/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:52,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:52,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:52,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:15:52,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:15:52,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:15:52,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:15:52,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:15:52,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:15:52,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:15:52,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:15:52,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:15:52,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:15:52,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:15:52,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:15:52,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:15:52,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:15:52,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:15:52,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:15:52,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:15:52,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:15:52,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:15:52,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:15:52,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:15:52,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:15:52,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:15:52,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:15:52,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:15:52,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:15:52,797 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:52,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:52,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:52,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:52,799 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:52,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:52,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:52,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:52,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:52,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:52,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:52,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:52,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:52,803 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:52,804 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:52,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:52,804 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:52,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:52,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:52,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:52,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:52,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:52,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:52,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:52,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:52,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:52,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:52,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:52,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:52,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:53,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:53,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:53,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:53,106 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:53,106 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:53,107 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2019-11-23 22:15:53,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4d618fa/1d4cf72f0a86488ab0bbf0a9ff289ee5/FLAG3c72a7b06 [2019-11-23 22:15:53,618 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:53,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2019-11-23 22:15:53,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4d618fa/1d4cf72f0a86488ab0bbf0a9ff289ee5/FLAG3c72a7b06 [2019-11-23 22:15:54,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b4d618fa/1d4cf72f0a86488ab0bbf0a9ff289ee5 [2019-11-23 22:15:54,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:54,061 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:54,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:54,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:54,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:54,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20bf000b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54, skipping insertion in model container [2019-11-23 22:15:54,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:54,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:54,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:54,302 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:54,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:54,348 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:54,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54 WrapperNode [2019-11-23 22:15:54,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:54,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:54,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:54,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:54,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:54,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:54,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:54,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:54,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... [2019-11-23 22:15:54,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:54,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:54,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:54,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:54,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:15:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:54,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:15:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:15:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:15:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:15:54,963 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:54,964 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 22:15:54,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:54 BoogieIcfgContainer [2019-11-23 22:15:54,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:54,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:54,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:54,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:54,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:54" (1/3) ... [2019-11-23 22:15:54,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac69cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:54, skipping insertion in model container [2019-11-23 22:15:54,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:54" (2/3) ... [2019-11-23 22:15:54,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac69cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:54, skipping insertion in model container [2019-11-23 22:15:54,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:54" (3/3) ... [2019-11-23 22:15:54,975 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2019-11-23 22:15:54,983 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:54,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:55,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:55,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:55,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:55,020 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:55,020 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:55,020 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:55,021 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:55,021 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:55,021 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-23 22:15:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:15:55,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,039 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,043 INFO L82 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2019-11-23 22:15:55,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461185249] [2019-11-23 22:15:55,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:55,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461185249] [2019-11-23 22:15:55,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:55,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:55,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462092201] [2019-11-23 22:15:55,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:15:55,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:15:55,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:55,209 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-23 22:15:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:55,232 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2019-11-23 22:15:55,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:15:55,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-11-23 22:15:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:55,246 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:15:55,246 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:15:55,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:15:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:15:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:15:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2019-11-23 22:15:55,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2019-11-23 22:15:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:55,285 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2019-11-23 22:15:55,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:15:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2019-11-23 22:15:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:15:55,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,286 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,286 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2019-11-23 22:15:55,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979808842] [2019-11-23 22:15:55,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:55,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979808842] [2019-11-23 22:15:55,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:55,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:15:55,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646066350] [2019-11-23 22:15:55,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:15:55,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:55,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:15:55,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:55,385 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 3 states. [2019-11-23 22:15:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:55,482 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2019-11-23 22:15:55,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:15:55,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 22:15:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:55,485 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:15:55,485 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:15:55,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:15:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2019-11-23 22:15:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:15:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 22:15:55,493 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2019-11-23 22:15:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:55,493 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 22:15:55,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:15:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 22:15:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:15:55,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,495 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:55,495 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2019-11-23 22:15:55,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:55,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443546337] [2019-11-23 22:15:55,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:55,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443546337] [2019-11-23 22:15:55,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561737356] [2019-11-23 22:15:55,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:55,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:15:55,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:15:55,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:15:55,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2019-11-23 22:15:55,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130398973] [2019-11-23 22:15:55,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:15:55,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:15:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:55,742 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-23 22:15:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:55,807 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-11-23 22:15:55,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:55,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 22:15:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:55,811 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:15:55,811 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:15:55,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:15:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-23 22:15:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:15:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-11-23 22:15:55,819 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2019-11-23 22:15:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:55,820 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-11-23 22:15:55,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:15:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-11-23 22:15:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:15:55,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:55,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:56,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,025 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2019-11-23 22:15:56,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:56,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851246741] [2019-11-23 22:15:56,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:56,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851246741] [2019-11-23 22:15:56,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252171511] [2019-11-23 22:15:56,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:56,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:15:56,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:15:56,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-23 22:15:56,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401606963] [2019-11-23 22:15:56,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:56,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:56,259 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 4 states. [2019-11-23 22:15:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:56,327 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2019-11-23 22:15:56,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:56,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 22:15:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:56,328 INFO L225 Difference]: With dead ends: 97 [2019-11-23 22:15:56,329 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:15:56,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:15:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-11-23 22:15:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:15:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2019-11-23 22:15:56,337 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2019-11-23 22:15:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:56,337 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2019-11-23 22:15:56,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2019-11-23 22:15:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:15:56,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:56,341 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:56,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,544 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2019-11-23 22:15:56,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:56,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775446496] [2019-11-23 22:15:56,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:15:56,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775446496] [2019-11-23 22:15:56,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481007440] [2019-11-23 22:15:56,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:56,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:15:56,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:56,753 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 22:15:56,755 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,762 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:56,763 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,763 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-23 22:15:56,835 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-23 22:15:56,836 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,837 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:56,838 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:56,838 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-23 22:15:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:15:56,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:56,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2019-11-23 22:15:56,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001764460] [2019-11-23 22:15:56,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:15:56,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:15:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:56,854 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 11 states. [2019-11-23 22:15:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:57,075 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2019-11-23 22:15:57,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:15:57,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-23 22:15:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:57,079 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:15:57,079 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 22:15:57,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:15:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 22:15:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 42. [2019-11-23 22:15:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:15:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2019-11-23 22:15:57,087 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 24 [2019-11-23 22:15:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:57,087 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2019-11-23 22:15:57,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:15:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2019-11-23 22:15:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:15:57,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:57,089 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:57,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:57,294 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:57,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1684188283, now seen corresponding path program 1 times [2019-11-23 22:15:57,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:57,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490936474] [2019-11-23 22:15:57,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:15:57,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490936474] [2019-11-23 22:15:57,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283580857] [2019-11-23 22:15:57,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:57,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:15:57,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:57,507 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-23 22:15:57,507 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:57,509 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:57,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:57,510 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-23 22:15:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:15:57,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:57,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-11-23 22:15:57,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005256307] [2019-11-23 22:15:57,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:15:57,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:15:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:15:57,526 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 12 states. [2019-11-23 22:15:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:57,846 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2019-11-23 22:15:57,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:15:57,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-23 22:15:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:57,851 INFO L225 Difference]: With dead ends: 158 [2019-11-23 22:15:57,851 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 22:15:57,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:15:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 22:15:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 46. [2019-11-23 22:15:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:15:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2019-11-23 22:15:57,875 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2019-11-23 22:15:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:57,876 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2019-11-23 22:15:57,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:15:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2019-11-23 22:15:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:15:57,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:57,877 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:58,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,082 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash -567721454, now seen corresponding path program 1 times [2019-11-23 22:15:58,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:58,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547386335] [2019-11-23 22:15:58,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:15:58,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547386335] [2019-11-23 22:15:58,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132837060] [2019-11-23 22:15:58,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:15:58,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:15:58,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:58,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-23 22:15:58,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920914699] [2019-11-23 22:15:58,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:15:58,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:15:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:58,283 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 9 states. [2019-11-23 22:15:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:58,561 INFO L93 Difference]: Finished difference Result 282 states and 373 transitions. [2019-11-23 22:15:58,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:15:58,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-23 22:15:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:58,563 INFO L225 Difference]: With dead ends: 282 [2019-11-23 22:15:58,563 INFO L226 Difference]: Without dead ends: 245 [2019-11-23 22:15:58,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:15:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-23 22:15:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 62. [2019-11-23 22:15:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:15:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2019-11-23 22:15:58,579 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 30 [2019-11-23 22:15:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:58,579 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2019-11-23 22:15:58,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:15:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2019-11-23 22:15:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:15:58,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:58,581 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:58,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,784 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1404310353, now seen corresponding path program 2 times [2019-11-23 22:15:58,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:58,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244216386] [2019-11-23 22:15:58,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 22:15:58,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244216386] [2019-11-23 22:15:58,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322964978] [2019-11-23 22:15:58,866 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:58,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:58,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:58,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:15:58,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:59,040 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-11-23 22:15:59,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:15:59,048 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:15:59,048 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:15:59,048 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-11-23 22:15:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:15:59,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:59,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12] total 14 [2019-11-23 22:15:59,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22388723] [2019-11-23 22:15:59,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:15:59,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:15:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:15:59,066 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 14 states. [2019-11-23 22:15:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:59,733 INFO L93 Difference]: Finished difference Result 302 states and 437 transitions. [2019-11-23 22:15:59,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:15:59,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-11-23 22:15:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:59,737 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:15:59,737 INFO L226 Difference]: Without dead ends: 268 [2019-11-23 22:15:59,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:15:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-11-23 22:15:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 105. [2019-11-23 22:15:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:15:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2019-11-23 22:15:59,772 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 34 [2019-11-23 22:15:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:59,773 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2019-11-23 22:15:59,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:15:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2019-11-23 22:15:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:15:59,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:59,782 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:59,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:59,988 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 370373592, now seen corresponding path program 1 times [2019-11-23 22:15:59,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:59,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696907922] [2019-11-23 22:15:59,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:16:00,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696907922] [2019-11-23 22:16:00,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455535269] [2019-11-23 22:16:00,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:00,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:16:00,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:16:00,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:00,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2019-11-23 22:16:00,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312966748] [2019-11-23 22:16:00,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:16:00,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:16:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:16:00,298 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand 14 states. [2019-11-23 22:16:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:02,020 INFO L93 Difference]: Finished difference Result 1036 states and 1331 transitions. [2019-11-23 22:16:02,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:16:02,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-23 22:16:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:02,025 INFO L225 Difference]: With dead ends: 1036 [2019-11-23 22:16:02,025 INFO L226 Difference]: Without dead ends: 932 [2019-11-23 22:16:02,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=2057, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:16:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2019-11-23 22:16:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 175. [2019-11-23 22:16:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 22:16:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 228 transitions. [2019-11-23 22:16:02,055 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 228 transitions. Word has length 44 [2019-11-23 22:16:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:02,055 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 228 transitions. [2019-11-23 22:16:02,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:16:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 228 transitions. [2019-11-23 22:16:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:16:02,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:02,057 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:02,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:02,262 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2019-11-23 22:16:02,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:02,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459810205] [2019-11-23 22:16:02,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:02,925 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2019-11-23 22:16:03,055 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 20 [2019-11-23 22:16:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:16:03,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459810205] [2019-11-23 22:16:03,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950254090] [2019-11-23 22:16:03,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:03,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:16:03,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:03,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:03,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:03,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:03,691 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-11-23 22:16:05,818 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-11-23 22:16:18,027 WARN L192 SmtUtils]: Spent 12.11 s on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2019-11-23 22:16:18,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:18,182 INFO L392 ElimStorePlain]: Different costs {10=[v_prenex_14, |#memory_int|], 18=[v_prenex_9]} [2019-11-23 22:16:18,237 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:16:18,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 118 [2019-11-23 22:16:18,238 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:16:18,296 INFO L567 ElimStorePlain]: treesize reduction 88, result has 50.3 percent of original size [2019-11-23 22:16:18,337 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:16:18,338 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 106 [2019-11-23 22:16:18,339 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:16:18,377 INFO L567 ElimStorePlain]: treesize reduction 48, result has 37.7 percent of original size [2019-11-23 22:16:18,377 INFO L464 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2019-11-23 22:16:18,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:16:18,381 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 18 variables, input treesize:241, output treesize:3 [2019-11-23 22:16:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:16:18,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:16:18,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2019-11-23 22:16:18,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983833116] [2019-11-23 22:16:18,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:16:18,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:16:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:16:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:16:18,438 INFO L87 Difference]: Start difference. First operand 175 states and 228 transitions. Second operand 22 states. [2019-11-23 22:16:27,020 WARN L192 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2019-11-23 22:16:55,568 WARN L192 SmtUtils]: Spent 27.79 s on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2019-11-23 22:16:55,844 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-11-23 22:16:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:16:55,864 INFO L93 Difference]: Finished difference Result 382 states and 507 transitions. [2019-11-23 22:16:55,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:16:55,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2019-11-23 22:16:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:16:55,866 INFO L225 Difference]: With dead ends: 382 [2019-11-23 22:16:55,866 INFO L226 Difference]: Without dead ends: 271 [2019-11-23 22:16:55,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:16:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-11-23 22:16:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 197. [2019-11-23 22:16:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 22:16:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 254 transitions. [2019-11-23 22:16:55,890 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 254 transitions. Word has length 46 [2019-11-23 22:16:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:16:55,890 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 254 transitions. [2019-11-23 22:16:55,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:16:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 254 transitions. [2019-11-23 22:16:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:16:55,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:16:55,891 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:16:56,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:56,104 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:16:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:16:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2019-11-23 22:16:56,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:16:56,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096856666] [2019-11-23 22:16:56,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:16:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:56,533 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 23 [2019-11-23 22:16:56,691 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 33 [2019-11-23 22:16:57,378 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 41 [2019-11-23 22:16:57,586 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 22 [2019-11-23 22:16:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 22:16:57,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096856666] [2019-11-23 22:16:57,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036033541] [2019-11-23 22:16:57,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:16:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:16:57,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:16:57,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:16:57,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:57,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:57,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:58,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:16:58,942 WARN L192 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-23 22:16:59,313 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-11-23 22:17:21,622 WARN L192 SmtUtils]: Spent 22.23 s on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2019-11-23 22:17:21,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:21,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:21,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:21,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:21,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:17:21,743 INFO L392 ElimStorePlain]: Different costs {10=[|#memory_int|], 18=[v_prenex_25]} [2019-11-23 22:17:21,791 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:17:21,791 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 107 [2019-11-23 22:17:21,793 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:17:21,910 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2019-11-23 22:17:21,911 INFO L567 ElimStorePlain]: treesize reduction 95, result has 56.0 percent of original size [2019-11-23 22:17:21,955 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:17:21,956 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 113 [2019-11-23 22:17:21,958 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:17:22,068 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2019-11-23 22:17:22,069 INFO L567 ElimStorePlain]: treesize reduction 6, result has 93.4 percent of original size [2019-11-23 22:17:22,072 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:17:22,073 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:244, output treesize:4 [2019-11-23 22:17:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 22:17:22,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:17:22,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-11-23 22:17:22,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779214195] [2019-11-23 22:17:22,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:17:22,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:17:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:17:22,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:17:22,112 INFO L87 Difference]: Start difference. First operand 197 states and 254 transitions. Second operand 26 states. [2019-11-23 22:17:30,635 WARN L192 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-11-23 22:17:31,781 WARN L192 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-11-23 22:17:33,178 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-23 22:17:33,422 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-23 22:17:34,165 WARN L192 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-11-23 22:17:36,294 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2019-11-23 22:17:36,644 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60