/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:14:15,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:14:15,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:14:15,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:14:15,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:14:15,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:14:15,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:14:15,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:14:15,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:14:15,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:14:15,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:14:15,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:14:15,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:14:15,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:14:15,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:14:15,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:14:15,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:14:15,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:14:15,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:14:15,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:14:15,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:14:15,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:14:15,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:14:15,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:14:15,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:14:15,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:14:15,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:14:15,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:14:15,881 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 16:14:15,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:14:15,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:14:15,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:14:15,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:14:15,904 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:14:15,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:14:15,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:14:15,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:14:15,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:14:15,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:14:15,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:14:15,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:14:15,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:14:15,907 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:14:15,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:14:15,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:14:15,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:14:15,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:14:15,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:14:15,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:14:15,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:14:15,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:14:15,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:14:15,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:14:15,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:14:15,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:14:15,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:14:15,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:14:15,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:14:15,910 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_VARIABLES 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 -> 2 [2020-07-21 16:14:16,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:14:16,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:14:16,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:14:16,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:14:16,204 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:14:16,205 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-07-21 16:14:16,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d198e639c/5cd68df9174940708886b27133262fcd/FLAG5c2fb3bb0 [2020-07-21 16:14:16,718 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:14:16,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-07-21 16:14:16,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d198e639c/5cd68df9174940708886b27133262fcd/FLAG5c2fb3bb0 [2020-07-21 16:14:17,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d198e639c/5cd68df9174940708886b27133262fcd [2020-07-21 16:14:17,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:14:17,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:14:17,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:14:17,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:14:17,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:14:17,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20853ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17, skipping insertion in model container [2020-07-21 16:14:17,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:14:17,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:14:17,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:14:17,340 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:14:17,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:14:17,370 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:14:17,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17 WrapperNode [2020-07-21 16:14:17,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:14:17,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:14:17,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:14:17,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:14:17,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (1/1) ... [2020-07-21 16:14:17,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:14:17,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:14:17,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:14:17,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:14:17,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (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 16:14:17,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:14:17,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:14:17,583 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-21 16:14:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:14:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 16:14:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:14:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-21 16:14:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:14:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:14:17,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:14:17,749 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:14:17,749 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:14:17,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:14:17 BoogieIcfgContainer [2020-07-21 16:14:17,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:14:17,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:14:17,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:14:17,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:14:17,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:14:17" (1/3) ... [2020-07-21 16:14:17,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72089531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:14:17, skipping insertion in model container [2020-07-21 16:14:17,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:17" (2/3) ... [2020-07-21 16:14:17,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72089531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:14:17, skipping insertion in model container [2020-07-21 16:14:17,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:14:17" (3/3) ... [2020-07-21 16:14:17,761 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2020-07-21 16:14:17,772 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:14:17,780 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:14:17,794 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:14:17,845 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:14:17,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:14:17,846 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:14:17,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:14:17,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:14:17,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:14:17,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:14:17,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:14:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 16:14:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:14:17,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:14:17,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:14:17,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:14:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:14:17,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-21 16:14:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:14:17,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238422557] [2020-07-21 16:14:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:14:17,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:14:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:14:17,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:14:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:14:18,121 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 16:14:18,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:14:18,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238422557] [2020-07-21 16:14:18,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:14:18,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:14:18,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869085703] [2020-07-21 16:14:18,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:14:18,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:14:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:14:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:14:18,144 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-07-21 16:14:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:14:18,286 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-21 16:14:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:14:18,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 16:14:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:14:18,299 INFO L225 Difference]: With dead ends: 32 [2020-07-21 16:14:18,299 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 16:14:18,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:14:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 16:14:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 16:14:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:14:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 16:14:18,345 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 16:14:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:14:18,345 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 16:14:18,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:14:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 16:14:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 16:14:18,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:14:18,347 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 16:14:18,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:14:18,556 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:14:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:14:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-21 16:14:18,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:14:18,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751442166] [2020-07-21 16:14:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:14:18,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:14:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:14:18,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:14:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:14:18,738 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 16:14:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:14:19,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:14:19,273 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 16:14:19,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751442166] [2020-07-21 16:14:19,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:14:19,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-07-21 16:14:19,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274377736] [2020-07-21 16:14:19,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:14:19,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:14:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:14:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:14:19,278 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 15 states. [2020-07-21 16:14:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:14:19,507 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 16:14:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:14:19,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-07-21 16:14:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:14:19,508 INFO L225 Difference]: With dead ends: 23 [2020-07-21 16:14:19,508 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:14:19,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:14:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:14:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:14:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:14:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:14:19,511 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-21 16:14:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:14:19,511 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:14:19,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:14:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:14:19,511 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:14:19,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:14:19,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:14:19,772 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:14:19,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:14:19,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:14:19,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:14:19,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:14:19,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:14:19,774 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 4 10) no Hoare annotation was computed. [2020-07-21 16:14:19,774 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2020-07-21 16:14:19,774 INFO L268 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-07-21 16:14:19,774 INFO L268 CegarLoopResult]: For program point L5(lines 5 9) no Hoare annotation was computed. [2020-07-21 16:14:19,774 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 4 10) no Hoare annotation was computed. [2020-07-21 16:14:19,775 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 4 10) the Hoare annotation is: true [2020-07-21 16:14:19,775 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-07-21 16:14:19,775 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 19) the Hoare annotation is: true [2020-07-21 16:14:19,775 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 19) no Hoare annotation was computed. [2020-07-21 16:14:19,776 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 16:14:19,776 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 16:14:19,776 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-21 16:14:19,776 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-07-21 16:14:19,776 INFO L268 CegarLoopResult]: For program point L16-2(lines 12 19) no Hoare annotation was computed. [2020-07-21 16:14:19,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:14:19 BoogieIcfgContainer [2020-07-21 16:14:19,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:14:19,785 INFO L168 Benchmark]: Toolchain (without parser) took 2690.55 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 102.5 MB in the beginning and 158.4 MB in the end (delta: -55.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:14:19,786 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 138.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:14:19,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.96 ms. Allocated memory is still 138.4 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:14:19,788 INFO L168 Benchmark]: Boogie Preprocessor took 28.26 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:14:19,789 INFO L168 Benchmark]: RCFGBuilder took 353.07 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 91.5 MB in the beginning and 172.9 MB in the end (delta: -81.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:14:19,790 INFO L168 Benchmark]: TraceAbstraction took 2028.09 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 172.3 MB in the beginning and 158.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:14:19,794 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 138.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.96 ms. Allocated memory is still 138.4 MB. Free memory was 102.1 MB in the beginning and 92.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.26 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.07 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 91.5 MB in the beginning and 172.9 MB in the end (delta: -81.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2028.09 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 172.3 MB in the beginning and 158.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 1.8s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 16 SDslu, 102 SDs, 0 SdLazy, 115 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 13 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 32 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 48 ConstructedInterpolants, 3 QuantifiedInterpolants, 5928 SizeOfPredicates, 14 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 3/8 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...