/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:27:17,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:27:17,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:27:17,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:27:17,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:27:17,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:27:17,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:27:17,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:27:17,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:27:17,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:27:17,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:27:17,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:27:17,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:27:17,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:27:17,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:27:17,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:27:17,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:27:17,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:27:17,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:27:17,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:27:17,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:27:17,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:27:17,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:27:17,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:27:17,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:27:17,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:27:17,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:27:17,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:27:17,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:27:17,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:27:17,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:27:17,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:27:17,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:27:17,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:27:17,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:27:17,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:27:17,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:27:17,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:27:17,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:27:17,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:27:17,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:27:17,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:27:17,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:27:17,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:27:17,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:27:17,586 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:27:17,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:27:17,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:27:17,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:27:17,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:27:17,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:27:17,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:27:17,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:27:17,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:27:17,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:27:17,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:27:17,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:27:17,591 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:27:17,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:27:17,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:27:17,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:27:17,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:27:17,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:27:17,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:27:17,592 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-17 17:27:17,875 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:27:17,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:27:17,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:27:17,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:27:17,904 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:27:17,904 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-17 17:27:17,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6088fe4/56652b3602384a0989cc7626e34c5867/FLAGa5b487cc2 [2020-07-17 17:27:18,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:27:18,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-17 17:27:18,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6088fe4/56652b3602384a0989cc7626e34c5867/FLAGa5b487cc2 [2020-07-17 17:27:18,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6088fe4/56652b3602384a0989cc7626e34c5867 [2020-07-17 17:27:18,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:27:18,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:27:18,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:27:18,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:27:18,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:27:18,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:27:18" (1/1) ... [2020-07-17 17:27:18,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e655e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:18, skipping insertion in model container [2020-07-17 17:27:18,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:27:18" (1/1) ... [2020-07-17 17:27:18,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:27:18,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:27:19,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:27:19,094 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:27:19,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:27:19,133 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:27:19,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19 WrapperNode [2020-07-17 17:27:19,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:27:19,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:27:19,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:27:19,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:27:19,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... [2020-07-17 17:27:19,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:27:19,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:27:19,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:27:19,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:27:19,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:27:19,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:27:19,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:27:19,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:27:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:27:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:27:19,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:27:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:27:19,589 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:27:19,589 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:27:19,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:27:19 BoogieIcfgContainer [2020-07-17 17:27:19,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:27:19,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:27:19,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:27:19,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:27:19,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:27:18" (1/3) ... [2020-07-17 17:27:19,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b9f3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:27:19, skipping insertion in model container [2020-07-17 17:27:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:19" (2/3) ... [2020-07-17 17:27:19,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b9f3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:27:19, skipping insertion in model container [2020-07-17 17:27:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:27:19" (3/3) ... [2020-07-17 17:27:19,606 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-07-17 17:27:19,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:27:19,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:27:19,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:27:19,669 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:27:19,670 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:27:19,670 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:27:19,670 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:27:19,670 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:27:19,670 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:27:19,671 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:27:19,671 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:27:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-17 17:27:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 17:27:19,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:19,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:27:19,710 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times [2020-07-17 17:27:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:19,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807204304] [2020-07-17 17:27:19,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:19,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807204304] [2020-07-17 17:27:19,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:27:19,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 17:27:19,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049189305] [2020-07-17 17:27:19,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 17:27:19,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 17:27:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:27:20,002 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-07-17 17:27:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:20,154 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-07-17 17:27:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 17:27:20,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-17 17:27:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:20,167 INFO L225 Difference]: With dead ends: 57 [2020-07-17 17:27:20,168 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 17:27:20,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:27:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 17:27:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-17 17:27:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 17:27:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-07-17 17:27:20,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-07-17 17:27:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:20,215 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-07-17 17:27:20,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 17:27:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-07-17 17:27:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 17:27:20,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:20,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:27:20,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:27:20,218 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -403696930, now seen corresponding path program 1 times [2020-07-17 17:27:20,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:20,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304844761] [2020-07-17 17:27:20,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:20,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304844761] [2020-07-17 17:27:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:27:20,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 17:27:20,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399785461] [2020-07-17 17:27:20,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:27:20,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:20,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:27:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:27:20,361 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-07-17 17:27:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:20,527 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-07-17 17:27:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:27:20,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-07-17 17:27:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:20,530 INFO L225 Difference]: With dead ends: 58 [2020-07-17 17:27:20,530 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 17:27:20,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:27:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 17:27:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-17 17:27:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-17 17:27:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-17 17:27:20,547 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2020-07-17 17:27:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:20,548 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-17 17:27:20,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:27:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-17 17:27:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 17:27:20,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:20,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:27:20,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:27:20,550 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times [2020-07-17 17:27:20,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:20,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729908247] [2020-07-17 17:27:20,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:27:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:27:20,623 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:27:20,624 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:27:20,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:27:20,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:27:20 BoogieIcfgContainer [2020-07-17 17:27:20,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:27:20,667 INFO L168 Benchmark]: Toolchain (without parser) took 1856.21 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 102.8 MB in the beginning and 95.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,668 INFO L168 Benchmark]: CDTParser took 1.29 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.76 ms. Allocated memory is still 137.4 MB. Free memory was 102.3 MB in the beginning and 92.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,671 INFO L168 Benchmark]: Boogie Preprocessor took 125.86 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 179.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,672 INFO L168 Benchmark]: RCFGBuilder took 334.55 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 162.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,673 INFO L168 Benchmark]: TraceAbstraction took 1066.60 ms. Allocated memory is still 201.3 MB. Free memory was 162.4 MB in the beginning and 95.9 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:20,677 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.29 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.76 ms. Allocated memory is still 137.4 MB. Free memory was 102.3 MB in the beginning and 92.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.86 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 179.2 MB in the end (delta: -86.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 334.55 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 162.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1066.60 ms. Allocated memory is still 201.3 MB. Free memory was 162.4 MB in the beginning and 95.9 MB in the end (delta: 66.4 MB). Peak memory consumption was 66.4 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; VAL [d1={3:0}, d2={2:0}] [L14] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={3:0}, d2={2:0}, n=0] [L15] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L15] union dummy *pd = n ? &d1 : &d2; VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}, pd={2:0}] [L16] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L17] COND FALSE !(pd == &d1) VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L20] pd->b = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] EXPR d1.a VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] COND TRUE pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L28] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 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: 65 SDtfs, 87 SDslu, 98 SDs, 0 SdLazy, 111 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3008 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...