/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:24:38,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:24:38,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:24:38,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:24:38,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:24:38,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:24:38,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:24:38,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:24:38,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:24:38,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:24:38,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:24:38,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:24:38,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:24:38,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:24:38,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:24:38,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:24:38,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:24:38,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:24:38,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:24:38,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:24:38,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:24:38,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:24:38,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:24:38,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:24:38,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:24:38,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:24:38,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:24:38,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:24:38,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:24:38,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:24:38,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:24:38,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:24:38,383 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:24:38,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:24:38,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:24:38,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:24:38,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:24:38,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:24:38,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:24:38,386 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:24:38,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:24:38,386 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:24:38,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:24:38,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:24:38,387 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:24:38,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:24:38,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:24:38,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:38,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:24:38,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:24:38,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:24:38,389 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:24:38,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:24:38,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:24:38,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:24:38,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:24:38,673 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:24:38,674 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-07 13:24:38,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50557e03c/3cfe90b0722c42338125b22316301ac2/FLAGff86046c7 [2020-07-07 13:24:39,169 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:24:39,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-07 13:24:39,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50557e03c/3cfe90b0722c42338125b22316301ac2/FLAGff86046c7 [2020-07-07 13:24:39,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50557e03c/3cfe90b0722c42338125b22316301ac2 [2020-07-07 13:24:39,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:24:39,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:24:39,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:39,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:24:39,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:24:39,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd0754d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39, skipping insertion in model container [2020-07-07 13:24:39,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:24:39,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:24:39,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:39,414 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:24:39,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:39,448 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:24:39,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39 WrapperNode [2020-07-07 13:24:39,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:39,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:24:39,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:24:39,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:24:39,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (1/1) ... [2020-07-07 13:24:39,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:24:39,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:24:39,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:24:39,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:24:39,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (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 [2020-07-07 13:24:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:24:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:24:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:24:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:24:40,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:24:40,050 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:24:40,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:40 BoogieIcfgContainer [2020-07-07 13:24:40,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:24:40,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:24:40,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:24:40,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:24:40,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:24:39" (1/3) ... [2020-07-07 13:24:40,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3148ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:40, skipping insertion in model container [2020-07-07 13:24:40,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:39" (2/3) ... [2020-07-07 13:24:40,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b3148ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:40, skipping insertion in model container [2020-07-07 13:24:40,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:40" (3/3) ... [2020-07-07 13:24:40,063 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-07-07 13:24:40,072 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:24:40,079 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:24:40,093 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:24:40,116 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:24:40,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:24:40,116 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:24:40,116 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:24:40,116 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:24:40,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:24:40,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:24:40,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:24:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-07-07 13:24:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:24:40,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:40,147 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] [2020-07-07 13:24:40,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times [2020-07-07 13:24:40,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:40,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993099092] [2020-07-07 13:24:40,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:40,428 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:40,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993099092] [2020-07-07 13:24:40,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:40,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:24:40,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419331866] [2020-07-07 13:24:40,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:24:40,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:24:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:24:40,451 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-07-07 13:24:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:40,593 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-07-07 13:24:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:24:40,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-07 13:24:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:40,606 INFO L225 Difference]: With dead ends: 57 [2020-07-07 13:24:40,606 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 13:24:40,610 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 [2020-07-07 13:24:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 13:24:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-07 13:24:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 13:24:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-07-07 13:24:40,656 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-07-07 13:24:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:40,657 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-07-07 13:24:40,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:24:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-07-07 13:24:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 13:24:40,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:40,659 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] [2020-07-07 13:24:40,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:24:40,660 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash -403696930, now seen corresponding path program 1 times [2020-07-07 13:24:40,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:40,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331930846] [2020-07-07 13:24:40,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:40,810 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331930846] [2020-07-07 13:24:40,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:40,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:24:40,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850437678] [2020-07-07 13:24:40,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:24:40,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:24:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:24:40,816 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-07-07 13:24:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:41,044 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-07-07 13:24:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:24:41,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-07-07 13:24:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:41,049 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:24:41,049 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 13:24:41,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:24:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 13:24:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-07 13:24:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 13:24:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-07 13:24:41,082 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2020-07-07 13:24:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:41,083 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-07 13:24:41,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:24:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-07 13:24:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 13:24:41,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:41,085 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] [2020-07-07 13:24:41,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:24:41,088 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times [2020-07-07 13:24:41,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:41,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114663550] [2020-07-07 13:24:41,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:41,185 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:41,187 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:24:41,188 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:24:41,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:24:41,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:24:41 BoogieIcfgContainer [2020-07-07 13:24:41,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:24:41,210 INFO L168 Benchmark]: Toolchain (without parser) took 2008.62 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 102.6 MB in the beginning and 98.0 MB in the end (delta: 4.6 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:41,210 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory is still 120.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:24:41,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.17 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:41,212 INFO L168 Benchmark]: Boogie Preprocessor took 143.46 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 92.5 MB in the beginning and 182.8 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:41,213 INFO L168 Benchmark]: RCFGBuilder took 460.54 ms. Allocated memory is still 204.5 MB. Free memory was 182.8 MB in the beginning and 165.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:41,214 INFO L168 Benchmark]: TraceAbstraction took 1151.62 ms. Allocated memory is still 204.5 MB. Free memory was 164.9 MB in the beginning and 98.0 MB in the end (delta: 66.9 MB). Peak memory consumption was 66.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:41,218 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory is still 120.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.17 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.46 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 92.5 MB in the beginning and 182.8 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 460.54 ms. Allocated memory is still 204.5 MB. Free memory was 182.8 MB in the beginning and 165.9 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1151.62 ms. Allocated memory is still 204.5 MB. Free memory was 164.9 MB in the beginning and 98.0 MB in the end (delta: 66.9 MB). Peak memory consumption was 66.9 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, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 86 SDslu, 85 SDs, 0 SdLazy, 109 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, 4 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: No data available, 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...