/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:15:15,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:15:15,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:15:15,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:15:15,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:15:15,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:15:15,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:15:15,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:15:15,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:15:15,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:15:15,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:15:15,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:15:15,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:15:15,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:15:15,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:15:15,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:15:15,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:15:15,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:15:15,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:15:15,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:15:15,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:15:15,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:15:15,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:15:15,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:15:15,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:15:15,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:15:15,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:15:15,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:15:15,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:15:15,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:15:15,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:15:15,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:15:15,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:15:15,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:15:15,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:15:15,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:15:15,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:15:15,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:15:15,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:15:15,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:15:15,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:15:15,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:15:15,328 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:15:15,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:15:15,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:15:15,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:15:15,333 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:15:15,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:15:15,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:15:15,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:15:15,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:15:15,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:15:15,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:15:15,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:15:15,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:15:15,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:15:15,336 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:15:15,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:15:15,337 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:15:15,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:15:15,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:15:15,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:15:15,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:15:15,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:15:15,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:15,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:15:15,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:15:15,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:15:15,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:15:15,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:15:15,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:15:15,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:15:15,614 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:15:15,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:15:15,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:15:15,639 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:15:15,639 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:15:15,640 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum5.c [2019-11-23 20:15:15,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2c80e2/a4fcbcb64bd24c6a967fbac1e55cd1ba/FLAG8ca86fae3 [2019-11-23 20:15:16,143 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:15:16,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum5.c [2019-11-23 20:15:16,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2c80e2/a4fcbcb64bd24c6a967fbac1e55cd1ba/FLAG8ca86fae3 [2019-11-23 20:15:16,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9b2c80e2/a4fcbcb64bd24c6a967fbac1e55cd1ba [2019-11-23 20:15:16,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:15:16,576 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:15:16,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:16,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:15:16,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:15:16,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:16,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547409a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16, skipping insertion in model container [2019-11-23 20:15:16,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:16,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:15:16,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:15:16,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:16,821 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:15:16,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:16,865 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:15:16,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16 WrapperNode [2019-11-23 20:15:16,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:16,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:16,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:15:16,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:15:16,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:16,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:17,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:15:17,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:15:17,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:15:17,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... [2019-11-23 20:15:17,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:15:17,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:15:17,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:15:17,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:15:17,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:15:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:15:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:15:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:15:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:15:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:15:17,423 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:15:17,423 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 20:15:17,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:17 BoogieIcfgContainer [2019-11-23 20:15:17,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:15:17,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:15:17,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:15:17,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:15:17,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:15:16" (1/3) ... [2019-11-23 20:15:17,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf034fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:17, skipping insertion in model container [2019-11-23 20:15:17,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:16" (2/3) ... [2019-11-23 20:15:17,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf034fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:17, skipping insertion in model container [2019-11-23 20:15:17,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:17" (3/3) ... [2019-11-23 20:15:17,433 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2019-11-23 20:15:17,443 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:15:17,450 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:15:17,481 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:15:17,508 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:15:17,509 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:15:17,509 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:15:17,509 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:15:17,509 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:15:17,509 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:15:17,509 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:15:17,509 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:15:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-23 20:15:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:17,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:17,531 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, 1, 1] [2019-11-23 20:15:17,532 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-23 20:15:17,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:17,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696182477] [2019-11-23 20:15:17,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:17,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696182477] [2019-11-23 20:15:17,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:17,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:15:17,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399390894] [2019-11-23 20:15:17,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:15:17,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:15:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:17,695 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-23 20:15:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:17,720 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2019-11-23 20:15:17,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:15:17,721 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-23 20:15:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:17,732 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:15:17,733 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:15:17,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:15:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:15:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:15:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:15:17,778 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-23 20:15:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:17,778 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:15:17,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:15:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:15:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:17,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:17,780 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 20:15:17,781 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-23 20:15:17,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:17,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192276418] [2019-11-23 20:15:17,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:17,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192276418] [2019-11-23 20:15:17,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:17,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:17,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922687624] [2019-11-23 20:15:17,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:17,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:17,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:17,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:17,928 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 4 states. [2019-11-23 20:15:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,023 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-23 20:15:18,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:18,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:15:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,026 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:15:18,026 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:15:18,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:15:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:15:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:15:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:15:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-23 20:15:18,053 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-23 20:15:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,053 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-23 20:15:18,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-23 20:15:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:15:18,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,055 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, 1, 1] [2019-11-23 20:15:18,055 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-23 20:15:18,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279058207] [2019-11-23 20:15:18,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:15:18,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279058207] [2019-11-23 20:15:18,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:15:18,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315640820] [2019-11-23 20:15:18,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:15:18,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:15:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:18,133 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 3 states. [2019-11-23 20:15:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,196 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2019-11-23 20:15:18,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:15:18,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-23 20:15:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,198 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:15:18,198 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:15:18,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:15:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 20:15:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:15:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2019-11-23 20:15:18,209 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2019-11-23 20:15:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,209 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2019-11-23 20:15:18,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:15:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2019-11-23 20:15:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:15:18,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,211 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, 1, 1, 1, 1] [2019-11-23 20:15:18,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2019-11-23 20:15:18,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276209162] [2019-11-23 20:15:18,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:15:18,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276209162] [2019-11-23 20:15:18,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:18,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533293644] [2019-11-23 20:15:18,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:18,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:18,277 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2019-11-23 20:15:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,467 INFO L93 Difference]: Finished difference Result 108 states and 144 transitions. [2019-11-23 20:15:18,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:18,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-23 20:15:18,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,469 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:15:18,469 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:15:18,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:15:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-23 20:15:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:15:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-23 20:15:18,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2019-11-23 20:15:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,500 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-23 20:15:18,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-23 20:15:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:15:18,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,505 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, 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 20:15:18,506 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2019-11-23 20:15:18,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817081077] [2019-11-23 20:15:18,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:15:18,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817081077] [2019-11-23 20:15:18,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800347958] [2019-11-23 20:15:18,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:18,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:15:18,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:18,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:15:18,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203954422] [2019-11-23 20:15:18,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:15:18,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:15:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:18,772 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-11-23 20:15:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,859 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-23 20:15:18,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:15:18,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:15:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,861 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:15:18,861 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:15:18,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:15:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-23 20:15:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:15:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 20:15:18,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2019-11-23 20:15:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,870 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 20:15:18,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:15:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 20:15:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:15:18,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,871 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, 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 20:15:19,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:19,077 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2019-11-23 20:15:19,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:19,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467087376] [2019-11-23 20:15:19,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:15:19,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467087376] [2019-11-23 20:15:19,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499897244] [2019-11-23 20:15:19,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:19,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:19,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:19,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:19,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:15:19,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:19,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:15:19,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230124017] [2019-11-23 20:15:19,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:15:19,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:15:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:15:19,273 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2019-11-23 20:15:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:19,490 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-11-23 20:15:19,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:15:19,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:15:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:19,492 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:15:19,492 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:15:19,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:15:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:15:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2019-11-23 20:15:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:15:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-23 20:15:19,505 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2019-11-23 20:15:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:19,505 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-23 20:15:19,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:15:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-23 20:15:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:15:19,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:19,507 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:19,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:19,715 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2019-11-23 20:15:19,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:19,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905018067] [2019-11-23 20:15:19,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:21,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905018067] [2019-11-23 20:15:21,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833838148] [2019-11-23 20:15:21,043 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:21,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:15:21,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:21,121 WARN L253 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 105 conjunts are in the unsatisfiable core [2019-11-23 20:15:21,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:22,318 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:22,319 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:15:22,320 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:15:22,334 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:22,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,339 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:22,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-23 20:15:22,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:22,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:22,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2019-11-23 20:15:22,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221737163] [2019-11-23 20:15:22,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:15:22,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:15:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:15:22,564 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 32 states. [2019-11-23 20:15:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:24,943 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2019-11-23 20:15:24,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:15:24,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2019-11-23 20:15:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:24,946 INFO L225 Difference]: With dead ends: 207 [2019-11-23 20:15:24,946 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 20:15:24,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 33 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:15:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 20:15:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2019-11-23 20:15:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:15:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2019-11-23 20:15:24,968 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2019-11-23 20:15:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:24,969 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2019-11-23 20:15:24,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:15:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2019-11-23 20:15:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:15:24,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:24,971 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:25,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:25,175 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2019-11-23 20:15:25,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:25,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941606369] [2019-11-23 20:15:25,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:15:25,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941606369] [2019-11-23 20:15:25,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257090966] [2019-11-23 20:15:25,275 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 20:15:25,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:25,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:25,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:25,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:15:25,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:25,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:25,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230453476] [2019-11-23 20:15:25,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:25,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:25,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:25,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:25,394 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2019-11-23 20:15:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:25,830 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2019-11-23 20:15:25,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:25,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2019-11-23 20:15:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:25,832 INFO L225 Difference]: With dead ends: 248 [2019-11-23 20:15:25,832 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:15:25,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:15:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:15:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 20:15:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:15:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2019-11-23 20:15:25,856 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2019-11-23 20:15:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:25,857 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2019-11-23 20:15:25,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2019-11-23 20:15:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:15:25,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:25,861 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:26,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:26,068 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2019-11-23 20:15:26,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:26,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390846735] [2019-11-23 20:15:26,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 20:15:26,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390846735] [2019-11-23 20:15:26,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624924442] [2019-11-23 20:15:26,172 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 20:15:26,694 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:15:26,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:26,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:26,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 20:15:26,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:26,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 20:15:26,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373726920] [2019-11-23 20:15:26,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:15:26,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:26,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:15:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:26,810 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand 16 states. [2019-11-23 20:15:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:27,172 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2019-11-23 20:15:27,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:27,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2019-11-23 20:15:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:27,173 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:15:27,174 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:15:27,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:15:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:15:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2019-11-23 20:15:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:15:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-11-23 20:15:27,183 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2019-11-23 20:15:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:27,184 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-11-23 20:15:27,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:15:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-11-23 20:15:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:15:27,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:27,185 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:15:27,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:27,395 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2019-11-23 20:15:27,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:27,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052054859] [2019-11-23 20:15:27,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:28,870 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2019-11-23 20:15:29,035 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 24 [2019-11-23 20:15:29,223 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 24 [2019-11-23 20:15:29,437 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 28 [2019-11-23 20:15:29,640 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2019-11-23 20:15:29,823 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2019-11-23 20:15:30,036 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2019-11-23 20:15:30,269 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 27 [2019-11-23 20:15:30,483 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2019-11-23 20:15:30,692 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2019-11-23 20:15:30,900 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2019-11-23 20:15:31,078 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2019-11-23 20:15:31,253 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2019-11-23 20:15:31,411 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 13 [2019-11-23 20:15:31,607 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2019-11-23 20:15:31,802 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 20 [2019-11-23 20:15:32,030 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2019-11-23 20:15:32,246 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2019-11-23 20:15:32,485 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2019-11-23 20:15:32,695 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2019-11-23 20:15:32,902 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2019-11-23 20:15:33,204 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2019-11-23 20:15:33,404 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2019-11-23 20:15:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:36,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052054859] [2019-11-23 20:15:36,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38748767] [2019-11-23 20:15:36,015 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 20:15:36,083 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:15:36,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:36,087 WARN L253 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 142 conjunts are in the unsatisfiable core [2019-11-23 20:15:36,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:39,436 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:39,439 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:39,444 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:39,464 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:39,465 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2019-11-23 20:15:39,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,470 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2019-11-23 20:15:39,519 INFO L567 ElimStorePlain]: treesize reduction 49, result has 37.2 percent of original size [2019-11-23 20:15:39,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:39,522 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:31 [2019-11-23 20:15:39,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:39,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:40,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39] total 72 [2019-11-23 20:15:40,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427871293] [2019-11-23 20:15:40,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-23 20:15:40,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-23 20:15:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=4464, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:15:40,178 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 72 states. [2019-11-23 20:15:41,088 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-23 20:15:42,593 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-23 20:15:42,869 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-11-23 20:15:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:46,904 INFO L93 Difference]: Finished difference Result 212 states and 237 transitions. [2019-11-23 20:15:46,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:15:46,905 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 93 [2019-11-23 20:15:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:46,907 INFO L225 Difference]: With dead ends: 212 [2019-11-23 20:15:46,908 INFO L226 Difference]: Without dead ends: 208 [2019-11-23 20:15:46,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 45 SyntacticMatches, 66 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=886, Invalid=6254, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:15:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-23 20:15:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 173. [2019-11-23 20:15:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 20:15:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2019-11-23 20:15:46,925 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 93 [2019-11-23 20:15:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:46,925 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2019-11-23 20:15:46,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-23 20:15:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2019-11-23 20:15:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:15:46,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:46,927 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:15:47,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:47,132 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:47,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2019-11-23 20:15:47,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:47,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917808296] [2019-11-23 20:15:47,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:15:47,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917808296] [2019-11-23 20:15:47,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820557077] [2019-11-23 20:15:47,233 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 20:15:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:47,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:47,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:15:47,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:47,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:15:47,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020388333] [2019-11-23 20:15:47,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:15:47,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:15:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:47,518 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand 19 states. [2019-11-23 20:15:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:48,381 INFO L93 Difference]: Finished difference Result 497 states and 558 transitions. [2019-11-23 20:15:48,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:15:48,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2019-11-23 20:15:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:48,384 INFO L225 Difference]: With dead ends: 497 [2019-11-23 20:15:48,385 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:15:48,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:15:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:15:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2019-11-23 20:15:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:15:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2019-11-23 20:15:48,407 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2019-11-23 20:15:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:48,407 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2019-11-23 20:15:48,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:15:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2019-11-23 20:15:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:15:48,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:48,408 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:15:48,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:48,618 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2019-11-23 20:15:48,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:48,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387781921] [2019-11-23 20:15:48,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-23 20:15:48,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387781921] [2019-11-23 20:15:48,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218854614] [2019-11-23 20:15:48,719 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:48,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:48,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:48,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:48,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-23 20:15:48,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:48,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:15:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259830192] [2019-11-23 20:15:48,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:15:48,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:15:48,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:48,894 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 19 states. [2019-11-23 20:15:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:49,568 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2019-11-23 20:15:49,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:15:49,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2019-11-23 20:15:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:49,569 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:15:49,570 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:15:49,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:15:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:15:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2019-11-23 20:15:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:15:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2019-11-23 20:15:49,577 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2019-11-23 20:15:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:49,577 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2019-11-23 20:15:49,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:15:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2019-11-23 20:15:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:15:49,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:49,579 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:49,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:49,780 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2019-11-23 20:15:49,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:49,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419815986] [2019-11-23 20:15:49,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:51,102 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 12 [2019-11-23 20:15:51,287 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 12 [2019-11-23 20:15:51,459 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 12 [2019-11-23 20:15:51,671 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 15 [2019-11-23 20:15:51,939 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 20 [2019-11-23 20:15:52,227 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2019-11-23 20:15:52,504 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 32 [2019-11-23 20:15:52,812 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 31 [2019-11-23 20:15:53,117 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 34 [2019-11-23 20:15:53,429 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 31 [2019-11-23 20:15:53,689 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2019-11-23 20:15:53,988 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 34 [2019-11-23 20:15:54,300 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 31 [2019-11-23 20:15:54,634 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2019-11-23 20:15:54,932 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 32 [2019-11-23 20:15:55,210 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2019-11-23 20:15:55,482 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 29 [2019-11-23 20:15:55,736 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 24 [2019-11-23 20:15:55,966 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2019-11-23 20:15:56,216 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 18 [2019-11-23 20:15:56,423 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 13 [2019-11-23 20:15:56,663 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2019-11-23 20:15:56,930 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 20 [2019-11-23 20:15:57,267 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2019-11-23 20:15:57,579 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 31 [2019-11-23 20:15:57,896 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2019-11-23 20:15:58,198 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2019-11-23 20:15:58,492 WARN L192 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2019-11-23 20:15:58,799 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2019-11-23 20:15:59,079 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2019-11-23 20:16:01,616 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2019-11-23 20:16:01,792 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2019-11-23 20:16:01,976 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-23 20:16:02,136 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-11-23 20:16:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 1 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:04,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419815986] [2019-11-23 20:16:04,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344586261] [2019-11-23 20:16:04,075 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 20:16:04,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:16:04,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:04,159 WARN L253 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 186 conjunts are in the unsatisfiable core [2019-11-23 20:16:04,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:04,218 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:16:04,219 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:04,228 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:04,229 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:04,229 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:16:06,798 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:06,800 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:06,802 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:06,817 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:06,818 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2019-11-23 20:16:06,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:06,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:06,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:06,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:06,822 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2019-11-23 20:16:06,852 INFO L567 ElimStorePlain]: treesize reduction 24, result has 55.6 percent of original size [2019-11-23 20:16:06,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:06,854 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:16:06,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2019-11-23 20:16:06,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:07,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:07,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:16:07,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:07,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 26] total 75 [2019-11-23 20:16:07,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563104576] [2019-11-23 20:16:07,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-11-23 20:16:07,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-11-23 20:16:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=4994, Unknown=0, NotChecked=0, Total=5550 [2019-11-23 20:16:07,173 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 75 states. [2019-11-23 20:16:08,999 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-11-23 20:16:09,542 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2019-11-23 20:16:09,839 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2019-11-23 20:16:10,384 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2019-11-23 20:16:11,052 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2019-11-23 20:16:14,189 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2019-11-23 20:16:20,431 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2019-11-23 20:16:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:20,436 INFO L93 Difference]: Finished difference Result 338 states and 370 transitions. [2019-11-23 20:16:20,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-23 20:16:20,436 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 115 [2019-11-23 20:16:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:20,439 INFO L225 Difference]: With dead ends: 338 [2019-11-23 20:16:20,439 INFO L226 Difference]: Without dead ends: 332 [2019-11-23 20:16:20,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 73 SyntacticMatches, 79 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8132 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1628, Invalid=16732, Unknown=0, NotChecked=0, Total=18360 [2019-11-23 20:16:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-11-23 20:16:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 213. [2019-11-23 20:16:20,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 20:16:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 234 transitions. [2019-11-23 20:16:20,458 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 234 transitions. Word has length 115 [2019-11-23 20:16:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:20,459 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 234 transitions. [2019-11-23 20:16:20,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-11-23 20:16:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 234 transitions. [2019-11-23 20:16:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:16:20,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:20,460 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:20,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:20,681 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:20,682 INFO L82 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2019-11-23 20:16:20,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:20,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853569574] [2019-11-23 20:16:20,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:16:20,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853569574] [2019-11-23 20:16:20,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438493241] [2019-11-23 20:16:20,813 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 20:16:20,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:16:20,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:20,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:20,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:16:21,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:21,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-11-23 20:16:21,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345086452] [2019-11-23 20:16:21,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:16:21,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:16:21,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:16:21,133 INFO L87 Difference]: Start difference. First operand 213 states and 234 transitions. Second operand 23 states. [2019-11-23 20:16:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:22,268 INFO L93 Difference]: Finished difference Result 605 states and 666 transitions. [2019-11-23 20:16:22,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:16:22,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2019-11-23 20:16:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:22,271 INFO L225 Difference]: With dead ends: 605 [2019-11-23 20:16:22,271 INFO L226 Difference]: Without dead ends: 244 [2019-11-23 20:16:22,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:16:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-23 20:16:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 216. [2019-11-23 20:16:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 20:16:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 234 transitions. [2019-11-23 20:16:22,285 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 234 transitions. Word has length 117 [2019-11-23 20:16:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:22,285 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 234 transitions. [2019-11-23 20:16:22,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:16:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 234 transitions. [2019-11-23 20:16:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:16:22,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:22,287 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:22,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:22,491 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:22,491 INFO L82 PathProgramCache]: Analyzing trace with hash 28051576, now seen corresponding path program 11 times [2019-11-23 20:16:22,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:22,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727511659] [2019-11-23 20:16:22,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:16:22,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727511659] [2019-11-23 20:16:22,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121198864] [2019-11-23 20:16:22,610 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 20:16:23,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:16:23,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:23,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:23,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:16:23,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:23,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-11-23 20:16:23,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913388951] [2019-11-23 20:16:23,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:16:23,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:16:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:16:23,457 INFO L87 Difference]: Start difference. First operand 216 states and 234 transitions. Second operand 23 states. [2019-11-23 20:16:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:24,439 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2019-11-23 20:16:24,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:16:24,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-11-23 20:16:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:24,444 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:16:24,445 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:16:24,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:16:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:16:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2019-11-23 20:16:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:16:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-11-23 20:16:24,459 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2019-11-23 20:16:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:24,459 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-11-23 20:16:24,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:16:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-11-23 20:16:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:16:24,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:24,461 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:24,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:24,666 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2019-11-23 20:16:24,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:24,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802541273] [2019-11-23 20:16:24,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:26,715 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 12 [2019-11-23 20:16:26,920 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 12 [2019-11-23 20:16:27,106 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 12 [2019-11-23 20:16:27,323 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 15 [2019-11-23 20:16:27,604 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 21 [2019-11-23 20:16:28,046 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 36 [2019-11-23 20:16:28,378 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 29 [2019-11-23 20:16:28,744 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 37 [2019-11-23 20:16:29,096 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 33 [2019-11-23 20:16:29,470 WARN L192 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 39 [2019-11-23 20:16:29,835 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2019-11-23 20:16:30,191 WARN L192 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 39 [2019-11-23 20:16:30,525 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2019-11-23 20:16:30,914 WARN L192 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 34 [2019-11-23 20:16:31,222 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 31 [2019-11-23 20:16:31,552 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 36 [2019-11-23 20:16:31,884 WARN L192 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 32 [2019-11-23 20:16:32,269 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 37 [2019-11-23 20:16:32,663 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 33 [2019-11-23 20:16:33,051 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2019-11-23 20:16:33,425 WARN L192 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 31 [2019-11-23 20:16:33,836 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 31 [2019-11-23 20:16:34,187 WARN L192 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 27 [2019-11-23 20:16:34,490 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 25 [2019-11-23 20:16:34,766 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 21 [2019-11-23 20:16:35,048 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 18 [2019-11-23 20:16:36,861 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2019-11-23 20:16:37,079 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2019-11-23 20:16:37,338 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 33 [2019-11-23 20:16:37,585 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2019-11-23 20:16:37,858 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 35 [2019-11-23 20:16:38,129 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2019-11-23 20:16:38,375 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2019-11-23 20:16:38,611 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 28 [2019-11-23 20:16:38,831 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 25 [2019-11-23 20:16:39,040 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2019-11-23 20:16:39,253 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 17 [2019-11-23 20:16:39,548 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 34 [2019-11-23 20:16:39,789 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2019-11-23 20:16:40,052 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2019-11-23 20:16:40,335 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2019-11-23 20:16:40,593 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2019-11-23 20:16:40,833 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 32 [2019-11-23 20:16:41,080 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2019-11-23 20:16:41,317 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2019-11-23 20:16:41,557 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2019-11-23 20:16:41,860 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-11-23 20:16:42,079 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2019-11-23 20:16:42,298 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2019-11-23 20:16:42,508 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2019-11-23 20:16:42,717 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2019-11-23 20:16:42,916 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2019-11-23 20:16:43,105 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2019-11-23 20:16:43,707 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2019-11-23 20:16:43,883 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2019-11-23 20:16:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 6 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:45,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802541273] [2019-11-23 20:16:45,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240385752] [2019-11-23 20:16:45,456 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 20:16:45,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:16:45,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:45,556 WARN L253 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 230 conjunts are in the unsatisfiable core [2019-11-23 20:16:45,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:45,669 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:16:45,669 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:45,679 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:45,680 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:45,680 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10