/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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:20:08,335 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 03:20:08,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:20:08,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:20:08,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:20:08,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:20:08,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:20:08,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:20:08,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:20:08,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:20:08,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:20:08,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:20:08,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:20:08,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:20:08,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:20:08,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:20:08,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:20:08,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:20:08,384 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 03:20:08,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:20:08,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:20:08,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:20:08,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:20:08,400 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:20:08,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:20:08,401 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:20:08,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:20:08,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:20:08,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:20:08,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:20:08,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:20:08,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:20:08,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:20:08,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:20:08,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:20:08,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:20:08,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:20:08,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:20:08,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:20:08,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:20:08,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:20:08,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:20:08,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:20:08,405 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 03:20:08,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:20:08,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:20:08,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:20:08,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:20:08,719 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:20:08,720 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 03:20:08,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afce246f7/8a80f879687343df86f0da833e4fe4b2/FLAGb5273ceb9 [2020-07-20 03:20:09,239 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:20:09,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-20 03:20:09,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afce246f7/8a80f879687343df86f0da833e4fe4b2/FLAGb5273ceb9 [2020-07-20 03:20:09,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afce246f7/8a80f879687343df86f0da833e4fe4b2 [2020-07-20 03:20:09,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:20:09,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:20:09,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:09,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:20:09,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:20:09,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bced47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09, skipping insertion in model container [2020-07-20 03:20:09,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:20:09,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:20:09,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:09,884 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:20:09,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:20:09,917 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:20:09,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09 WrapperNode [2020-07-20 03:20:09,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:20:09,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:20:09,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:20:09,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:20:09,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (1/1) ... [2020-07-20 03:20:09,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:20:09,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:20:09,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:20:09,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:20:09,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (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 03:20:10,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:20:10,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:20:10,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 03:20:10,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 03:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:20:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:20:10,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:20:10,330 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:20:10,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:10 BoogieIcfgContainer [2020-07-20 03:20:10,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:20:10,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:20:10,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:20:10,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:20:10,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:20:09" (1/3) ... [2020-07-20 03:20:10,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330d459a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:10, skipping insertion in model container [2020-07-20 03:20:10,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:20:09" (2/3) ... [2020-07-20 03:20:10,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330d459a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:20:10, skipping insertion in model container [2020-07-20 03:20:10,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:20:10" (3/3) ... [2020-07-20 03:20:10,341 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-20 03:20:10,351 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:20:10,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:20:10,370 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:20:10,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:20:10,392 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:20:10,393 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:20:10,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:20:10,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:20:10,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:20:10,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:20:10,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:20:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 03:20:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 03:20:10,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:10,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:10,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 03:20:10,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:10,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109378720] [2020-07-20 03:20:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:10,663 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 03:20:10,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109378720] [2020-07-20 03:20:10,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:10,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 03:20:10,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240703085] [2020-07-20 03:20:10,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:20:10,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:20:10,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:20:10,690 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-20 03:20:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:10,937 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-07-20 03:20:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:20:10,939 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 03:20:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:10,950 INFO L225 Difference]: With dead ends: 41 [2020-07-20 03:20:10,950 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 03:20:10,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:20:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 03:20:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 03:20:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:20:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 03:20:10,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-20 03:20:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:10,997 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 03:20:10,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:20:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 03:20:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:20:11,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:11,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:11,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:20:11,002 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 03:20:11,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:11,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669504583] [2020-07-20 03:20:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:20:11,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669504583] [2020-07-20 03:20:11,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:20:11,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 03:20:11,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410939888] [2020-07-20 03:20:11,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:20:11,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:20:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:20:11,167 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-20 03:20:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:11,368 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-20 03:20:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:20:11,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 03:20:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:11,371 INFO L225 Difference]: With dead ends: 32 [2020-07-20 03:20:11,371 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 03:20:11,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:20:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 03:20:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 03:20:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 03:20:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-20 03:20:11,382 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-20 03:20:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:11,382 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-20 03:20:11,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:20:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-20 03:20:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:20:11,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:11,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:11,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:20:11,385 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:11,386 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-20 03:20:11,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:11,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889126980] [2020-07-20 03:20:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:20:11,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889126980] [2020-07-20 03:20:11,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184448073] [2020-07-20 03:20:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@405ce7b0 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 03:20:11,560 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@405ce7b0 issued 3 check-sat command(s) [2020-07-20 03:20:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:20:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 03:20:11,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:11,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-07-20 03:20:11,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836096623] [2020-07-20 03:20:11,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:20:11,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:20:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:20:11,675 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2020-07-20 03:20:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:11,838 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2020-07-20 03:20:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:20:11,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 03:20:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:11,841 INFO L225 Difference]: With dead ends: 51 [2020-07-20 03:20:11,842 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:20:11,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:20:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:20:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-07-20 03:20:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 03:20:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 03:20:11,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-20 03:20:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:11,853 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 03:20:11,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:20:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 03:20:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 03:20:11,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:11,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:12,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:20:12,070 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-20 03:20:12,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:12,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064352114] [2020-07-20 03:20:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 03:20:12,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064352114] [2020-07-20 03:20:12,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725499168] [2020-07-20 03:20:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c8826c6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:12,380 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c8826c6 issued 4 check-sat command(s) [2020-07-20 03:20:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:20:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 03:20:12,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:12,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-07-20 03:20:12,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29019605] [2020-07-20 03:20:12,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:20:12,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:20:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:20:12,416 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 14 states. [2020-07-20 03:20:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:12,891 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2020-07-20 03:20:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:20:12,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-07-20 03:20:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:12,898 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:20:12,898 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:20:12,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:20:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:20:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-07-20 03:20:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:20:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2020-07-20 03:20:12,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2020-07-20 03:20:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:12,932 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2020-07-20 03:20:12,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:20:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2020-07-20 03:20:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 03:20:12,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:12,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:13,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:13,157 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2020-07-20 03:20:13,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:13,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33683000] [2020-07-20 03:20:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 03:20:13,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33683000] [2020-07-20 03:20:13,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76521347] [2020-07-20 03:20:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ae7dabd 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 03:20:13,407 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ae7dabd issued 4 check-sat command(s) [2020-07-20 03:20:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:20:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-20 03:20:13,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:13,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-07-20 03:20:13,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304693949] [2020-07-20 03:20:13,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:20:13,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:20:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:20:13,444 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 15 states. [2020-07-20 03:20:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:13,982 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2020-07-20 03:20:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:20:13,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-07-20 03:20:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:13,991 INFO L225 Difference]: With dead ends: 65 [2020-07-20 03:20:13,995 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 03:20:13,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-07-20 03:20:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 03:20:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-07-20 03:20:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 03:20:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-07-20 03:20:14,017 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2020-07-20 03:20:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:14,018 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-07-20 03:20:14,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:20:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-07-20 03:20:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 03:20:14,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:14,020 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:14,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:14,237 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2020-07-20 03:20:14,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:14,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060268628] [2020-07-20 03:20:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 03:20:14,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060268628] [2020-07-20 03:20:14,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581239419] [2020-07-20 03:20:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dbe2b8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:14,472 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dbe2b8 issued 2 check-sat command(s) [2020-07-20 03:20:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:20:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 03:20:14,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:14,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 03:20:14,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822387287] [2020-07-20 03:20:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:20:14,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:20:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:20:14,539 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 11 states. [2020-07-20 03:20:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:14,710 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2020-07-20 03:20:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:20:14,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-07-20 03:20:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:14,713 INFO L225 Difference]: With dead ends: 82 [2020-07-20 03:20:14,713 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 03:20:14,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:20:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 03:20:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 03:20:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 03:20:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 96 transitions. [2020-07-20 03:20:14,739 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 96 transitions. Word has length 42 [2020-07-20 03:20:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:14,739 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 96 transitions. [2020-07-20 03:20:14,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:20:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 96 transitions. [2020-07-20 03:20:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:20:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:14,744 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:14,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:14,956 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1391486109, now seen corresponding path program 4 times [2020-07-20 03:20:14,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:14,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264073553] [2020-07-20 03:20:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-20 03:20:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264073553] [2020-07-20 03:20:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639484560] [2020-07-20 03:20:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63801975 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 03:20:15,077 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63801975 issued 3 check-sat command(s) [2020-07-20 03:20:15,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:20:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-20 03:20:15,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:15,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 03:20:15,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482414081] [2020-07-20 03:20:15,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:20:15,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:20:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:20:15,127 INFO L87 Difference]: Start difference. First operand 56 states and 96 transitions. Second operand 6 states. [2020-07-20 03:20:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:15,188 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2020-07-20 03:20:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:20:15,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-07-20 03:20:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:15,193 INFO L225 Difference]: With dead ends: 100 [2020-07-20 03:20:15,193 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:20:15,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:20:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:20:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:20:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:20:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 97 transitions. [2020-07-20 03:20:15,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 97 transitions. Word has length 49 [2020-07-20 03:20:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:15,209 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 97 transitions. [2020-07-20 03:20:15,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:20:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 97 transitions. [2020-07-20 03:20:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 03:20:15,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:20:15,211 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:20:15,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:20:15,427 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:20:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:20:15,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 5 times [2020-07-20 03:20:15,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:20:15,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311538005] [2020-07-20 03:20:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1613f6be [2020-07-20 03:20:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:20:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-20 03:20:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311538005] [2020-07-20 03:20:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901727606] [2020-07-20 03:20:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@490a348b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:15,725 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@490a348b issued 4 check-sat command(s) [2020-07-20 03:20:15,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:20:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 03:20:15,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:20:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-20 03:20:15,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:20:15,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2020-07-20 03:20:15,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028159686] [2020-07-20 03:20:15,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:20:15,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:20:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:20:15,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:20:15,779 INFO L87 Difference]: Start difference. First operand 57 states and 97 transitions. Second operand 16 states. [2020-07-20 03:20:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:20:16,320 INFO L93 Difference]: Finished difference Result 104 states and 212 transitions. [2020-07-20 03:20:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:20:16,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2020-07-20 03:20:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:20:16,322 INFO L225 Difference]: With dead ends: 104 [2020-07-20 03:20:16,322 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:20:16,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 03:20:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:20:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:20:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:20:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:20:16,328 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-07-20 03:20:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:20:16,329 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:20:16,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:20:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:20:16,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:20:16,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:20:16,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:20:17,047 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2020-07-20 03:20:17,115 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 03:20:17,115 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:20:17,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:20:17,116 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:20:17,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:20:17,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:20:17,116 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-20 03:20:17,116 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|))) [2020-07-20 03:20:17,116 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-20 03:20:17,117 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 03:20:17,117 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|)) (= 0 |ackermann_#in~n|)) [2020-07-20 03:20:17,117 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret1|))) (and (or (= 1 |ackermann_#in~n|) .cse0 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))) (let ((.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse1 .cse2 (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse3))))) [2020-07-20 03:20:17,117 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-20 03:20:17,117 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-20 03:20:17,117 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-20 03:20:17,118 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-20 03:20:17,119 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-20 03:20:17,119 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-07-20 03:20:17,119 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-20 03:20:17,119 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-20 03:20:17,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:20:17 BoogieIcfgContainer [2020-07-20 03:20:17,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:20:17,127 INFO L168 Benchmark]: Toolchain (without parser) took 7462.85 ms. Allocated memory was 136.3 MB in the beginning and 284.2 MB in the end (delta: 147.8 MB). Free memory was 100.7 MB in the beginning and 191.6 MB in the end (delta: -90.9 MB). Peak memory consumption was 157.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,128 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.90 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 91.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,129 INFO L168 Benchmark]: Boogie Preprocessor took 30.53 ms. Allocated memory is still 136.3 MB. Free memory was 91.0 MB in the beginning and 89.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,130 INFO L168 Benchmark]: RCFGBuilder took 384.14 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 89.5 MB in the beginning and 168.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,131 INFO L168 Benchmark]: TraceAbstraction took 6790.32 ms. Allocated memory was 201.9 MB in the beginning and 284.2 MB in the end (delta: 82.3 MB). Free memory was 167.4 MB in the beginning and 191.6 MB in the end (delta: -24.3 MB). Peak memory consumption was 158.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:20:17,134 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.90 ms. Allocated memory is still 136.3 MB. Free memory was 100.3 MB in the beginning and 91.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.53 ms. Allocated memory is still 136.3 MB. Free memory was 91.0 MB in the beginning and 89.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.14 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 89.5 MB in the beginning and 168.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6790.32 ms. Allocated memory was 201.9 MB in the beginning and 284.2 MB in the end (delta: 82.3 MB). Free memory was 167.4 MB in the beginning and 191.6 MB in the end (delta: -24.3 MB). Peak memory consumption was 158.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 185 SDslu, 836 SDs, 0 SdLazy, 1483 SolverSat, 298 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=7, 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, 8 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 133 PreInvPairs, 166 NumberOfFragments, 88 HoareAnnotationTreeSize, 133 FomulaSimplifications, 10836 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 388 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 553 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 539 ConstructedInterpolants, 0 QuantifiedInterpolants, 44151 SizeOfPredicates, 22 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 522/666 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...