77 conjunts are in the unsatisfiable core [2019-11-23 22:13:11,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:11,306 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 15 treesize of output 11 [2019-11-23 22:13:11,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:11,312 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:11,313 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 22:13:11,313 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 22:13:12,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:12,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:12,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 56 [2019-11-23 22:13:12,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648710177] [2019-11-23 22:13:12,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:13:12,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:13:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:13:12,150 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 56 states. [2019-11-23 22:13:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:15,255 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2019-11-23 22:13:15,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 22:13:15,256 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 106 [2019-11-23 22:13:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:15,257 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:13:15,257 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:13:15,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 22:13:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:13:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2019-11-23 22:13:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-23 22:13:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2019-11-23 22:13:15,272 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2019-11-23 22:13:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:15,272 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2019-11-23 22:13:15,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:13:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2019-11-23 22:13:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 22:13:15,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:15,273 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:15,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:15,476 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1374930887, now seen corresponding path program 26 times [2019-11-23 22:13:15,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:15,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972707422] [2019-11-23 22:13:15,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:16,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972707422] [2019-11-23 22:13:16,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291580848] [2019-11-23 22:13:16,167 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:16,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:16,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:16,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:13:16,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:16,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:16,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2019-11-23 22:13:16,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102992063] [2019-11-23 22:13:16,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 22:13:16,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 22:13:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 22:13:16,827 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 58 states. [2019-11-23 22:13:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:17,748 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2019-11-23 22:13:17,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:13:17,748 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2019-11-23 22:13:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:17,749 INFO L225 Difference]: With dead ends: 190 [2019-11-23 22:13:17,750 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:13:17,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1301, Invalid=4551, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 22:13:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:13:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-11-23 22:13:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:13:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2019-11-23 22:13:17,761 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2019-11-23 22:13:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:17,761 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2019-11-23 22:13:17,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 22:13:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2019-11-23 22:13:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 22:13:17,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:17,762 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:17,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:17,963 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1186695771, now seen corresponding path program 27 times [2019-11-23 22:13:17,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:17,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397739122] [2019-11-23 22:13:17,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:19,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397739122] [2019-11-23 22:13:19,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638205685] [2019-11-23 22:13:19,293 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:19,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 22:13:19,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:19,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 22:13:19,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,331 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 15 treesize of output 11 [2019-11-23 22:13:20,331 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:20,336 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:20,336 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:20,337 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 22:13:22,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 561 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:22,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:22,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 81 [2019-11-23 22:13:22,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218373458] [2019-11-23 22:13:22,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-11-23 22:13:22,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-11-23 22:13:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=5817, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 22:13:22,187 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 81 states. [2019-11-23 22:13:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:30,670 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2019-11-23 22:13:30,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-11-23 22:13:30,670 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 112 [2019-11-23 22:13:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:30,671 INFO L225 Difference]: With dead ends: 199 [2019-11-23 22:13:30,671 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:13:30,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8427 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2144, Invalid=34146, Unknown=0, NotChecked=0, Total=36290 [2019-11-23 22:13:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:13:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2019-11-23 22:13:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-23 22:13:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2019-11-23 22:13:30,688 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 112 [2019-11-23 22:13:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:30,688 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2019-11-23 22:13:30,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-11-23 22:13:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2019-11-23 22:13:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 22:13:30,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:30,689 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:30,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:30,889 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash 453622553, now seen corresponding path program 28 times [2019-11-23 22:13:30,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:30,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504851168] [2019-11-23 22:13:30,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:31,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504851168] [2019-11-23 22:13:31,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316884681] [2019-11-23 22:13:31,954 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:32,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:32,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:32,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-23 22:13:32,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:33,500 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 13 treesize of output 9 [2019-11-23 22:13:33,501 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:33,504 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:33,505 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:33,505 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13