/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 BIGGEST_EQUIVALENCE_CLASS --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-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:33:18,186 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 22:33:18,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:33:18,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:33:18,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:33:18,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:33:18,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:33:18,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:33:18,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:33:18,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:33:18,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:33:18,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:33:18,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:33:18,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:33:18,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:33:18,239 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 [2020-07-21 22:33:18,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:33:18,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:33:18,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:33:18,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:33:18,256 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:33:18,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:33:18,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:33:18,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:33:18,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:33:18,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:33:18,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:33:18,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:33:18,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:33:18,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:33:18,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:33:18,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:33:18,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:33:18,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:33:18,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:33:18,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:33:18,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:33:18,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:33:18,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:33:18,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:33:18,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:33:18,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:33:18,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:33:18,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:33:18,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:33:18,261 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:33:18,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:33:18,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:33:18,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:33:18,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:33:18,609 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:33:18,611 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 22:33:18,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e699f2e/a3ccc41f406e4ff79b98ec675b44b589/FLAGe3c0bd5a2 [2020-07-21 22:33:19,178 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:33:19,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-07-21 22:33:19,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e699f2e/a3ccc41f406e4ff79b98ec675b44b589/FLAGe3c0bd5a2 [2020-07-21 22:33:19,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e699f2e/a3ccc41f406e4ff79b98ec675b44b589 [2020-07-21 22:33:19,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:33:19,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:33:19,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:33:19,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:33:19,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:33:19,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437af1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19, skipping insertion in model container [2020-07-21 22:33:19,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:33:19,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:33:19,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:33:19,835 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:33:19,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:33:19,861 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:33:19,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19 WrapperNode [2020-07-21 22:33:19,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:33:19,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:33:19,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:33:19,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:33:19,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (1/1) ... [2020-07-21 22:33:19,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:33:19,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:33:19,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:33:19,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:33:19,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (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 [2020-07-21 22:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 22:33:20,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:33:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 22:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:33:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:33:20,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:33:20,234 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:33:20,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:33:20 BoogieIcfgContainer [2020-07-21 22:33:20,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:33:20,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:33:20,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:33:20,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:33:20,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:33:19" (1/3) ... [2020-07-21 22:33:20,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ede0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:33:20, skipping insertion in model container [2020-07-21 22:33:20,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:33:19" (2/3) ... [2020-07-21 22:33:20,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ede0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:33:20, skipping insertion in model container [2020-07-21 22:33:20,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:33:20" (3/3) ... [2020-07-21 22:33:20,247 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-07-21 22:33:20,260 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:33:20,270 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:33:20,287 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:33:20,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:33:20,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:33:20,319 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:33:20,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:33:20,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:33:20,320 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:33:20,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:33:20,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:33:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 22:33:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:33:20,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:33:20,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:33:20,356 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:33:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:33:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 22:33:20,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:33:20,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274251912] [2020-07-21 22:33:20,389 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 [2020-07-21 22:33:20,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:33:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:33:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:33:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:33:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:33:20,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:33:20,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274251912] [2020-07-21 22:33:20,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:33:20,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:33:20,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128053193] [2020-07-21 22:33:20,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:33:20,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:33:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:33:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:33:20,626 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 22:33:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:33:20,720 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 22:33:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:33:20,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:33:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:33:20,734 INFO L225 Difference]: With dead ends: 30 [2020-07-21 22:33:20,735 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 22:33:20,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:33:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 22:33:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 22:33:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 22:33:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 22:33:20,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 22:33:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:33:20,790 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 22:33:20,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:33:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 22:33:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:33:20,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:33:20,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:33:21,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:33:21,009 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:33:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:33:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 22:33:21,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:33:21,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413759963] [2020-07-21 22:33:21,012 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 [2020-07-21 22:33:21,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:33:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:33:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:33:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:33:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 22:33:21,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:33:21,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:33:21,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413759963] [2020-07-21 22:33:21,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:33:21,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 22:33:21,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939249035] [2020-07-21 22:33:21,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 22:33:21,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:33:21,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 22:33:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 22:33:21,339 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-21 22:33:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:33:21,405 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 22:33:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:33:21,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 22:33:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:33:21,407 INFO L225 Difference]: With dead ends: 25 [2020-07-21 22:33:21,407 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:33:21,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:33:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:33:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:33:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:33:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-21 22:33:21,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-21 22:33:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:33:21,418 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-21 22:33:21,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 22:33:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-21 22:33:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:33:21,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:33:21,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:33:21,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:33:21,635 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:33:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:33:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-21 22:33:21,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:33:21,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175043615] [2020-07-21 22:33:21,637 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 [2020-07-21 22:33:21,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:33:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:33:21,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 22:33:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:33:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:33:21,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:33:22,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:22,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,392 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 22:33:22,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:22,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:22,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 22:33:22,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:33:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175043615] [2020-07-21 22:33:22,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:33:22,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2020-07-21 22:33:22,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66440646] [2020-07-21 22:33:22,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:33:22,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:33:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:33:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:33:22,508 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2020-07-21 22:33:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:33:22,816 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-21 22:33:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:33:22,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2020-07-21 22:33:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:33:22,818 INFO L225 Difference]: With dead ends: 28 [2020-07-21 22:33:22,818 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 22:33:22,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:33:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 22:33:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 22:33:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 22:33:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 22:33:22,828 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-21 22:33:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:33:22,829 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 22:33:22,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:33:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 22:33:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 22:33:22,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:33:22,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:33:23,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:33:23,045 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:33:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:33:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-21 22:33:23,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:33:23,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367027189] [2020-07-21 22:33:23,048 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 [2020-07-21 22:33:23,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:33:23,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:33:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:33:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:33:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 22:33:23,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:33:23,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:23,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:23,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:33:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:33:23,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367027189] [2020-07-21 22:33:23,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:33:23,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2020-07-21 22:33:23,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936828941] [2020-07-21 22:33:23,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:33:23,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:33:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:33:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:33:23,403 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-21 22:33:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:33:23,459 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-21 22:33:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:33:23,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-21 22:33:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:33:23,460 INFO L225 Difference]: With dead ends: 24 [2020-07-21 22:33:23,461 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:33:23,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:33:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:33:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:33:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:33:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:33:23,463 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 22:33:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:33:23,463 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:33:23,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:33:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:33:23,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:33:23,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:33:23,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:33:23,762 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:33:23,762 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:33:23,763 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:33:23,763 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:33:23,763 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:33:23,763 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:33:23,763 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-21 22:33:23,763 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2020-07-21 22:33:23,764 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-21 22:33:23,765 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-21 22:33:23,765 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-21 22:33:23,765 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-21 22:33:23,765 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 22:33:23,765 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 22:33:23,766 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 22:33:23,766 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-21 22:33:23,766 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-21 22:33:23,766 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 2 main_~a~0) [2020-07-21 22:33:23,766 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 22:33:23,766 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 22:33:23,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:33:23 BoogieIcfgContainer [2020-07-21 22:33:23,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:33:23,781 INFO L168 Benchmark]: Toolchain (without parser) took 4217.35 ms. Allocated memory was 145.2 MB in the beginning and 246.4 MB in the end (delta: 101.2 MB). Free memory was 103.3 MB in the beginning and 142.3 MB in the end (delta: -39.0 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,783 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.82 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,792 INFO L168 Benchmark]: Boogie Preprocessor took 24.37 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,795 INFO L168 Benchmark]: RCFGBuilder took 351.83 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 170.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,797 INFO L168 Benchmark]: TraceAbstraction took 3536.05 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 169.4 MB in the beginning and 142.3 MB in the end (delta: 27.1 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:33:23,805 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.82 ms. Allocated memory is still 145.2 MB. Free memory was 102.9 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.37 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.83 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 170.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3536.05 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 169.4 MB in the beginning and 142.3 MB in the end (delta: 27.1 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 51 SDslu, 212 SDs, 0 SdLazy, 226 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 88 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 14016 SizeOfPredicates, 19 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 60/96 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...