/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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:29:58,170 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 11:29:58,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:29:58,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:29:58,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:29:58,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:29:58,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:29:58,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:29:58,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:29:58,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:29:58,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:29:58,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:29:58,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:29:58,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:29:58,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:29:58,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:29:58,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:29:58,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:29:58,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:29:58,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:29:58,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:29:58,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:29:58,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:29:58,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:29:58,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:29:58,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:29:58,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:29:58,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:29:58,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:29:58,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:29:58,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:29:58,237 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:29:58,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:29:58,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:29:58,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:29:58,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:29:58,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:29:58,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:29:58,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:29:58,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:29:58,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:29:58,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:29:58,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:29:58,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:29:58,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:29:58,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:29:58,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:29:58,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:29:58,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:29:58,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:29:58,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:29:58,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:29:58,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:29:58,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:29:58,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:29:58,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:29:58,242 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 [2020-07-20 11:29:58,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:29:58,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:29:58,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:29:58,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:29:58,603 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:29:58,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-20 11:29:58,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba7f3a40/29e1b5ee53eb49988c0fc10433ef00fb/FLAGfebef8255 [2020-07-20 11:29:59,115 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:29:59,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-20 11:29:59,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba7f3a40/29e1b5ee53eb49988c0fc10433ef00fb/FLAGfebef8255 [2020-07-20 11:29:59,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba7f3a40/29e1b5ee53eb49988c0fc10433ef00fb [2020-07-20 11:29:59,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:29:59,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:29:59,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:29:59,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:29:59,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:29:59,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723c46bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59, skipping insertion in model container [2020-07-20 11:29:59,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:29:59,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:29:59,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:29:59,775 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:29:59,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:29:59,816 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:29:59,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59 WrapperNode [2020-07-20 11:29:59,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:29:59,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:29:59,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:29:59,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:29:59,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... [2020-07-20 11:29:59,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:29:59,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:29:59,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:29:59,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:29:59,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:30:00,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:30:00,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:30:00,023 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-20 11:30:00,023 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-20 11:30:00,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:30:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:30:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-20 11:30:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:30:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:30:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:30:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-20 11:30:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:30:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:30:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:30:00,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:30:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:30:00,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:30:00,381 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:30:00,381 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:30:00,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:00 BoogieIcfgContainer [2020-07-20 11:30:00,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:30:00,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:30:00,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:30:00,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:30:00,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:29:59" (1/3) ... [2020-07-20 11:30:00,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658b842c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:00, skipping insertion in model container [2020-07-20 11:30:00,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:29:59" (2/3) ... [2020-07-20 11:30:00,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658b842c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:30:00, skipping insertion in model container [2020-07-20 11:30:00,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:30:00" (3/3) ... [2020-07-20 11:30:00,397 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-20 11:30:00,408 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:30:00,417 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:30:00,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:30:00,453 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:30:00,453 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:30:00,453 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:30:00,453 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:30:00,453 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:30:00,453 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:30:00,454 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:30:00,454 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:30:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 11:30:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:30:00,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:00,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:00,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1199829752, now seen corresponding path program 1 times [2020-07-20 11:30:00,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:00,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240593492] [2020-07-20 11:30:00,493 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 [2020-07-20 11:30:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:30:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:30:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:30:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:30:00,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:30:00,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240593492] [2020-07-20 11:30:00,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:30:00,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:30:00,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522181045] [2020-07-20 11:30:00,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:30:00,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:30:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:30:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:30:00,728 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 11:30:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:30:00,817 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 11:30:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:30:00,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:30:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:30:00,833 INFO L225 Difference]: With dead ends: 34 [2020-07-20 11:30:00,833 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 11:30:00,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:30:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 11:30:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 11:30:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 11:30:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-07-20 11:30:00,878 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2020-07-20 11:30:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:30:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-07-20 11:30:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:30:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-07-20 11:30:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:30:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:30:00,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:30:01,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:01,091 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:30:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:30:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2114164890, now seen corresponding path program 1 times [2020-07-20 11:30:01,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:30:01,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009381602] [2020-07-20 11:30:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:30:01,255 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:30:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:30:01,308 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:30:01,347 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:30:01,347 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:30:01,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:30:01,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:30:01 BoogieIcfgContainer [2020-07-20 11:30:01,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:30:01,590 INFO L168 Benchmark]: Toolchain (without parser) took 2065.52 ms. Allocated memory was 143.1 MB in the beginning and 198.7 MB in the end (delta: 55.6 MB). Free memory was 100.6 MB in the beginning and 104.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,591 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.92 ms. Allocated memory is still 143.1 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,593 INFO L168 Benchmark]: Boogie Preprocessor took 142.91 ms. Allocated memory was 143.1 MB in the beginning and 198.7 MB in the end (delta: 55.6 MB). Free memory was 90.4 MB in the beginning and 176.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,594 INFO L168 Benchmark]: RCFGBuilder took 423.75 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 156.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,595 INFO L168 Benchmark]: TraceAbstraction took 1200.72 ms. Allocated memory is still 198.7 MB. Free memory was 156.5 MB in the beginning and 104.5 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:30:01,599 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.92 ms. Allocated memory is still 143.1 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.91 ms. Allocated memory was 143.1 MB in the beginning and 198.7 MB in the end (delta: 55.6 MB). Free memory was 90.4 MB in the beginning and 176.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 423.75 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 156.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1200.72 ms. Allocated memory is still 198.7 MB. Free memory was 156.5 MB in the beginning and 104.5 MB in the end (delta: 52.1 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) VAL [\read(a)=4, a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={2:0}, p2={3:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L13] CALL g(p1, p2) VAL [p1={2:0}, p2={3:0}] [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 VAL [p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}, pq={5:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={4:0}, b={5:0}, f(a, &p1, &p2)=1, p1={2:0}, p2={3:0}] [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) VAL [\read(*p1)={5:0}, \read(*p1)=0, a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() VAL [a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 53 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 299 SizeOfPredicates, 6 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 8 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 incorrect! Received shutdown request...