/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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:19:12,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:19:12,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:19:13,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:19:13,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:19:13,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:19:13,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:19:13,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:19:13,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:19:13,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:19:13,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:19:13,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:19:13,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:19:13,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:19:13,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:19:13,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:19:13,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:19:13,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:19:13,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:19:13,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:19:13,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:19:13,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:19:13,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:19:13,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:19:13,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:19:13,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:19:13,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:19:13,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:19:13,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:19:13,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:19:13,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:19:13,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:19:13,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:19:13,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:19:13,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:19:13,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:19:13,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:19:13,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:19:13,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:19:13,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:19:13,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:19:13,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:19:13,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:19:13,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:19:13,129 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:19:13,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:19:13,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:19:13,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:13,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:19:13,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:19:13,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:19:13,131 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 [2020-08-22 22:19:13,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:19:13,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:19:13,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:19:13,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:19:13,446 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:19:13,446 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-08-22 22:19:13,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7026d4158/e4eac2650c854fb4bfe49f04ce764f4f/FLAG39882a3ea [2020-08-22 22:19:14,034 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:19:14,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-08-22 22:19:14,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7026d4158/e4eac2650c854fb4bfe49f04ce764f4f/FLAG39882a3ea [2020-08-22 22:19:14,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7026d4158/e4eac2650c854fb4bfe49f04ce764f4f [2020-08-22 22:19:14,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:19:14,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:19:14,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:14,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:19:14,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:19:14,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1083df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14, skipping insertion in model container [2020-08-22 22:19:14,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:19:14,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:19:14,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:14,670 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:19:14,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:14,708 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:19:14,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14 WrapperNode [2020-08-22 22:19:14,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:14,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:19:14,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:19:14,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:19:14,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (1/1) ... [2020-08-22 22:19:14,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:19:14,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:19:14,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:19:14,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:19:14,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (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 [2020-08-22 22:19:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:19:14,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:19:14,910 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-08-22 22:19:14,910 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-22 22:19:14,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:19:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:19:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-08-22 22:19:14,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:19:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:19:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:19:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-22 22:19:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:19:14,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:19:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:19:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:19:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:19:14,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:19:15,337 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:19:15,337 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:19:15,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:15 BoogieIcfgContainer [2020-08-22 22:19:15,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:19:15,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:19:15,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:19:15,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:19:15,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:19:14" (1/3) ... [2020-08-22 22:19:15,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d31611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:15, skipping insertion in model container [2020-08-22 22:19:15,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:14" (2/3) ... [2020-08-22 22:19:15,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d31611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:15, skipping insertion in model container [2020-08-22 22:19:15,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:15" (3/3) ... [2020-08-22 22:19:15,355 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-08-22 22:19:15,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:19:15,381 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:19:15,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:19:15,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:19:15,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:19:15,426 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:19:15,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:19:15,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:19:15,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:19:15,427 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:19:15,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:19:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-08-22 22:19:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 22:19:15,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:15,458 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] [2020-08-22 22:19:15,459 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:15,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1600319067, now seen corresponding path program 1 times [2020-08-22 22:19:15,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:15,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162560651] [2020-08-22 22:19:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:15,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 22:19:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:19:16,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162560651] [2020-08-22 22:19:16,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:16,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 22:19:16,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737793817] [2020-08-22 22:19:16,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:19:16,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:19:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:19:16,082 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 11 states. [2020-08-22 22:19:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:16,761 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-08-22 22:19:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:19:16,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-08-22 22:19:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:16,775 INFO L225 Difference]: With dead ends: 105 [2020-08-22 22:19:16,776 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 22:19:16,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:19:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 22:19:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 22:19:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 22:19:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 51 transitions. [2020-08-22 22:19:16,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 51 transitions. Word has length 39 [2020-08-22 22:19:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:16,840 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 51 transitions. [2020-08-22 22:19:16,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:19:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 51 transitions. [2020-08-22 22:19:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:19:16,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:16,842 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] [2020-08-22 22:19:16,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:19:16,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2059010026, now seen corresponding path program 1 times [2020-08-22 22:19:16,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:16,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807361484] [2020-08-22 22:19:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:16,975 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:17,084 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:17,138 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:19:17,138 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:19:17,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:19:17,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:19:17 BoogieIcfgContainer [2020-08-22 22:19:17,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:19:17,201 INFO L168 Benchmark]: Toolchain (without parser) took 2798.26 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 102.0 MB in the beginning and 161.1 MB in the end (delta: -59.1 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,202 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,204 INFO L168 Benchmark]: Boogie Preprocessor took 123.64 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 181.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,205 INFO L168 Benchmark]: RCFGBuilder took 509.93 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 159.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,207 INFO L168 Benchmark]: TraceAbstraction took 1852.73 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 158.4 MB in the beginning and 161.1 MB in the end (delta: -2.7 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:17,212 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.8 MB in the beginning and 91.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.64 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 181.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 509.93 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 159.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1852.73 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 158.4 MB in the beginning and 161.1 MB in the end (delta: -2.7 MB). Peak memory consumption was 29.3 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; VAL [a={3:0}, b={6:0}] [L22] int *p1, *p2; VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L24] p1 = &a VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L25] p2 = &b VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L27] b = 1 VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L28] a = 5 VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L30] EXPR \read(a) VAL [\read(a)=5, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L30] a-- VAL [\read(a)=5, a={3:0}, a--=5, b={6:0}, p1={7:0}, p2={2:0}] [L32] EXPR \read(a) VAL [\read(a)=4, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={7:0}, p2={2:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L13] CALL g(p1, p2) VAL [p1={7:0}, p2={2:0}] [L5] EXPR \read(**p2) VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L5] int *pq = *p2; VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L7] EXPR \read(**p2) VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L7] *p1 = *p2 VAL [\read(**p2)={6:0}, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L8] *pq = 0 VAL [p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}, pq={6:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={7:0}, p1={7:0}, p2={2:0}, p2={2:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={3:0}, b={6:0}, f(a, &p1, &p2)=1, p1={7:0}, p2={2:0}] [L32] a = f(a, &p1, &p2) VAL [\read(a)=4, a={3:0}, b={6:0}, f(a, &p1, &p2)=1, p1={7:0}, p2={2:0}] [L34] EXPR \read(*p1) VAL [\read(*p1)={6:0}, \read(*p1)=0, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L34] COND TRUE *p1 == 0 VAL [\read(*p1)={6:0}, \read(*p1)=0, a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] [L40] __VERIFIER_error() VAL [a={3:0}, b={6:0}, p1={7:0}, p2={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 3838 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...