/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:56:06,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:56:06,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:56:06,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:56:06,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:56:06,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:56:06,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:56:06,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:56:06,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:56:06,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:56:06,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:56:06,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:56:06,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:56:06,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:56:06,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:56:06,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:56:06,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:56:06,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:56:06,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:56:06,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:56:06,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:56:06,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:56:06,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:56:06,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:56:06,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:56:06,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:56:06,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:56:06,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:56:06,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:56:06,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:56:06,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:56:06,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:56:06,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:56:06,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:56:06,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:56:06,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:56:06,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:56:06,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:56:06,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:56:06,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:56:06,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:56:06,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:56:06,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:56:06,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:56:06,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:56:06,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:56:06,496 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:56:06,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:56:06,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:56:06,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:56:06,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:56:06,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:56:06,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:56:06,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:56:06,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:56:06,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:56:06,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:56:06,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:56:06,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:56:06,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:56:06,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:56:06,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:56:06,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:56:06,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:56:06,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:56:06,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:56:06,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:56:06,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:56:06,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:56:06,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:56:06,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:56:06,501 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:56:06,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:56:06,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:56:06,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:56:06,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:56:06,828 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:56:06,829 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-18 21:56:06,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89f10873/c879fae6c6d049178fa485ad1a947298/FLAGc283009c9 [2020-08-18 21:56:07,326 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:56:07,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-18 21:56:07,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89f10873/c879fae6c6d049178fa485ad1a947298/FLAGc283009c9 [2020-08-18 21:56:07,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89f10873/c879fae6c6d049178fa485ad1a947298 [2020-08-18 21:56:07,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:56:07,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:56:07,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:56:07,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:56:07,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:56:07,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:07,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d9305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07, skipping insertion in model container [2020-08-18 21:56:07,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:07,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:56:07,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:56:07,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:56:07,962 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:56:07,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:56:07,993 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:56:07,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07 WrapperNode [2020-08-18 21:56:07,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:56:07,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:56:07,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:56:07,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:56:08,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... [2020-08-18 21:56:08,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:56:08,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:56:08,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:56:08,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:56:08,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:56:08,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:56:08,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:56:08,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:56:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:56:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:56:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:56:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:56:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:56:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:56:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:56:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:56:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:56:08,421 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:56:08,421 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 21:56:08,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:56:08 BoogieIcfgContainer [2020-08-18 21:56:08,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:56:08,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:56:08,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:56:08,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:56:08,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:56:07" (1/3) ... [2020-08-18 21:56:08,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540e82f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:56:08, skipping insertion in model container [2020-08-18 21:56:08,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:56:07" (2/3) ... [2020-08-18 21:56:08,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540e82f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:56:08, skipping insertion in model container [2020-08-18 21:56:08,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:56:08" (3/3) ... [2020-08-18 21:56:08,434 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-08-18 21:56:08,445 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:56:08,452 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:56:08,467 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:56:08,493 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:56:08,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:56:08,493 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:56:08,493 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:56:08,493 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:56:08,494 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:56:08,494 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:56:08,494 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:56:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-18 21:56:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:56:08,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:56:08,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:56:08,520 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:56:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:56:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-18 21:56:08,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:56:08,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942712712] [2020-08-18 21:56:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:56:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:56:08,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:56:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:56:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:56:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942712712] [2020-08-18 21:56:08,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:56:08,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 21:56:08,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383787439] [2020-08-18 21:56:08,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:56:08,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:56:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:56:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:56:08,801 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-18 21:56:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:56:09,030 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-18 21:56:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:56:09,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 21:56:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:56:09,042 INFO L225 Difference]: With dead ends: 34 [2020-08-18 21:56:09,042 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 21:56:09,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:56:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 21:56:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-18 21:56:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 21:56:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 21:56:09,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-18 21:56:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:56:09,080 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 21:56:09,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:56:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 21:56:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:56:09,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:56:09,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:56:09,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:56:09,082 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:56:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:56:09,083 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-18 21:56:09,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:56:09,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94991006] [2020-08-18 21:56:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:56:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:56:09,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:56:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:56:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:56:09,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94991006] [2020-08-18 21:56:09,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:56:09,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:56:09,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51385751] [2020-08-18 21:56:09,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:56:09,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:56:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:56:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:56:09,218 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-18 21:56:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:56:09,360 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-08-18 21:56:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:56:09,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-18 21:56:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:56:09,362 INFO L225 Difference]: With dead ends: 22 [2020-08-18 21:56:09,362 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 21:56:09,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:56:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 21:56:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 21:56:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 21:56:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-18 21:56:09,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-18 21:56:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:56:09,370 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-18 21:56:09,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:56:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-18 21:56:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:56:09,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:56:09,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:56:09,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:56:09,374 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:56:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:56:09,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-18 21:56:09,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:56:09,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31548288] [2020-08-18 21:56:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:56:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:56:09,431 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:56:09,432 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:56:09,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:56:09,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:56:09 BoogieIcfgContainer [2020-08-18 21:56:09,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:56:09,468 INFO L168 Benchmark]: Toolchain (without parser) took 1728.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 113.1 MB in the end (delta: -10.2 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:56:09,469 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:56:09,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.89 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 92.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:56:09,471 INFO L168 Benchmark]: Boogie Preprocessor took 135.77 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.3 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:56:09,473 INFO L168 Benchmark]: RCFGBuilder took 294.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 166.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:56:09,474 INFO L168 Benchmark]: TraceAbstraction took 1036.23 ms. Allocated memory is still 203.4 MB. Free memory was 166.3 MB in the beginning and 113.1 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:56:09,483 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.89 ms. Allocated memory is still 140.5 MB. Free memory was 102.7 MB in the beginning and 92.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.77 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 181.3 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 166.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1036.23 ms. Allocated memory is still 203.4 MB. Free memory was 166.3 MB in the beginning and 113.1 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; [L14] int n = __VERIFIER_nondet_int(); [L15] EXPR n ? &d1 : &d2 [L15] union dummy *pd = n ? &d1 : &d2; [L16] d1.a = __VERIFIER_nondet_int() [L17] COND FALSE !(pd == &d1) [L20] pd->b = 0 [L22] pd == &d2 && d1.a != 0 [L22] EXPR d1.a [L22] pd == &d2 && d1.a != 0 [L22] COND TRUE pd == &d2 && d1.a != 0 [L28] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 12 SDslu, 59 SDs, 0 SdLazy, 84 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...