/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 false -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-eb0fd7c [2020-09-21 10:21:25,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:25,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:25,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:25,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:25,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:25,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:25,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:25,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:25,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:25,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:25,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:25,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:25,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:25,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:25,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:25,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:25,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:25,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:25,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:25,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:25,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:25,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:25,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:25,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:21:25,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:25,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:25,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:25,733 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 [2020-09-21 10:21:25,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:25,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:25,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:25,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:25,781 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:25,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:25,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:25,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:25,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:25,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:25,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:25,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:25,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:25,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:25,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:25,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:25,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:25,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:25,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:25,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:25,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:25,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:25,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:25,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:25,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:25,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:25,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:25,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:25,787 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 -> false [2020-09-21 10:21:26,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:26,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:26,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:26,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:26,304 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:26,305 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-21 10:21:26,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4c9112f2/cf083d4553864f0489892b789cce7ebb/FLAG885abfa86 [2020-09-21 10:21:26,957 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:26,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-21 10:21:26,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4c9112f2/cf083d4553864f0489892b789cce7ebb/FLAG885abfa86 [2020-09-21 10:21:27,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4c9112f2/cf083d4553864f0489892b789cce7ebb [2020-09-21 10:21:27,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:27,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:27,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:27,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:27,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c82f562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27, skipping insertion in model container [2020-09-21 10:21:27,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:27,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:27,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,619 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:27,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,656 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:27,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27 WrapperNode [2020-09-21 10:21:27,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:27,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:27,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:27,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:27,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:27,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (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 [2020-09-21 10:21:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:21:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:21:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:21:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:28,151 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:28,151 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:21:28,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28 BoogieIcfgContainer [2020-09-21 10:21:28,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:28,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:28,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:28,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:28,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:27" (1/3) ... [2020-09-21 10:21:28,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593d37e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (2/3) ... [2020-09-21 10:21:28,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593d37e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28" (3/3) ... [2020-09-21 10:21:28,177 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-09-21 10:21:28,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:28,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:21:28,243 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:21:28,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:28,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:28,279 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:28,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:28,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:28,279 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:28,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:28,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-21 10:21:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,316 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-09-21 10:21:28,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458023276] [2020-09-21 10:21:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:28,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458023276] [2020-09-21 10:21:28,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:28,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:28,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799622361] [2020-09-21 10:21:28,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:28,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:28,645 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-09-21 10:21:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:28,812 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-09-21 10:21:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:28,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:21:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:28,830 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:21:28,830 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:21:28,835 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 [2020-09-21 10:21:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:21:28,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-09-21 10:21:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 10:21:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 10:21:28,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-09-21 10:21:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:28,893 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 10:21:28,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 10:21:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:28,895 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-09-21 10:21:28,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150176740] [2020-09-21 10:21:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:29,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150176740] [2020-09-21 10:21:29,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:29,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:29,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290687008] [2020-09-21 10:21:29,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:29,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:29,022 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-09-21 10:21:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:29,129 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-09-21 10:21:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:21:29,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-21 10:21:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:29,130 INFO L225 Difference]: With dead ends: 22 [2020-09-21 10:21:29,131 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 10:21:29,132 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 [2020-09-21 10:21:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 10:21:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 10:21:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 10:21:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-09-21 10:21:29,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-09-21 10:21:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:29,137 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-09-21 10:21:29,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-09-21 10:21:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:29,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:29,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:29,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:29,139 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:29,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:29,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-09-21 10:21:29,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:29,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386964108] [2020-09-21 10:21:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:21:29,167 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:21:29,168 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:21:29,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:29,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:29 BoogieIcfgContainer [2020-09-21 10:21:29,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:29,199 INFO L168 Benchmark]: Toolchain (without parser) took 1871.51 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 102.6 MB in the beginning and 112.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,201 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:29,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.91 ms. Allocated memory is still 146.8 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,203 INFO L168 Benchmark]: Boogie Preprocessor took 133.96 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 180.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,204 INFO L168 Benchmark]: RCFGBuilder took 367.24 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,205 INFO L168 Benchmark]: TraceAbstraction took 1030.58 ms. Allocated memory is still 202.4 MB. Free memory was 165.7 MB in the beginning and 112.3 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,209 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.91 ms. Allocated memory is still 146.8 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.96 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.1 MB in the beginning and 180.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.24 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1030.58 ms. Allocated memory is still 202.4 MB. Free memory was 165.7 MB in the beginning and 112.3 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 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: 0.3s, 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...