/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:28,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:28,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:28,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:28,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:28,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:28,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:28,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:28,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:28,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:28,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:28,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:28,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:28,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:28,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:28,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:28,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:28,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:28,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:28,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:28,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:28,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:28,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:28,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:28,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:21:28,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:28,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:28,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:28,282 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 11:21:28,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:28,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:28,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:28,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:28,321 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:28,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:28,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:28,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:28,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:28,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:28,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:28,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:28,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:28,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:28,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:28,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:28,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:28,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:28,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:28,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:28,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:28,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:28,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:28,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:28,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:28,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:28,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:28,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:28,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:28,326 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 -> NOT_INCREMENTALLY [2020-07-21 11:21:28,631 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:28,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:28,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:28,653 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:28,654 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:28,655 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test04.c [2020-07-21 11:21:28,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0de76046/025d4d2b5e9049158bd74ba46a0f9919/FLAGd9a1bed6e [2020-07-21 11:21:29,291 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:29,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test04.c [2020-07-21 11:21:29,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0de76046/025d4d2b5e9049158bd74ba46a0f9919/FLAGd9a1bed6e [2020-07-21 11:21:29,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0de76046/025d4d2b5e9049158bd74ba46a0f9919 [2020-07-21 11:21:29,626 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:29,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:29,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:29,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:29,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:29,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:29,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41361c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29, skipping insertion in model container [2020-07-21 11:21:29,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:29,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:29,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:21:29,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:29,871 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:21:29,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:29,903 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:21:29,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29 WrapperNode [2020-07-21 11:21:29,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:29,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:21:29,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:21:29,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:21:30,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (1/1) ... [2020-07-21 11:21:30,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:21:30,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:21:30,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:21:30,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:21:30,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (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 11:21:30,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:21:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:21:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 11:21:30,105 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:21:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:21:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 11:21:30,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:21:30,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:21:30,318 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:21:30,319 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:21:30,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:30 BoogieIcfgContainer [2020-07-21 11:21:30,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:21:30,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:21:30,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:21:30,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:21:30,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:29" (1/3) ... [2020-07-21 11:21:30,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac0a909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:30, skipping insertion in model container [2020-07-21 11:21:30,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:29" (2/3) ... [2020-07-21 11:21:30,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac0a909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:30, skipping insertion in model container [2020-07-21 11:21:30,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:30" (3/3) ... [2020-07-21 11:21:30,335 INFO L109 eAbstractionObserver]: Analyzing ICFG test04.c [2020-07-21 11:21:30,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:21:30,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:21:30,373 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:21:30,400 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:21:30,401 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:21:30,401 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:21:30,401 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:21:30,401 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:21:30,401 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:21:30,402 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:21:30,402 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:21:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 11:21:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:21:30,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:30,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:30,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1498735640, now seen corresponding path program 1 times [2020-07-21 11:21:30,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:30,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782282654] [2020-07-21 11:21:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:21:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:21:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:30,696 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-21 11:21:30,700 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:21:30,719 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:21:30,720 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:21:30,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-21 11:21:30,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:21:30,916 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 11:21:30,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:30,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782282654] [2020-07-21 11:21:30,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:30,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:21:30,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068395476] [2020-07-21 11:21:30,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:21:30,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:30,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:21:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:21:30,946 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-07-21 11:21:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:31,080 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-07-21 11:21:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:21:31,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 11:21:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:31,100 INFO L225 Difference]: With dead ends: 22 [2020-07-21 11:21:31,100 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:21:31,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:21:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:21:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:21:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:21:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:21:31,150 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-21 11:21:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:31,151 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:21:31,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:21:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:21:31,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:21:31,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:31,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:21:31,485 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:31,486 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:31,486 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:31,486 INFO L268 CegarLoopResult]: For program point fEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 11:21:31,487 INFO L271 CegarLoopResult]: At program point fENTRY(lines 4 6) the Hoare annotation is: true [2020-07-21 11:21:31,487 INFO L268 CegarLoopResult]: For program point fFINAL(lines 4 6) no Hoare annotation was computed. [2020-07-21 11:21:31,487 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:31,487 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:21:31,488 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:31,488 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:31,488 INFO L264 CegarLoopResult]: At program point L17(lines 8 24) the Hoare annotation is: false [2020-07-21 11:21:31,488 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 11:21:31,489 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 22) no Hoare annotation was computed. [2020-07-21 11:21:31,489 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (= main_~p1~0.base |main_~#a~0.base|) (= main_~p1~0.offset |main_~#a~0.offset|) (not (= main_~p2~0.base |main_~#a~0.base|))) [2020-07-21 11:21:31,489 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 24) the Hoare annotation is: true [2020-07-21 11:21:31,490 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-21 11:21:31,490 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 24) no Hoare annotation was computed. [2020-07-21 11:21:31,490 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 24) no Hoare annotation was computed. [2020-07-21 11:21:31,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:31 BoogieIcfgContainer [2020-07-21 11:21:31,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:31,532 INFO L168 Benchmark]: Toolchain (without parser) took 1902.09 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.5 MB in the beginning and 120.7 MB in the end (delta: -20.2 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,534 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.91 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 90.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,542 INFO L168 Benchmark]: Boogie Preprocessor took 130.44 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 180.4 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,543 INFO L168 Benchmark]: RCFGBuilder took 287.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 166.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,545 INFO L168 Benchmark]: TraceAbstraction took 1196.99 ms. Allocated memory is still 201.9 MB. Free memory was 165.8 MB in the beginning and 120.7 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:31,550 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.91 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 90.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.44 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 180.4 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 166.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1196.99 ms. Allocated memory is still 201.9 MB. Free memory was 165.8 MB in the beginning and 120.7 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 22]: 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 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 43 SDs, 0 SdLazy, 13 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 17 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 636 SizeOfPredicates, 11 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...