/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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:24:07,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:24:07,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:24:07,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:24:07,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:24:07,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:24:07,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:24:07,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:24:07,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:24:07,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:24:07,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:24:07,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:24:07,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:24:07,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:24:07,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:24:07,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:24:07,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:24:07,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:24:07,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:24:07,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:24:07,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:24:07,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:24:07,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:24:07,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:24:07,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:24:07,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:24:07,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:24:07,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:24:07,426 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 13:24:07,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:24:07,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:24:07,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:24:07,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:24:07,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:24:07,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:24:07,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:24:07,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:24:07,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:24:07,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:24:07,461 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:24:07,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:24:07,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:24:07,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:07,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:24:07,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:24:07,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:24:07,463 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:24:07,748 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:24:07,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:24:07,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:24:07,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:24:07,768 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:24:07,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-07 13:24:07,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71575f324/dbd01332b90b427db9d851812893a3b0/FLAGd9b2df8b2 [2020-07-07 13:24:08,269 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:24:08,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-07 13:24:08,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71575f324/dbd01332b90b427db9d851812893a3b0/FLAGd9b2df8b2 [2020-07-07 13:24:08,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71575f324/dbd01332b90b427db9d851812893a3b0 [2020-07-07 13:24:08,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:24:08,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:24:08,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:08,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:24:08,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:24:08,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:08,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4b5cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08, skipping insertion in model container [2020-07-07 13:24:08,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:08,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:24:08,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:24:08,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:08,917 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:24:08,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:08,955 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:24:08,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08 WrapperNode [2020-07-07 13:24:08,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:08,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:24:08,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:24:08,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:24:09,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (1/1) ... [2020-07-07 13:24:09,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:24:09,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:24:09,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:24:09,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:24:09,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (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 13:24:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:24:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:24:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-07 13:24:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-07 13:24:09,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:24:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:24:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-07 13:24:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 13:24:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 13:24:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:24:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-07 13:24:09,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:24:09,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:24:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:24:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:24:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:24:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:24:09,652 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:24:09,652 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:24:09,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:09 BoogieIcfgContainer [2020-07-07 13:24:09,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:24:09,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:24:09,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:24:09,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:24:09,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:24:08" (1/3) ... [2020-07-07 13:24:09,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e022dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:09, skipping insertion in model container [2020-07-07 13:24:09,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:08" (2/3) ... [2020-07-07 13:24:09,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e022dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:09, skipping insertion in model container [2020-07-07 13:24:09,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:09" (3/3) ... [2020-07-07 13:24:09,665 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-07 13:24:09,677 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:24:09,685 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:24:09,698 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:24:09,718 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:24:09,718 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:24:09,718 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:24:09,719 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:24:09,719 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:24:09,719 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:24:09,719 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:24:09,719 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:24:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-07-07 13:24:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 13:24:09,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:09,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:09,750 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1600319067, now seen corresponding path program 1 times [2020-07-07 13:24:09,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:09,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351094223] [2020-07-07 13:24:09,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:10,240 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 13:24:10,240 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:10,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351094223] [2020-07-07 13:24:10,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:10,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:24:10,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519500117] [2020-07-07 13:24:10,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:24:10,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:10,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:24:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:24:10,271 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 11 states. [2020-07-07 13:24:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:10,994 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-07-07 13:24:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:24:10,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-07 13:24:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:11,006 INFO L225 Difference]: With dead ends: 105 [2020-07-07 13:24:11,007 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 13:24:11,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:24:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 13:24:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 13:24:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 13:24:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 51 transitions. [2020-07-07 13:24:11,058 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 51 transitions. Word has length 39 [2020-07-07 13:24:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:11,059 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 51 transitions. [2020-07-07 13:24:11,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:24:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 51 transitions. [2020-07-07 13:24:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 13:24:11,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:11,061 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, 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 13:24:11,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:24:11,062 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:11,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2059010026, now seen corresponding path program 1 times [2020-07-07 13:24:11,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:11,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479189191] [2020-07-07 13:24:11,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:11,283 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:11,283 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:24:11,283 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:24:11,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:24:11,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:24:11 BoogieIcfgContainer [2020-07-07 13:24:11,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:24:11,307 INFO L168 Benchmark]: Toolchain (without parser) took 2620.78 ms. Allocated memory was 145.8 MB in the beginning and 233.8 MB in the end (delta: 88.1 MB). Free memory was 104.1 MB in the beginning and 157.4 MB in the end (delta: -53.3 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,308 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.76 ms. Allocated memory is still 145.8 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,310 INFO L168 Benchmark]: Boogie Preprocessor took 153.22 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 93.8 MB in the beginning and 183.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,311 INFO L168 Benchmark]: RCFGBuilder took 547.48 ms. Allocated memory is still 205.0 MB. Free memory was 183.0 MB in the beginning and 159.8 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,312 INFO L168 Benchmark]: TraceAbstraction took 1646.37 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 159.8 MB in the beginning and 157.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 31.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:11,316 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.76 ms. Allocated memory is still 145.8 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.22 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 93.8 MB in the beginning and 183.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 547.48 ms. Allocated memory is still 205.0 MB. Free memory was 183.0 MB in the beginning and 159.8 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1646.37 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 159.8 MB in the beginning and 157.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 31.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) [L32] CALL, EXPR f(a, &p1, &p2) [L12] COND TRUE a == 4 [L13] CALL g(p1, p2) [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 [L13] RET g(p1, p2) [L14] return 1; [L32] RET, EXPR f(a, &p1, &p2) [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 52 SDslu, 262 SDs, 0 SdLazy, 287 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...