/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/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:35:15,224 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:35:15,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:35:15,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:35:15,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:35:15,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:35:15,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:35:15,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:35:15,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:35:15,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:35:15,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:35:15,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:35:15,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:35:15,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:35:15,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:35:15,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:35:15,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:35:15,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:35:15,290 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 [2020-07-20 03:35:15,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:35:15,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:35:15,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:35:15,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:35:15,306 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:35:15,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:35:15,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:35:15,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:35:15,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:35:15,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:35:15,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:35:15,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:35:15,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:35:15,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:35:15,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:35:15,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:35:15,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:35:15,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:35:15,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:35:15,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:35:15,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:35:15,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:15,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:35:15,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:35:15,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:35:15,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:35:15,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:35:15,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:35:15,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:35:15,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:35:15,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:35:15,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:35:15,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:35:15,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:35:15,580 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:35:15,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-20 03:35:15,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2a0ab00/b8121214be704cc2a0fe277620d99d87/FLAGd8d8b7036 [2020-07-20 03:35:16,056 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:35:16,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-20 03:35:16,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2a0ab00/b8121214be704cc2a0fe277620d99d87/FLAGd8d8b7036 [2020-07-20 03:35:16,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2a0ab00/b8121214be704cc2a0fe277620d99d87 [2020-07-20 03:35:16,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:35:16,455 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:35:16,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:16,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:35:16,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:35:16,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7e7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16, skipping insertion in model container [2020-07-20 03:35:16,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:35:16,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:35:16,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:16,669 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:35:16,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:16,698 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:35:16,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16 WrapperNode [2020-07-20 03:35:16,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:16,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:35:16,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:35:16,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:35:16,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (1/1) ... [2020-07-20 03:35:16,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:35:16,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:35:16,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:35:16,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:35:16,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (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 [2020-07-20 03:35:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:35:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:35:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 03:35:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:35:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:35:17,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:35:17,013 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:35:17,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:17 BoogieIcfgContainer [2020-07-20 03:35:17,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:35:17,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:35:17,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:35:17,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:35:17,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:35:16" (1/3) ... [2020-07-20 03:35:17,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5872a1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:17, skipping insertion in model container [2020-07-20 03:35:17,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:16" (2/3) ... [2020-07-20 03:35:17,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5872a1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:17, skipping insertion in model container [2020-07-20 03:35:17,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:17" (3/3) ... [2020-07-20 03:35:17,024 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-07-20 03:35:17,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:35:17,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:35:17,054 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:35:17,076 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:35:17,077 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:35:17,077 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:35:17,077 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:35:17,077 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:35:17,077 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:35:17,078 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:35:17,078 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:35:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 03:35:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:35:17,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:17,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:17,103 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 03:35:17,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:17,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390188711] [2020-07-20 03:35:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:35:17,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390188711] [2020-07-20 03:35:17,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:35:17,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:35:17,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167837360] [2020-07-20 03:35:17,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:35:17,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:35:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:35:17,413 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 03:35:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:17,479 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 03:35:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:35:17,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:35:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:17,490 INFO L225 Difference]: With dead ends: 30 [2020-07-20 03:35:17,491 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:35:17,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:35:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:35:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 03:35:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 03:35:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 03:35:17,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 03:35:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:17,531 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 03:35:17,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:35:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 03:35:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:35:17,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:17,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:17,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:35:17,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 03:35:17,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:17,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342632610] [2020-07-20 03:35:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342632610] [2020-07-20 03:35:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632050334] [2020-07-20 03:35:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38ed7151 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:17,724 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38ed7151 issued 3 check-sat command(s) [2020-07-20 03:35:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:35:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:35:17,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:17,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 03:35:17,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65679259] [2020-07-20 03:35:17,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:35:17,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:35:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:35:17,804 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-20 03:35:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:17,862 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 03:35:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:35:17,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 03:35:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:17,864 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:35:17,864 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:35:17,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:35:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:35:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:35:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:35:17,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 03:35:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:17,873 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:35:17,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:35:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:35:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:35:17,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:17,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:18,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:35:18,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 03:35:18,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:18,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234295636] [2020-07-20 03:35:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:18,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234295636] [2020-07-20 03:35:18,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713912474] [2020-07-20 03:35:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79425cfd 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 [2020-07-20 03:35:18,246 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79425cfd issued 3 check-sat command(s) [2020-07-20 03:35:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:35:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:18,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:18,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 03:35:18,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005728580] [2020-07-20 03:35:18,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:35:18,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:35:18,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:18,294 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-20 03:35:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:18,364 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 03:35:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:35:18,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-20 03:35:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:18,367 INFO L225 Difference]: With dead ends: 28 [2020-07-20 03:35:18,367 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:35:18,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:35:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 03:35:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:35:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 03:35:18,374 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 03:35:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:18,375 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 03:35:18,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:35:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 03:35:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:35:18,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:18,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:18,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:18,591 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 03:35:18,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:18,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193805494] [2020-07-20 03:35:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193805494] [2020-07-20 03:35:18,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610046862] [2020-07-20 03:35:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@299dd84f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:18,830 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@299dd84f issued 3 check-sat command(s) [2020-07-20 03:35:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:35:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:18,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:18,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 03:35:18,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829421962] [2020-07-20 03:35:18,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:35:18,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:35:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:18,874 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-20 03:35:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:18,944 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 03:35:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:35:18,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 03:35:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:18,946 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:35:18,947 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:35:18,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:35:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:35:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:35:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:35:18,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 03:35:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:18,954 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:35:18,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:35:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:35:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:35:18,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:18,956 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:19,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:19,171 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 03:35:19,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:19,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961576562] [2020-07-20 03:35:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:19,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961576562] [2020-07-20 03:35:19,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653629484] [2020-07-20 03:35:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@704810ba 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 [2020-07-20 03:35:19,426 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@704810ba issued 3 check-sat command(s) [2020-07-20 03:35:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:35:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:19,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:19,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-20 03:35:19,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898273108] [2020-07-20 03:35:19,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:35:19,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:35:19,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:19,473 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-20 03:35:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:19,554 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 03:35:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:35:19,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-20 03:35:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:19,556 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:35:19,556 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:35:19,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:35:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:35:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:35:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 03:35:19,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 03:35:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:19,563 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 03:35:19,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:35:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 03:35:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 03:35:19,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:19,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:19,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:19,766 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 03:35:19,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:19,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238340456] [2020-07-20 03:35:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:19,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238340456] [2020-07-20 03:35:19,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139831701] [2020-07-20 03:35:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f6dbc0f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:19,976 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f6dbc0f issued 3 check-sat command(s) [2020-07-20 03:35:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:35:19,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:20,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:20,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-20 03:35:20,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348313304] [2020-07-20 03:35:20,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:35:20,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:35:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:20,024 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-20 03:35:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:20,128 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 03:35:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:35:20,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-20 03:35:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:20,130 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:35:20,130 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:35:20,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:35:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:35:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:35:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:35:20,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 03:35:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:20,143 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:35:20,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:35:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:35:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:35:20,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:20,145 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:20,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:35:20,347 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 03:35:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:20,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784197814] [2020-07-20 03:35:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:20,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784197814] [2020-07-20 03:35:20,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770561894] [2020-07-20 03:35:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@637cfaaa 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 [2020-07-20 03:35:20,565 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@637cfaaa issued 3 check-sat command(s) [2020-07-20 03:35:20,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:35:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:20,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:20,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-20 03:35:20,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039778495] [2020-07-20 03:35:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:35:20,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:35:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:20,642 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-20 03:35:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:20,752 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 03:35:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:35:20,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 03:35:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:20,755 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:35:20,755 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:35:20,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:35:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 03:35:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:35:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 03:35:20,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 03:35:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:20,766 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 03:35:20,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:35:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 03:35:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 03:35:20,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:20,772 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:20,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:20,986 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 03:35:20,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:20,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280232469] [2020-07-20 03:35:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:21,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280232469] [2020-07-20 03:35:21,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240519048] [2020-07-20 03:35:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5baaed43 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:21,228 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5baaed43 issued 3 check-sat command(s) [2020-07-20 03:35:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:35:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:21,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:21,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-20 03:35:21,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700008745] [2020-07-20 03:35:21,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:35:21,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:35:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:21,283 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-20 03:35:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:21,393 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 03:35:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:35:21,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-20 03:35:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:21,395 INFO L225 Difference]: With dead ends: 43 [2020-07-20 03:35:21,395 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:35:21,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:35:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:35:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:35:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:35:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:35:21,402 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 03:35:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:21,402 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:35:21,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:35:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:35:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:35:21,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:21,404 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:21,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:21,605 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 03:35:21,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:21,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335851168] [2020-07-20 03:35:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:21,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335851168] [2020-07-20 03:35:21,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144409550] [2020-07-20 03:35:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53c68a7c 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 [2020-07-20 03:35:21,873 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53c68a7c issued 3 check-sat command(s) [2020-07-20 03:35:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:35:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:21,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:21,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 03:35:21,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511894759] [2020-07-20 03:35:21,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:35:21,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:35:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:21,931 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 03:35:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:22,086 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 03:35:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:35:22,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-20 03:35:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:22,088 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:35:22,088 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:35:22,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:35:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:35:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 03:35:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:35:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 03:35:22,097 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 03:35:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:22,098 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 03:35:22,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:35:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 03:35:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:35:22,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:22,099 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:22,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:35:22,315 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 03:35:22,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:22,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429818105] [2020-07-20 03:35:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:22,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429818105] [2020-07-20 03:35:22,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113639605] [2020-07-20 03:35:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25630c97 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:22,647 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25630c97 issued 3 check-sat command(s) [2020-07-20 03:35:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:35:22,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:22,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:22,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-20 03:35:22,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32537023] [2020-07-20 03:35:22,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:35:22,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:35:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:22,705 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-20 03:35:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:22,845 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 03:35:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:35:22,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-20 03:35:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:22,847 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:35:22,848 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 03:35:22,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:35:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 03:35:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 03:35:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:35:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:35:22,855 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 03:35:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:22,855 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:35:22,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:35:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:35:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:35:22,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:22,857 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:23,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:23,072 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 03:35:23,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:23,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891530378] [2020-07-20 03:35:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:23,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891530378] [2020-07-20 03:35:23,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626266205] [2020-07-20 03:35:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f9e940c 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 [2020-07-20 03:35:23,454 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f9e940c issued 3 check-sat command(s) [2020-07-20 03:35:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:23,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:35:23,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:23,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:23,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-20 03:35:23,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367945706] [2020-07-20 03:35:23,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:35:23,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:35:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:23,536 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-20 03:35:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:23,704 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 03:35:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:35:23,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-20 03:35:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:23,707 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:35:23,708 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:35:23,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-20 03:35:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:35:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:35:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:35:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 03:35:23,719 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 03:35:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 03:35:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:35:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 03:35:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 03:35:23,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:23,722 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:23,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:23,923 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 03:35:23,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:23,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208093792] [2020-07-20 03:35:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:24,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208093792] [2020-07-20 03:35:24,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353492114] [2020-07-20 03:35:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28aefa4c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:24,296 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28aefa4c issued 3 check-sat command(s) [2020-07-20 03:35:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:35:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:24,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:24,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-20 03:35:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130322953] [2020-07-20 03:35:24,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:35:24,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:35:24,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:24,369 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-20 03:35:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:24,540 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 03:35:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:35:24,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-20 03:35:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:24,541 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:35:24,541 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:35:24,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:35:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:35:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:35:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:35:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:35:24,554 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 03:35:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:24,555 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:35:24,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:35:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:35:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:35:24,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:24,557 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:24,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:35:24,770 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:24,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-20 03:35:24,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:24,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444622722] [2020-07-20 03:35:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:25,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444622722] [2020-07-20 03:35:25,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343150889] [2020-07-20 03:35:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1625ef00 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 [2020-07-20 03:35:25,188 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1625ef00 issued 3 check-sat command(s) [2020-07-20 03:35:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:25,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:35:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:25,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:25,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-20 03:35:25,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978675348] [2020-07-20 03:35:25,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:35:25,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:25,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:35:25,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:25,243 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-20 03:35:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:25,430 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 03:35:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:35:25,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-20 03:35:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:25,432 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:35:25,432 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:35:25,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-20 03:35:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:35:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:35:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:35:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 03:35:25,441 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 03:35:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:25,443 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 03:35:25,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:35:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 03:35:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 03:35:25,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:25,446 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:25,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:35:25,658 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-20 03:35:25,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:25,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651009394] [2020-07-20 03:35:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:26,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651009394] [2020-07-20 03:35:26,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118197457] [2020-07-20 03:35:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17da8ee0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:26,240 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17da8ee0 issued 3 check-sat command(s) [2020-07-20 03:35:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:35:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:26,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:26,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-20 03:35:26,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749696307] [2020-07-20 03:35:26,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:35:26,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:35:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:26,310 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-20 03:35:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:26,511 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 03:35:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:35:26,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-20 03:35:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:26,514 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:35:26,514 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:35:26,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 03:35:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:35:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:35:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:35:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:35:26,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 03:35:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:26,530 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:35:26,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:35:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:35:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 03:35:26,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:26,534 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:26,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:35:26,748 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-20 03:35:26,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:26,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012054250] [2020-07-20 03:35:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:27,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012054250] [2020-07-20 03:35:27,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878897721] [2020-07-20 03:35:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@755afca2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:27,316 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@755afca2 issued 3 check-sat command(s) [2020-07-20 03:35:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:27,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 03:35:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:27,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:27,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-20 03:35:27,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987006045] [2020-07-20 03:35:27,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:35:27,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:35:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:35:27,385 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-20 03:35:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:27,599 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 03:35:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:35:27,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-20 03:35:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:27,601 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:35:27,601 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:35:27,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:35:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:35:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 03:35:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:35:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 03:35:27,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 03:35:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:27,608 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 03:35:27,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:35:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 03:35:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 03:35:27,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:27,609 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:27,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:27,824 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-20 03:35:27,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:27,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027226931] [2020-07-20 03:35:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:35:29,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027226931] [2020-07-20 03:35:29,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853500131] [2020-07-20 03:35:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53ad373 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:29,125 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53ad373 issued 4 check-sat command(s) [2020-07-20 03:35:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 03:35:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:35:29,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:29,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-07-20 03:35:29,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500392022] [2020-07-20 03:35:29,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 03:35:29,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:29,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 03:35:29,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 03:35:29,296 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-07-20 03:35:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:29,780 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 03:35:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 03:35:29,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-07-20 03:35:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:29,782 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:35:29,782 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 03:35:29,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 03:35:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 03:35:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 03:35:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 03:35:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 03:35:29,788 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 03:35:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:29,788 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 03:35:29,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 03:35:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 03:35:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:35:29,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:29,790 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:29,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:35:29,991 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:29,991 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-20 03:35:29,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:29,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612610109] [2020-07-20 03:35:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15a1168a [2020-07-20 03:35:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612610109] [2020-07-20 03:35:30,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493343605] [2020-07-20 03:35:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ea27d7a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:30,656 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ea27d7a issued 3 check-sat command(s) [2020-07-20 03:35:30,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:30,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 03:35:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:30,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:35:30,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-07-20 03:35:30,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126234324] [2020-07-20 03:35:30,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:35:30,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:35:30,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:35:30,739 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-07-20 03:35:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:31,085 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-07-20 03:35:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:35:31,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-07-20 03:35:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:31,086 INFO L225 Difference]: With dead ends: 63 [2020-07-20 03:35:31,086 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:35:31,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 03:35:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:35:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:35:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:35:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:35:31,090 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-07-20 03:35:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:31,090 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:35:31,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:35:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:35:31,090 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:35:31,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 03:35:31,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:35:31,317 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:35:31,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:35:31,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:35:31,318 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:35:31,318 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:35:31,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:35:31,319 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-20 03:35:31,319 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 03:35:31,319 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 03:35:31,319 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 03:35:31,319 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-20 03:35:31,319 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 15 main_~input~0) (<= main_~input~0 15)) [2020-07-20 03:35:31,320 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 03:35:31,320 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 03:35:31,320 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 03:35:31,320 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 03:35:31,321 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 03:35:31,321 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-20 03:35:31,321 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 03:35:31,321 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 03:35:31,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:35:31 BoogieIcfgContainer [2020-07-20 03:35:31,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:35:31,328 INFO L168 Benchmark]: Toolchain (without parser) took 14873.35 ms. Allocated memory was 138.4 MB in the beginning and 380.6 MB in the end (delta: 242.2 MB). Free memory was 103.5 MB in the beginning and 219.4 MB in the end (delta: -115.9 MB). Peak memory consumption was 126.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,329 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.21 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,330 INFO L168 Benchmark]: Boogie Preprocessor took 26.09 ms. Allocated memory is still 138.4 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,330 INFO L168 Benchmark]: RCFGBuilder took 290.14 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 171.7 MB in the end (delta: -79.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,331 INFO L168 Benchmark]: TraceAbstraction took 14308.72 ms. Allocated memory was 202.4 MB in the beginning and 380.6 MB in the end (delta: 178.3 MB). Free memory was 171.0 MB in the beginning and 219.4 MB in the end (delta: -48.4 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:31,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.21 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.09 ms. Allocated memory is still 138.4 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.14 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 171.7 MB in the end (delta: -79.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14308.72 ms. Allocated memory was 202.4 MB in the beginning and 380.6 MB in the end (delta: 178.3 MB). Free memory was 171.0 MB in the beginning and 219.4 MB in the end (delta: -48.4 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.2s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 526 SDslu, 2176 SDs, 0 SdLazy, 1348 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1331 SyntacticMatches, 4 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 1854 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 407376 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2093 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...