/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/reducercommutativity/sum60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:29:44,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:29:44,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:29:44,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:29:44,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:29:44,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:29:44,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:29:44,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:29:44,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:29:44,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:29:44,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:29:44,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:29:44,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:29:44,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:29:44,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:29:44,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:29:44,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:29:44,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:29:44,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:29:44,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:29:44,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:29:44,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:29:44,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:29:44,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:29:44,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:29:44,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:29:44,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:29:44,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:29:44,987 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 22:29:45,008 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:29:45,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:29:45,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:29:45,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:29:45,010 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:29:45,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:29:45,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:29:45,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:29:45,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:29:45,012 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:29:45,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:29:45,012 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:29:45,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:29:45,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:29:45,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:29:45,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:29:45,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:29:45,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:29:45,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:29:45,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:29:45,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:29:45,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:29:45,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:29:45,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:29:45,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:29:45,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:29:45,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:29:45,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:29:45,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:29:45,292 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:29:45,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-23 22:29:45,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80fcf79d/b837682ec0374afd8483b6e5ade4f6da/FLAG2465b712f [2019-11-23 22:29:45,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:29:45,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-23 22:29:45,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80fcf79d/b837682ec0374afd8483b6e5ade4f6da/FLAG2465b712f [2019-11-23 22:29:46,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80fcf79d/b837682ec0374afd8483b6e5ade4f6da [2019-11-23 22:29:46,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:29:46,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:29:46,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:46,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:29:46,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:29:46,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198c64ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:29:46,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:29:46,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:46,416 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:29:46,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:46,454 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:29:46,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46 WrapperNode [2019-11-23 22:29:46,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:46,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:46,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:29:46,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:29:46,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:46,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:29:46,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:29:46,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:29:46,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (1/1) ... [2019-11-23 22:29:46,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:29:46,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:29:46,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:29:46,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:29:46,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (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 22:29:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:29:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:29:46,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:29:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:29:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:29:46,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:29:46,970 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:29:46,970 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:29:46,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46 BoogieIcfgContainer [2019-11-23 22:29:46,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:29:46,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:29:46,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:29:46,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:29:46,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:46" (1/3) ... [2019-11-23 22:29:46,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:46" (2/3) ... [2019-11-23 22:29:46,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c09620c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:46, skipping insertion in model container [2019-11-23 22:29:46,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:46" (3/3) ... [2019-11-23 22:29:46,980 INFO L109 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2019-11-23 22:29:46,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:29:46,997 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:29:47,014 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:29:47,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:29:47,062 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:29:47,063 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:29:47,063 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:29:47,063 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:29:47,063 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:29:47,063 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:29:47,063 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:29:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:29:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:29:47,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,088 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 22:29:47,088 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:29:47,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100064375] [2019-11-23 22:29:47,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,256 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 22:29:47,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100064375] [2019-11-23 22:29:47,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:47,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:47,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510120203] [2019-11-23 22:29:47,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:47,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,289 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:29:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,340 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:29:47,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:47,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:29:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,355 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:29:47,355 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:29:47,359 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 22:29:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:29:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:29:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:29:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:29:47,394 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:29:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,395 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:29:47,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:29:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:29:47,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,397 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:29:47,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84846992] [2019-11-23 22:29:47,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,472 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 22:29:47,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84846992] [2019-11-23 22:29:47,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:47,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:47,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673176952] [2019-11-23 22:29:47,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:47,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:47,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,477 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:29:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,519 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:29:47,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:47,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:29:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,521 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:29:47,521 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:29:47,522 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 22:29:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:29:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:29:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:29:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:29:47,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:29:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,529 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:29:47,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:29:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:29:47,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,531 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, 1, 1] [2019-11-23 22:29:47,531 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:29:47,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181589751] [2019-11-23 22:29:47,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181589751] [2019-11-23 22:29:47,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:47,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:47,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807368120] [2019-11-23 22:29:47,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:47,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:47,621 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:29:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,636 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:29:47,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:47,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:29:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,638 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:29:47,638 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:29:47,639 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 22:29:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:29:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:29:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:29:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:29:47,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:29:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,646 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:29:47,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:29:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:29:47,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,647 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, 1, 1, 1, 1] [2019-11-23 22:29:47,647 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:29:47,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490731260] [2019-11-23 22:29:47,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490731260] [2019-11-23 22:29:47,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674722130] [2019-11-23 22:29:47,726 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 22:29:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:47,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:29:47,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616029814] [2019-11-23 22:29:47,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:29:47,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:29:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:47,870 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:29:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,903 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:29:47,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:29:47,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:29:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,904 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:29:47,905 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:29:47,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:29:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:29:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:29:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:29:47,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:29:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,919 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:29:47,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:29:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:29:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:29:47,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,923 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 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 22:29:48,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,129 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:29:48,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38979194] [2019-11-23 22:29:48,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,231 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 22:29:48,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38979194] [2019-11-23 22:29:48,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028112113] [2019-11-23 22:29:48,233 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:48,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:48,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:29:48,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611168330] [2019-11-23 22:29:48,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:48,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:48,339 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:29:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,391 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:29:48,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:48,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:29:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,394 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:29:48,394 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:29:48,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:29:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:29:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:29:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:29:48,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:29:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,401 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:29:48,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:29:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:29:48,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,402 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, 1, 1, 1] [2019-11-23 22:29:48,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,603 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:29:48,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144839336] [2019-11-23 22:29:48,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:48,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144839336] [2019-11-23 22:29:48,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748018638] [2019-11-23 22:29:48,682 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:29:48,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:29:48,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:29:48,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141482040] [2019-11-23 22:29:48,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:48,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:48,765 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:29:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,877 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:29:48,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:29:48,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:29:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,878 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:29:48,878 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:29:48,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:29:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:29:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:29:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:29:48,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:29:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,893 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:29:48,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:29:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:29:48,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,897 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] [2019-11-23 22:29:49,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,098 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:29:49,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319309732] [2019-11-23 22:29:49,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:29:49,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319309732] [2019-11-23 22:29:49,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768917476] [2019-11-23 22:29:49,209 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 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 22:29:49,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:49,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:29:49,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:29:49,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129907607] [2019-11-23 22:29:49,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:29:49,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:29:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:49,299 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:29:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,425 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:29:49,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:49,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:29:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,428 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:29:49,428 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:29:49,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:29:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:29:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:29:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:29:49,439 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:29:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,439 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:29:49,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:29:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:29:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:29:49,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,444 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,644 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:29:49,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274658249] [2019-11-23 22:29:49,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:29:49,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274658249] [2019-11-23 22:29:49,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072550144] [2019-11-23 22:29:49,754 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 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 22:29:49,843 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:29:49,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:29:49,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:29:49,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085667147] [2019-11-23 22:29:49,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:49,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:49,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,920 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:29:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,033 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:29:50,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:50,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:29:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,034 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:29:50,034 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:29:50,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:29:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:29:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:29:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:29:50,044 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:29:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,045 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:29:50,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:29:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:29:50,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,046 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,250 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:29:50,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707102137] [2019-11-23 22:29:50,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:29:50,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707102137] [2019-11-23 22:29:50,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737404614] [2019-11-23 22:29:50,366 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 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 22:29:50,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:29:50,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:50,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:29:50,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:29:50,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766914464] [2019-11-23 22:29:50,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:50,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:50,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,498 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:29:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,558 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:29:50,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:50,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:29:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,559 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:29:50,560 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:29:50,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:29:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:29:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:29:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:29:50,571 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:29:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,573 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:29:50,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:29:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:29:50,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,574 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,776 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:29:50,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255146049] [2019-11-23 22:29:50,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:50,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255146049] [2019-11-23 22:29:50,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941084040] [2019-11-23 22:29:50,911 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 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 22:29:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:29:51,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527267185] [2019-11-23 22:29:51,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:51,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:51,031 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:29:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,073 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:29:51,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:51,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:29:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,074 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:29:51,074 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:29:51,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:29:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:29:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:29:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:29:51,087 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:29:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,098 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:29:51,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:29:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:29:51,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,104 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,309 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:29:51,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523738327] [2019-11-23 22:29:51,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523738327] [2019-11-23 22:29:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993392551] [2019-11-23 22:29:51,433 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:51,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:29:51,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285559533] [2019-11-23 22:29:51,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:51,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:51,527 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:29:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,560 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:29:51,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:51,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:29:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,562 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:29:51,562 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:29:51,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:29:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:29:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:29:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:29:51,574 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:29:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,575 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:29:51,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:29:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:29:51,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,576 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,779 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:29:51,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258786155] [2019-11-23 22:29:51,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:51,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258786155] [2019-11-23 22:29:51,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000043687] [2019-11-23 22:29:51,893 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 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 22:29:51,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:29:51,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:29:52,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:52,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:29:52,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418475054] [2019-11-23 22:29:52,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:29:52,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:29:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:52,032 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:29:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,102 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:29:52,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:52,103 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:29:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,104 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:29:52,104 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:29:52,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:29:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:29:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:29:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:29:52,120 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:29:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,121 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:29:52,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:29:52,121 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:29:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:29:52,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,122 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,326 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:29:52,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775233801] [2019-11-23 22:29:52,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775233801] [2019-11-23 22:29:52,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684304211] [2019-11-23 22:29:52,467 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 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 22:29:52,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:52,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:52,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:29:52,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:52,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:29:52,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243398467] [2019-11-23 22:29:52,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:29:52,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:29:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:52,553 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:29:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,591 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:29:52,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:29:52,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:29:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,592 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:29:52,592 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:29:52,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:29:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:29:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:29:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:29:52,597 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:29:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,598 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:29:52,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:29:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:29:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:29:52,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,598 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,802 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:29:52,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985594856] [2019-11-23 22:29:52,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:29:52,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985594856] [2019-11-23 22:29:52,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679901821] [2019-11-23 22:29:52,954 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 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 22:29:53,435 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:29:53,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:53,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:53,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:29:53,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:53,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 22:29:53,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409392428] [2019-11-23 22:29:53,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:29:53,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:29:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:53,505 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 22:29:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:53,635 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 22:29:53,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:29:53,636 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 22:29:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:53,637 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:29:53,637 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:29:53,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:29:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:29:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 22:29:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:29:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:29:53,650 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 22:29:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:53,650 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:29:53,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:29:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:29:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:29:53,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:53,652 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:53,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,854 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 22:29:53,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:53,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186122932] [2019-11-23 22:29:53,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 22:29:54,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186122932] [2019-11-23 22:29:54,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39280205] [2019-11-23 22:29:54,024 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 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 22:29:54,260 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:29:54,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:54,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:54,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:29:54,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:29:54,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25944015] [2019-11-23 22:29:54,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:29:54,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:29:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:54,350 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 22:29:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,417 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 22:29:54,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:29:54,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 22:29:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,418 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:29:54,418 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:29:54,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:29:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:29:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 22:29:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:29:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 22:29:54,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 22:29:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,423 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 22:29:54,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:29:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 22:29:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:29:54,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,425 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:54,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:54,629 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 22:29:54,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:54,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259338528] [2019-11-23 22:29:54,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259338528] [2019-11-23 22:29:54,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453161474] [2019-11-23 22:29:54,799 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 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 22:29:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:54,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:29:54,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:54,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:54,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:29:54,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141199709] [2019-11-23 22:29:54,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:29:54,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:54,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:29:54,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:54,897 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 22:29:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:54,962 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 22:29:54,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:54,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:29:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:54,964 INFO L225 Difference]: With dead ends: 142 [2019-11-23 22:29:54,964 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:29:54,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:29:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:29:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:29:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:29:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:29:54,968 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 22:29:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:54,969 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:29:54,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:29:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:29:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:29:54,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:54,970 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:55,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,174 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 22:29:55,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:55,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474305055] [2019-11-23 22:29:55,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474305055] [2019-11-23 22:29:55,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037406632] [2019-11-23 22:29:55,349 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 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 22:29:55,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:55,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:55,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:29:55,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262191740] [2019-11-23 22:29:55,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:55,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:55,450 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:29:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:55,502 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 22:29:55,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:29:55,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:29:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:55,504 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:29:55,504 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:29:55,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:29:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 22:29:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:29:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:29:55,509 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 22:29:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:55,509 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:29:55,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:29:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:29:55,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:55,511 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:55,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:55,715 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 22:29:55,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:55,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699901431] [2019-11-23 22:29:55,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:29:55,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699901431] [2019-11-23 22:29:55,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413839637] [2019-11-23 22:29:55,889 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 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 22:29:55,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:29:55,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:55,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:55,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:29:56,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:56,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:29:56,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821964850] [2019-11-23 22:29:56,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:29:56,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:29:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:56,104 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 22:29:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:56,206 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 22:29:56,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:29:56,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 22:29:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:56,211 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:29:56,211 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:29:56,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:29:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:29:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 22:29:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:29:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:29:56,215 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 22:29:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:56,216 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:29:56,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:29:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:29:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:29:56,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:56,217 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:56,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:56,420 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 22:29:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:56,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717361665] [2019-11-23 22:29:56,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:29:56,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717361665] [2019-11-23 22:29:56,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265156046] [2019-11-23 22:29:56,618 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 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 22:29:56,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:56,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:56,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:56,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 22:29:56,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:56,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 22:29:56,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432118742] [2019-11-23 22:29:56,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:29:56,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:29:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:56,796 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 22:29:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:57,015 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 22:29:57,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:29:57,015 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 22:29:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:57,016 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:29:57,016 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:29:57,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:29:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 22:29:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:29:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:29:57,021 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 22:29:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:57,021 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:29:57,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:29:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:29:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:29:57,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:57,022 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:57,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:57,225 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 22:29:57,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:57,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870422902] [2019-11-23 22:29:57,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:29:57,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870422902] [2019-11-23 22:29:57,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95453475] [2019-11-23 22:29:57,436 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 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 22:29:58,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:29:58,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:58,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:29:58,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 22:29:58,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:58,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 22:29:58,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495569534] [2019-11-23 22:29:58,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:29:58,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:29:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:58,220 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 22:29:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:58,443 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 22:29:58,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:29:58,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 22:29:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:58,453 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:29:58,453 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:29:58,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:29:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:29:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 22:29:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:29:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:29:58,458 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 22:29:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:58,458 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:29:58,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:29:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:29:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:29:58,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:58,459 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:58,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:58,664 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 22:29:58,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:58,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935763354] [2019-11-23 22:29:58,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:29:58,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935763354] [2019-11-23 22:29:58,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78501563] [2019-11-23 22:29:58,920 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 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 22:29:59,672 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:29:59,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:59,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:29:59,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:29:59,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:59,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 22:29:59,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977624901] [2019-11-23 22:29:59,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:29:59,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:29:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:59,811 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 22:29:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:59,896 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 22:29:59,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:29:59,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 22:29:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:59,900 INFO L225 Difference]: With dead ends: 183 [2019-11-23 22:29:59,900 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:29:59,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:29:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:29:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 22:29:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:29:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:29:59,905 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 22:29:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:59,906 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:29:59,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:29:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:29:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:29:59,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:59,907 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:00,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,112 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 22:30:00,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:00,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629574900] [2019-11-23 22:30:00,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629574900] [2019-11-23 22:30:00,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059016181] [2019-11-23 22:30:00,364 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:00,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:30:00,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:00,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:30:00,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59100089] [2019-11-23 22:30:00,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:30:00,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:30:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:00,485 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 22:30:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:00,552 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 22:30:00,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:30:00,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 22:30:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:00,555 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:30:00,555 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:30:00,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:30:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:30:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:30:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:30:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:30:00,560 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:30:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:00,561 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:30:00,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:30:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:30:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:30:00,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:00,562 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:00,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:00,765 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 22:30:00,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:00,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263215033] [2019-11-23 22:30:00,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:01,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263215033] [2019-11-23 22:30:01,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444711847] [2019-11-23 22:30:01,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:01,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:01,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:30:01,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:01,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:01,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:30:01,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131199208] [2019-11-23 22:30:01,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:30:01,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:30:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:01,152 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 22:30:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:01,233 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 22:30:01,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:30:01,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 22:30:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:01,234 INFO L225 Difference]: With dead ends: 188 [2019-11-23 22:30:01,234 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:30:01,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:30:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:30:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:30:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:30:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 22:30:01,239 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 22:30:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:01,240 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 22:30:01,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:30:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 22:30:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:30:01,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:01,242 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:01,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,448 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 22:30:01,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:01,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40514396] [2019-11-23 22:30:01,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:30:01,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40514396] [2019-11-23 22:30:01,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445011933] [2019-11-23 22:30:01,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:01,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:30:01,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:01,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:30:01,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:30:02,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:02,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 22:30:02,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465007585] [2019-11-23 22:30:02,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:30:02,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:30:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:30:02,140 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 35 states. [2019-11-23 22:30:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:03,259 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 22:30:03,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:30:03,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2019-11-23 22:30:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:03,261 INFO L225 Difference]: With dead ends: 200 [2019-11-23 22:30:03,261 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:30:03,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:30:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:30:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-23 22:30:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:30:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 22:30:03,270 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2019-11-23 22:30:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:03,270 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 22:30:03,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:30:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 22:30:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:30:03,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:03,272 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:03,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:03,476 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 22 times [2019-11-23 22:30:03,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:03,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989432891] [2019-11-23 22:30:03,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:03,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989432891] [2019-11-23 22:30:03,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710531050] [2019-11-23 22:30:03,821 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 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 22:30:03,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:03,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:03,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:30:03,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:03,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:03,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:30:03,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474642786] [2019-11-23 22:30:03,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:30:03,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:03,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:30:03,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:03,953 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2019-11-23 22:30:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:04,029 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-11-23 22:30:04,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:30:04,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-11-23 22:30:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:04,030 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:30:04,030 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:30:04,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:30:04,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:30:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 22:30:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:30:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 22:30:04,036 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2019-11-23 22:30:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:04,037 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 22:30:04,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:30:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 22:30:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:30:04,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:04,038 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:04,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:04,242 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:04,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 23 times [2019-11-23 22:30:04,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:04,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369523762] [2019-11-23 22:30:04,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:04,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369523762] [2019-11-23 22:30:04,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935490997] [2019-11-23 22:30:04,574 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 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 22:30:06,277 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:30:06,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:06,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:30:06,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:06,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:06,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:30:06,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585328595] [2019-11-23 22:30:06,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:30:06,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:30:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:30:06,325 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2019-11-23 22:30:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:06,419 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-11-23 22:30:06,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:30:06,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-11-23 22:30:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:06,420 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:30:06,420 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:30:06,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:30:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:30:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 22:30:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 22:30:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2019-11-23 22:30:06,426 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2019-11-23 22:30:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:06,427 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2019-11-23 22:30:06,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:30:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2019-11-23 22:30:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 22:30:06,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:06,428 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:06,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:06,634 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 24 times [2019-11-23 22:30:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:06,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198121493] [2019-11-23 22:30:06,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:30:07,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198121493] [2019-11-23 22:30:07,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712287289] [2019-11-23 22:30:07,175 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 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 22:30:07,813 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:30:07,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:07,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:30:07,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-11-23 22:30:07,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:07,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-23 22:30:07,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419809976] [2019-11-23 22:30:07,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:30:07,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:30:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:07,947 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2019-11-23 22:30:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:08,079 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2019-11-23 22:30:08,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:30:08,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2019-11-23 22:30:08,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:08,080 INFO L225 Difference]: With dead ends: 213 [2019-11-23 22:30:08,080 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 22:30:08,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 22:30:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-11-23 22:30:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 22:30:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 22:30:08,084 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2019-11-23 22:30:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:08,084 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 22:30:08,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:30:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 22:30:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 22:30:08,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:08,085 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:08,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:08,286 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 25 times [2019-11-23 22:30:08,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:08,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404577176] [2019-11-23 22:30:08,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:08,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404577176] [2019-11-23 22:30:08,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878064047] [2019-11-23 22:30:08,829 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 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 22:30:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:08,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:30:08,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:08,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:08,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:30:08,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596199888] [2019-11-23 22:30:08,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:30:08,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:08,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:30:08,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:30:08,955 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2019-11-23 22:30:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:09,043 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 22:30:09,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:30:09,043 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2019-11-23 22:30:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:09,044 INFO L225 Difference]: With dead ends: 216 [2019-11-23 22:30:09,044 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:30:09,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:30:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:30:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 22:30:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:30:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 22:30:09,050 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 22:30:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:09,050 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 22:30:09,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:30:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 22:30:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:30:09,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:09,052 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:09,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:09,256 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 26 times [2019-11-23 22:30:09,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:09,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358867666] [2019-11-23 22:30:09,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:09,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358867666] [2019-11-23 22:30:09,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193148941] [2019-11-23 22:30:09,905 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 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 22:30:10,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:10,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:10,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:30:10,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:10,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:10,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:30:10,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180660365] [2019-11-23 22:30:10,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:30:10,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:30:10,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:30:10,057 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2019-11-23 22:30:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:10,148 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2019-11-23 22:30:10,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:30:10,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2019-11-23 22:30:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:10,149 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:30:10,149 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:30:10,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:30:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:30:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:30:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:30:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 22:30:10,157 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 22:30:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:10,157 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 22:30:10,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:30:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 22:30:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:30:10,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:10,159 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:10,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:10,363 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 27 times [2019-11-23 22:30:10,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:10,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730712074] [2019-11-23 22:30:10,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:30:10,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730712074] [2019-11-23 22:30:10,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628131552] [2019-11-23 22:30:10,892 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 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 22:30:11,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:30:11,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:11,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:11,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2019-11-23 22:30:11,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:11,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-23 22:30:11,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539353566] [2019-11-23 22:30:11,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:30:11,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:30:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:30:11,211 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2019-11-23 22:30:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:11,533 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2019-11-23 22:30:11,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:30:11,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2019-11-23 22:30:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:11,535 INFO L225 Difference]: With dead ends: 229 [2019-11-23 22:30:11,535 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 22:30:11,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:30:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 22:30:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2019-11-23 22:30:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:30:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 22:30:11,542 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2019-11-23 22:30:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:11,543 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 22:30:11,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:30:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 22:30:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:30:11,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:11,544 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:11,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:11,749 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash -870144824, now seen corresponding path program 28 times [2019-11-23 22:30:11,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:11,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292093530] [2019-11-23 22:30:11,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:12,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292093530] [2019-11-23 22:30:12,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010412189] [2019-11-23 22:30:12,350 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 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 22:30:12,443 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:12,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:12,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:30:12,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:12,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:12,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:30:12,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281353336] [2019-11-23 22:30:12,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:30:12,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:30:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:30:12,476 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 33 states. [2019-11-23 22:30:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:12,592 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2019-11-23 22:30:12,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:30:12,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2019-11-23 22:30:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:12,593 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:30:12,594 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 22:30:12,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:30:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 22:30:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 22:30:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 22:30:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 22:30:12,600 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 22:30:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:12,600 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 22:30:12,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:30:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 22:30:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 22:30:12,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:12,602 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:12,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:12,805 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash 922342406, now seen corresponding path program 29 times [2019-11-23 22:30:12,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:12,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557817440] [2019-11-23 22:30:12,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:30:13,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557817440] [2019-11-23 22:30:13,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015378580] [2019-11-23 22:30:13,423 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 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 22:30:20,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 22:30:20,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:20,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:30:20,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2019-11-23 22:30:20,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:20,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 22:30:20,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100787805] [2019-11-23 22:30:20,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:30:20,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:30:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:20,960 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 43 states. [2019-11-23 22:30:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:21,321 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2019-11-23 22:30:21,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:30:21,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2019-11-23 22:30:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:21,322 INFO L225 Difference]: With dead ends: 245 [2019-11-23 22:30:21,323 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 22:30:21,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 22:30:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 22:30:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:30:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 22:30:21,329 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 22:30:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:21,330 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 22:30:21,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:30:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 22:30:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:30:21,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:21,331 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:21,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:21,539 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -907854910, now seen corresponding path program 30 times [2019-11-23 22:30:21,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:21,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619533017] [2019-11-23 22:30:21,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 22:30:22,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619533017] [2019-11-23 22:30:22,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988910463] [2019-11-23 22:30:22,014 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:22,844 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:30:22,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:22,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:30:22,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2019-11-23 22:30:23,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:23,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-23 22:30:23,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221403423] [2019-11-23 22:30:23,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:30:23,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:30:23,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:23,020 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 22:30:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:23,254 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2019-11-23 22:30:23,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:30:23,255 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 22:30:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:23,256 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:30:23,256 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 22:30:23,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 22:30:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 22:30:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:30:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 22:30:23,263 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 22:30:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:23,264 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 22:30:23,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:30:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 22:30:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:30:23,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:23,265 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:23,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:23,470 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 31 times [2019-11-23 22:30:23,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:23,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970731315] [2019-11-23 22:30:23,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:23,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970731315] [2019-11-23 22:30:23,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866211033] [2019-11-23 22:30:23,953 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:24,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:30:24,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:24,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:24,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:30:24,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719503009] [2019-11-23 22:30:24,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:30:24,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:30:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:24,100 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2019-11-23 22:30:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:24,236 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2019-11-23 22:30:24,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:30:24,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2019-11-23 22:30:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:24,238 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:30:24,238 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:30:24,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:30:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:30:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 22:30:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 22:30:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 22:30:24,247 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 22:30:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:24,247 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 22:30:24,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:30:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 22:30:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 22:30:24,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:24,249 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:24,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:24,453 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 32 times [2019-11-23 22:30:24,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:24,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640320628] [2019-11-23 22:30:24,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:24,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640320628] [2019-11-23 22:30:24,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79283001] [2019-11-23 22:30:24,972 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:25,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:25,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:25,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:30:25,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:25,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:25,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:30:25,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075491163] [2019-11-23 22:30:25,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:30:25,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:25,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:30:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:25,103 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 37 states. [2019-11-23 22:30:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:25,249 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 22:30:25,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:30:25,250 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2019-11-23 22:30:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:25,251 INFO L225 Difference]: With dead ends: 258 [2019-11-23 22:30:25,252 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 22:30:25,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:30:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 22:30:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 22:30:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:30:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 22:30:25,260 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 22:30:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:25,261 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 22:30:25,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:30:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 22:30:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:30:25,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:25,263 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:25,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:25,468 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1569164806, now seen corresponding path program 33 times [2019-11-23 22:30:25,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:25,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838953390] [2019-11-23 22:30:25,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:30:26,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838953390] [2019-11-23 22:30:26,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538300259] [2019-11-23 22:30:26,043 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:26,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:30:26,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:26,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:30:26,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2019-11-23 22:30:26,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:26,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2019-11-23 22:30:26,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842221711] [2019-11-23 22:30:26,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:30:26,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:30:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:30:26,527 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 22:30:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:26,749 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2019-11-23 22:30:26,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:30:26,750 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 22:30:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:26,751 INFO L225 Difference]: With dead ends: 263 [2019-11-23 22:30:26,751 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 22:30:26,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:30:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 22:30:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2019-11-23 22:30:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-11-23 22:30:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2019-11-23 22:30:26,756 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 163 [2019-11-23 22:30:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:26,756 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2019-11-23 22:30:26,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:30:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2019-11-23 22:30:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-23 22:30:26,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:26,757 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:26,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:26,961 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash -338674122, now seen corresponding path program 34 times [2019-11-23 22:30:26,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:26,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996017368] [2019-11-23 22:30:26,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:30:27,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996017368] [2019-11-23 22:30:27,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911501926] [2019-11-23 22:30:27,670 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:27,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:30:27,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:27,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:30:27,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 22:30:28,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:28,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2019-11-23 22:30:28,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240012001] [2019-11-23 22:30:28,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:30:28,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:30:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:30:28,010 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 49 states. [2019-11-23 22:30:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:28,310 INFO L93 Difference]: Finished difference Result 275 states and 286 transitions. [2019-11-23 22:30:28,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:30:28,310 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 167 [2019-11-23 22:30:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:28,311 INFO L225 Difference]: With dead ends: 275 [2019-11-23 22:30:28,311 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 22:30:28,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:30:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 22:30:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-11-23 22:30:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 22:30:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2019-11-23 22:30:28,319 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2019-11-23 22:30:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:28,319 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2019-11-23 22:30:28,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:30:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2019-11-23 22:30:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:30:28,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:28,320 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:28,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:28,524 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 35 times [2019-11-23 22:30:28,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:28,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798929779] [2019-11-23 22:30:28,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 22:30:29,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798929779] [2019-11-23 22:30:29,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360682659] [2019-11-23 22:30:29,110 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:52,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-11-23 22:30:52,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:52,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:30:52,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2019-11-23 22:30:52,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:52,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 14] total 51 [2019-11-23 22:30:52,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216687378] [2019-11-23 22:30:52,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:30:52,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:30:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:30:52,701 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 51 states. [2019-11-23 22:30:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:53,109 INFO L93 Difference]: Finished difference Result 289 states and 300 transitions. [2019-11-23 22:30:53,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:30:53,109 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2019-11-23 22:30:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:53,111 INFO L225 Difference]: With dead ends: 289 [2019-11-23 22:30:53,111 INFO L226 Difference]: Without dead ends: 188 [2019-11-23 22:30:53,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:30:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-23 22:30:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2019-11-23 22:30:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:30:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2019-11-23 22:30:53,119 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2019-11-23 22:30:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:53,120 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2019-11-23 22:30:53,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:30:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2019-11-23 22:30:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:30:53,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:53,121 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:53,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:53,334 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 36 times [2019-11-23 22:30:53,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:53,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547079211] [2019-11-23 22:30:53,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 22:30:53,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547079211] [2019-11-23 22:30:53,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036352455] [2019-11-23 22:30:53,983 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:55,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:30:55,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:55,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:30:55,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2019-11-23 22:30:55,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:55,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2019-11-23 22:30:55,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264254901] [2019-11-23 22:30:55,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:30:55,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:55,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:30:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:30:55,675 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 51 states. [2019-11-23 22:30:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:55,965 INFO L93 Difference]: Finished difference Result 297 states and 306 transitions. [2019-11-23 22:30:55,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:30:55,965 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 183 [2019-11-23 22:30:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:55,967 INFO L225 Difference]: With dead ends: 297 [2019-11-23 22:30:55,967 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 22:30:55,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:30:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 22:30:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2019-11-23 22:30:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:30:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 22:30:55,978 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 183 [2019-11-23 22:30:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:55,978 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 22:30:55,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:30:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 22:30:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:30:55,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:55,981 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:56,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:56,189 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 611628266, now seen corresponding path program 37 times [2019-11-23 22:30:56,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:56,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421457987] [2019-11-23 22:30:56,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:30:56,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421457987] [2019-11-23 22:30:56,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693332793] [2019-11-23 22:30:56,948 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:57,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:30:57,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:30:57,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:57,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:30:57,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335589928] [2019-11-23 22:30:57,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:30:57,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:30:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:30:57,118 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 42 states. [2019-11-23 22:30:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:57,277 INFO L93 Difference]: Finished difference Result 300 states and 308 transitions. [2019-11-23 22:30:57,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:30:57,278 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 187 [2019-11-23 22:30:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:57,280 INFO L225 Difference]: With dead ends: 300 [2019-11-23 22:30:57,280 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:30:57,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:30:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:30:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 22:30:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 22:30:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2019-11-23 22:30:57,289 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2019-11-23 22:30:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:57,290 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2019-11-23 22:30:57,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:30:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2019-11-23 22:30:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 22:30:57,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:57,292 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:57,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:57,497 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 38 times [2019-11-23 22:30:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:57,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202500304] [2019-11-23 22:30:57,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:30:58,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202500304] [2019-11-23 22:30:58,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685637716] [2019-11-23 22:30:58,296 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:58,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:30:58,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:30:58,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:30:58,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:30:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:30:58,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:30:58,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 22:30:58,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660268956] [2019-11-23 22:30:58,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:30:58,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:30:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:30:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:58,444 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 43 states. [2019-11-23 22:30:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:30:58,590 INFO L93 Difference]: Finished difference Result 302 states and 310 transitions. [2019-11-23 22:30:58,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:30:58,590 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 189 [2019-11-23 22:30:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:30:58,591 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:30:58,591 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 22:30:58,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:30:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 22:30:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-23 22:30:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:30:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 22:30:58,597 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2019-11-23 22:30:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:30:58,597 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 22:30:58,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:30:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 22:30:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:30:58,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:30:58,598 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:30:58,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:30:58,800 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:30:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:30:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1454751974, now seen corresponding path program 39 times [2019-11-23 22:30:58,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:30:58,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966670472] [2019-11-23 22:30:58,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:30:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:30:59,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966670472] [2019-11-23 22:30:59,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764074467] [2019-11-23 22:30:59,875 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:00,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:31:00,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:31:00,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:31:00,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:31:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2019-11-23 22:31:00,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:31:00,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2019-11-23 22:31:00,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540627886] [2019-11-23 22:31:00,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:31:00,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:31:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:31:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:31:00,460 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 55 states. [2019-11-23 22:31:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:31:00,742 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 22:31:00,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:31:00,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 191 [2019-11-23 22:31:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:31:00,744 INFO L225 Difference]: With dead ends: 307 [2019-11-23 22:31:00,744 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 22:31:00,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:31:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 22:31:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2019-11-23 22:31:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 22:31:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 22:31:00,753 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 191 [2019-11-23 22:31:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:31:00,754 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 22:31:00,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:31:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 22:31:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 22:31:00,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:31:00,756 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:31:00,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:00,962 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:31:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:31:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1338423586, now seen corresponding path program 40 times [2019-11-23 22:31:00,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:31:00,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105193172] [2019-11-23 22:31:00,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:31:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:31:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 22:31:01,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105193172] [2019-11-23 22:31:01,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896204268] [2019-11-23 22:31:01,934 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:02,047 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:31:02,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:31:02,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:31:02,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:31:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2019-11-23 22:31:02,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:31:02,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2019-11-23 22:31:02,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803795682] [2019-11-23 22:31:02,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:31:02,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:31:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:31:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:31:02,353 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 57 states. [2019-11-23 22:31:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:31:02,670 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2019-11-23 22:31:02,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 22:31:02,671 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 195 [2019-11-23 22:31:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:31:02,672 INFO L225 Difference]: With dead ends: 313 [2019-11-23 22:31:02,672 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 22:31:02,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:31:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 22:31:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 22:31:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:31:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 22:31:02,684 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 22:31:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:31:02,687 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 22:31:02,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 22:31:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 22:31:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:31:02,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:31:02,690 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:31:02,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:31:02,894 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:31:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:31:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash -651246754, now seen corresponding path program 41 times [2019-11-23 22:31:02,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:31:02,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151476536] [2019-11-23 22:31:02,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:31:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:31:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2019-11-23 22:31:03,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151476536] [2019-11-23 22:31:03,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716977043] [2019-11-23 22:31:03,998 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true