/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:08:12,075 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 13:08:12,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:08:12,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:08:12,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:08:12,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:08:12,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:08:12,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:08:12,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:08:12,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:08:12,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:08:12,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:08:12,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:08:12,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:08:12,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:08:12,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:08:12,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:08:12,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:08:12,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:08:12,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:08:12,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:08:12,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:08:12,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:08:12,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:08:12,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:08:12,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:08:12,165 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 13:08:12,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:08:12,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:08:12,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:08:12,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:08:12,182 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:08:12,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:08:12,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:08:12,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:08:12,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:08:12,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:08:12,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:08:12,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:08:12,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:08:12,184 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:08:12,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:08:12,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:08:12,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:08:12,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:08:12,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:08:12,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:08:12,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:08:12,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:08:12,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:08:12,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:08:12,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:08:12,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:08:12,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:12,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:08:12,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:08:12,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-20 13:08:12,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:08:12,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:08:12,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:08:12,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:08:12,549 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:08:12,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-20 13:08:12,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65946567e/48924740c36846b59a8560bfc75208c1/FLAGd3a2dbdb5 [2020-07-20 13:08:13,051 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:08:13,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-07-20 13:08:13,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65946567e/48924740c36846b59a8560bfc75208c1/FLAGd3a2dbdb5 [2020-07-20 13:08:13,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65946567e/48924740c36846b59a8560bfc75208c1 [2020-07-20 13:08:13,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:08:13,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:08:13,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:08:13,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:08:13,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:08:13,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dc4a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13, skipping insertion in model container [2020-07-20 13:08:13,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:08:13,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:08:13,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:08:13,658 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:08:13,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:08:13,692 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:08:13,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13 WrapperNode [2020-07-20 13:08:13,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:08:13,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:08:13,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:08:13,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:08:13,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (1/1) ... [2020-07-20 13:08:13,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:08:13,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:08:13,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:08:13,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:08:13,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (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 13:08:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:08:13,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:08:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-20 13:08:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-20 13:08:13,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:08:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:08:13,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:08:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-20 13:08:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-20 13:08:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:08:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:08:13,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:08:14,095 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:08:14,095 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:08:14,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:08:14 BoogieIcfgContainer [2020-07-20 13:08:14,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:08:14,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:08:14,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:08:14,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:08:14,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:08:13" (1/3) ... [2020-07-20 13:08:14,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e326ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:08:14, skipping insertion in model container [2020-07-20 13:08:14,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:08:13" (2/3) ... [2020-07-20 13:08:14,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e326ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:08:14, skipping insertion in model container [2020-07-20 13:08:14,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:08:14" (3/3) ... [2020-07-20 13:08:14,109 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-07-20 13:08:14,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:08:14,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:08:14,160 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:08:14,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:08:14,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:08:14,209 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:08:14,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:08:14,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:08:14,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:08:14,210 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:08:14,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:08:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 13:08:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:08:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:14,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:14,245 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-07-20 13:08:14,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:14,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366616276] [2020-07-20 13:08:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:14,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:08:14,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:08:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:14,489 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 13:08:14,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:14,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366616276] [2020-07-20 13:08:14,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:14,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:08:14,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589194285] [2020-07-20 13:08:14,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:08:14,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:08:14,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:08:14,517 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-20 13:08:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:14,724 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-20 13:08:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:08:14,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 13:08:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:14,740 INFO L225 Difference]: With dead ends: 43 [2020-07-20 13:08:14,740 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 13:08:14,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:08:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 13:08:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 13:08:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:08:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 13:08:14,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-20 13:08:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:14,794 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 13:08:14,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:08:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 13:08:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 13:08:14,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:14,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:15,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-07-20 13:08:15,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:15,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586035908] [2020-07-20 13:08:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,046 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:08:15,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:08:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:15,138 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 13:08:15,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:15,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586035908] [2020-07-20 13:08:15,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:15,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:08:15,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624914939] [2020-07-20 13:08:15,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:08:15,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:08:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:08:15,143 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-20 13:08:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:15,236 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-20 13:08:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:08:15,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 13:08:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:15,238 INFO L225 Difference]: With dead ends: 33 [2020-07-20 13:08:15,238 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 13:08:15,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:08:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 13:08:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-20 13:08:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:08:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 13:08:15,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-07-20 13:08:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:15,248 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 13:08:15,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:08:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 13:08:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:08:15,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:15,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:15,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,457 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-07-20 13:08:15,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:15,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116219239] [2020-07-20 13:08:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:08:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:15,516 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 13:08:15,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:15,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116219239] [2020-07-20 13:08:15,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:15,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:08:15,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119737033] [2020-07-20 13:08:15,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:08:15,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:08:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:08:15,520 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-20 13:08:15,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:15,584 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-20 13:08:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:08:15,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 13:08:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:15,587 INFO L225 Difference]: With dead ends: 41 [2020-07-20 13:08:15,588 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 13:08:15,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:08:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 13:08:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-07-20 13:08:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:08:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 13:08:15,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-07-20 13:08:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:15,602 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 13:08:15,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:08:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 13:08:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 13:08:15,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:15,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:15,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-07-20 13:08:15,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:15,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642495958] [2020-07-20 13:08:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:15,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:08:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:08:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:15,969 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 13:08:15,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:15,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642495958] [2020-07-20 13:08:15,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:15,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 13:08:15,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244521075] [2020-07-20 13:08:15,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 13:08:15,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 13:08:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:08:15,972 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 10 states. [2020-07-20 13:08:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:16,129 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-07-20 13:08:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:08:16,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-20 13:08:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:16,131 INFO L225 Difference]: With dead ends: 36 [2020-07-20 13:08:16,131 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:08:16,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-20 13:08:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:08:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 13:08:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:08:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 13:08:16,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-20 13:08:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:16,139 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 13:08:16,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 13:08:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 13:08:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 13:08:16,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:16,141 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, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:16,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:16,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-07-20 13:08:16,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:16,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94901199] [2020-07-20 13:08:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:16,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:08:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:08:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:16,423 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 13:08:16,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:08:16,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94901199] [2020-07-20 13:08:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:08:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:08:16,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479389643] [2020-07-20 13:08:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:08:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:08:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:08:16,426 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-07-20 13:08:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:16,468 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-07-20 13:08:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:08:16,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-20 13:08:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:16,470 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:08:16,470 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:08:16,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:08:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:08:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 13:08:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 13:08:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-07-20 13:08:16,477 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-07-20 13:08:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:16,477 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-07-20 13:08:16,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:08:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-07-20 13:08:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 13:08:16,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:16,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:16,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:16,684 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-07-20 13:08:16,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:16,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099537584] [2020-07-20 13:08:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:16,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:08:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:16,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 13:08:16,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:08:16,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:16,934 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 1] term [2020-07-20 13:08:16,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:17,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:17,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:08:17,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 13:08:17,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:17,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:17,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 13:08:17,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099537584] [2020-07-20 13:08:17,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:17,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2020-07-20 13:08:17,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536474413] [2020-07-20 13:08:17,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:08:17,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:08:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:08:17,621 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 21 states. [2020-07-20 13:08:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:17,974 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-20 13:08:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:08:17,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-07-20 13:08:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:17,976 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:08:17,976 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 13:08:17,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:08:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 13:08:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-20 13:08:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 13:08:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-20 13:08:17,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-07-20 13:08:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:17,984 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-20 13:08:17,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:08:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-20 13:08:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 13:08:17,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:08:17,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:08:18,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:18,189 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:08:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:08:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-07-20 13:08:18,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:08:18,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718158427] [2020-07-20 13:08:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:18,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:08:18,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:08:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 13:08:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:08:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 13:08:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:08:18,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:19,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:19,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:08:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:08:19,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718158427] [2020-07-20 13:08:19,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:08:19,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2020-07-20 13:08:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072081654] [2020-07-20 13:08:19,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 13:08:19,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:08:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 13:08:19,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:08:19,324 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 28 states. [2020-07-20 13:08:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:08:19,326 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-20 13:08:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:08:19,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-07-20 13:08:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:08:19,327 INFO L225 Difference]: With dead ends: 33 [2020-07-20 13:08:19,327 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:08:19,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-07-20 13:08:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:08:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:08:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:08:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:08:19,328 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-07-20 13:08:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:08:19,329 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:08:19,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 13:08:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:08:19,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:08:19,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:08:19,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:08:19,596 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:08:19,596 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:08:19,596 INFO L271 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-07-20 13:08:19,596 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point L27(lines 27 33) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L271 CegarLoopResult]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-07-20 13:08:19,597 INFO L268 CegarLoopResult]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2020-07-20 13:08:19,598 INFO L271 CegarLoopResult]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2020-07-20 13:08:19,598 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-20 13:08:19,598 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-20 13:08:19,598 INFO L268 CegarLoopResult]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2020-07-20 13:08:19,598 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-20 13:08:19,598 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:08:19,598 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: false [2020-07-20 13:08:19,598 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:08:19,599 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:08:19,599 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 47) no Hoare annotation was computed. [2020-07-20 13:08:19,599 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 49) the Hoare annotation is: true [2020-07-20 13:08:19,599 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 49) no Hoare annotation was computed. [2020-07-20 13:08:19,599 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-07-20 13:08:19,599 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 49) no Hoare annotation was computed. [2020-07-20 13:08:19,600 INFO L268 CegarLoopResult]: For program point L44(lines 44 48) no Hoare annotation was computed. [2020-07-20 13:08:19,600 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-07-20 13:08:19,600 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-20 13:08:19,600 INFO L268 CegarLoopResult]: For program point L39(lines 39 41) no Hoare annotation was computed. [2020-07-20 13:08:19,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:08:19 BoogieIcfgContainer [2020-07-20 13:08:19,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:08:19,610 INFO L168 Benchmark]: Toolchain (without parser) took 6168.57 ms. Allocated memory was 141.6 MB in the beginning and 275.8 MB in the end (delta: 134.2 MB). Free memory was 103.9 MB in the beginning and 219.3 MB in the end (delta: -115.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:19,611 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:08:19,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.17 ms. Allocated memory is still 141.6 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:19,612 INFO L168 Benchmark]: Boogie Preprocessor took 25.29 ms. Allocated memory is still 141.6 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 13:08:19,613 INFO L168 Benchmark]: RCFGBuilder took 380.35 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 170.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:19,614 INFO L168 Benchmark]: TraceAbstraction took 5505.96 ms. Allocated memory was 203.9 MB in the beginning and 275.8 MB in the end (delta: 71.8 MB). Free memory was 169.4 MB in the beginning and 219.3 MB in the end (delta: -50.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:08:19,618 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.17 ms. Allocated memory is still 141.6 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.29 ms. Allocated memory is still 141.6 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 380.35 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 170.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5505.96 ms. Allocated memory was 203.9 MB in the beginning and 275.8 MB in the end (delta: 71.8 MB). Free memory was 169.4 MB in the beginning and 219.3 MB in the end (delta: -50.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: 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 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 78 SDslu, 635 SDs, 0 SdLazy, 466 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 147 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 165 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 26382 SizeOfPredicates, 30 NumberOfNonLiveVariables, 384 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 17/38 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...