/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:11:50,203 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 22:11:50,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:11:50,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:11:50,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:11:50,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:11:50,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:11:50,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:11:50,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:11:50,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:11:50,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:11:50,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:11:50,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:11:50,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:11:50,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:11:50,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:11:50,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:11:50,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:11:50,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:11:50,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:11:50,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:11:50,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:11:50,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:11:50,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:11:50,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:11:50,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:11:50,276 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 [2020-08-21 22:11:50,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:11:50,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:11:50,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:11:50,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:11:50,317 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:11:50,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:11:50,317 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:11:50,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:11:50,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:11:50,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:11:50,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:11:50,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:11:50,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:11:50,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:11:50,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:11:50,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:11:50,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:11:50,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:11:50,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:11:50,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:11:50,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:11:50,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:11:50,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:11:50,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:11:50,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:11:50,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:11:50,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:11:50,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:11:50,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:11:50,323 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=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:11:50,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:11:50,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:11:50,692 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:11:50,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:11:50,694 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:11:50,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-21 22:11:50,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69666157/e65059c290da4930a4eb81e57bea04d8/FLAGf17c99c06 [2020-08-21 22:11:51,162 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:11:51,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-08-21 22:11:51,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69666157/e65059c290da4930a4eb81e57bea04d8/FLAGf17c99c06 [2020-08-21 22:11:51,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c69666157/e65059c290da4930a4eb81e57bea04d8 [2020-08-21 22:11:51,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:11:51,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:11:51,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:51,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:11:51,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:11:51,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:51,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700715c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51, skipping insertion in model container [2020-08-21 22:11:51,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:51,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:11:51,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:11:51,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:51,886 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:11:51,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:11:51,915 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:11:51,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51 WrapperNode [2020-08-21 22:11:51,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:11:51,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:11:51,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:11:51,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:11:52,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (1/1) ... [2020-08-21 22:11:52,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:11:52,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:11:52,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:11:52,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:11:52,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (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 [2020-08-21 22:11:52,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:11:52,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:11:52,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:11:52,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:11:52,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:11:52,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:11:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:11:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:11:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:11:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:11:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:11:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:11:52,452 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:11:52,452 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:11:52,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:52 BoogieIcfgContainer [2020-08-21 22:11:52,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:11:52,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:11:52,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:11:52,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:11:52,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:11:51" (1/3) ... [2020-08-21 22:11:52,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605a882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:52, skipping insertion in model container [2020-08-21 22:11:52,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:51" (2/3) ... [2020-08-21 22:11:52,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2605a882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:52, skipping insertion in model container [2020-08-21 22:11:52,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:52" (3/3) ... [2020-08-21 22:11:52,493 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-08-21 22:11:52,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:11:52,532 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:11:52,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:11:52,590 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:11:52,591 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:11:52,591 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:11:52,591 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:11:52,591 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:11:52,591 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:11:52,591 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:11:52,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:11:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-21 22:11:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:11:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:52,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:52,620 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-21 22:11:52,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:52,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836153676] [2020-08-21 22:11:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:52,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836153676] [2020-08-21 22:11:52,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:52,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:11:52,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372836294] [2020-08-21 22:11:52,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:11:52,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:11:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:11:52,930 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-21 22:11:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:53,037 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-21 22:11:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:11:53,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:11:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:53,050 INFO L225 Difference]: With dead ends: 34 [2020-08-21 22:11:53,050 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:11:53,054 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 [2020-08-21 22:11:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:11:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-21 22:11:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 22:11:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-21 22:11:53,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-21 22:11:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:53,096 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-21 22:11:53,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:11:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-21 22:11:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:11:53,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:53,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:53,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:11:53,098 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-21 22:11:53,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:53,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211380430] [2020-08-21 22:11:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:53,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:11:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:11:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:11:53,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211380430] [2020-08-21 22:11:53,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:11:53,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:11:53,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21079002] [2020-08-21 22:11:53,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:11:53,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:11:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:11:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:11:53,211 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-21 22:11:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:11:53,327 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-08-21 22:11:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:11:53,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-21 22:11:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:11:53,329 INFO L225 Difference]: With dead ends: 22 [2020-08-21 22:11:53,329 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 22:11:53,330 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 [2020-08-21 22:11:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 22:11:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 22:11:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 22:11:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-21 22:11:53,335 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-21 22:11:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:11:53,336 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-21 22:11:53,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:11:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-21 22:11:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:11:53,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:11:53,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:11:53,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:11:53,338 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:11:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:11:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-21 22:11:53,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:11:53,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44527948] [2020-08-21 22:11:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:11:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:11:53,365 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:11:53,366 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:11:53,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:11:53,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:11:53 BoogieIcfgContainer [2020-08-21 22:11:53,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:11:53,392 INFO L168 Benchmark]: Toolchain (without parser) took 1822.26 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 102.8 MB in the beginning and 111.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,394 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.50 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,396 INFO L168 Benchmark]: Boogie Preprocessor took 131.40 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.6 MB in the beginning and 179.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,397 INFO L168 Benchmark]: RCFGBuilder took 408.36 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 165.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,398 INFO L168 Benchmark]: TraceAbstraction took 917.68 ms. Allocated memory is still 201.9 MB. Free memory was 164.7 MB in the beginning and 111.3 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:11:53,402 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 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.50 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.40 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.6 MB in the beginning and 179.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.36 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 165.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 917.68 ms. Allocated memory is still 201.9 MB. Free memory was 164.7 MB in the beginning and 111.3 MB in the end (delta: 53.3 MB). Peak memory consumption was 53.3 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: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, 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, 0.1s 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, 0.0s 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...