/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:30,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:30,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:30,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:30,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:30,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:30,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:30,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:30,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:30,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:30,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:30,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:30,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:30,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:30,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:30,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:30,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:30,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:30,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:30,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:30,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:30,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:30,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:30,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:30,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:21:30,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:30,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:30,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:30,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:21:30,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:30,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:30,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:30,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:30,540 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:30,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:30,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:30,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:30,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:30,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:30,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:30,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:30,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:30,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:30,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:30,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:30,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:30,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:30,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:30,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:30,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:30,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:30,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:30,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:30,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:21:30,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:30,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:30,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:30,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:30,866 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:30,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-21 11:21:30,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a817e0797/a6416c27e7194a0e90b335f90ce46d21/FLAG414d9201b [2020-07-21 11:21:31,344 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:31,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-21 11:21:31,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a817e0797/a6416c27e7194a0e90b335f90ce46d21/FLAG414d9201b [2020-07-21 11:21:31,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a817e0797/a6416c27e7194a0e90b335f90ce46d21 [2020-07-21 11:21:31,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:31,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:31,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:31,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:31,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:31,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:31" (1/1) ... [2020-07-21 11:21:31,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24dcfc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:31, skipping insertion in model container [2020-07-21 11:21:31,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:31" (1/1) ... [2020-07-21 11:21:31,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:31,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:21:31,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:31,966 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:21:31,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:32,005 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:21:32,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32 WrapperNode [2020-07-21 11:21:32,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:32,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:21:32,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:21:32,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:21:32,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (1/1) ... [2020-07-21 11:21:32,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:21:32,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:21:32,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:21:32,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:21:32,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (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 [2020-07-21 11:21:32,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:21:32,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:21:32,274 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-21 11:21:32,275 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 11:21:32,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:21:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:21:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-21 11:21:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:21:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:21:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:21:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 11:21:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:21:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:21:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:21:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:21:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:21:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:21:32,852 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:21:32,853 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:21:32,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:32 BoogieIcfgContainer [2020-07-21 11:21:32,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:21:32,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:21:32,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:21:32,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:21:32,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:31" (1/3) ... [2020-07-21 11:21:32,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d59da34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:32, skipping insertion in model container [2020-07-21 11:21:32,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:32" (2/3) ... [2020-07-21 11:21:32,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d59da34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:32, skipping insertion in model container [2020-07-21 11:21:32,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:32" (3/3) ... [2020-07-21 11:21:32,867 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-21 11:21:32,878 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:21:32,889 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:21:32,906 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:21:32,942 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:21:32,942 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:21:32,942 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:21:32,942 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:21:32,943 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:21:32,943 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:21:32,943 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:21:32,943 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:21:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 11:21:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:21:32,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:32,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:32,977 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1199829752, now seen corresponding path program 1 times [2020-07-21 11:21:32,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:32,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580263441] [2020-07-21 11:21:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:21:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:21:33,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:33,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580263441] [2020-07-21 11:21:33,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:33,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:21:33,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553761064] [2020-07-21 11:21:33,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:21:33,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:21:33,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:21:33,249 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 11:21:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:33,320 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-21 11:21:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:21:33,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 11:21:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:33,334 INFO L225 Difference]: With dead ends: 34 [2020-07-21 11:21:33,335 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 11:21:33,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:21:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 11:21:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 11:21:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 11:21:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-07-21 11:21:33,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2020-07-21 11:21:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:33,384 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-07-21 11:21:33,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:21:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-07-21 11:21:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:21:33,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:33,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:33,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:33,592 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2114164890, now seen corresponding path program 1 times [2020-07-21 11:21:33,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:33,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699171147] [2020-07-21 11:21:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:21:33,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:21:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:21:33,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:21:33,864 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:21:33,864 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:21:34,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:34,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:34 BoogieIcfgContainer [2020-07-21 11:21:34,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:34,117 INFO L168 Benchmark]: Toolchain (without parser) took 2372.37 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 103.6 MB in the beginning and 110.4 MB in the end (delta: -6.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,118 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.39 ms. Allocated memory is still 145.8 MB. Free memory was 103.1 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,120 INFO L168 Benchmark]: Boogie Preprocessor took 177.22 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.3 MB in the beginning and 182.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,121 INFO L168 Benchmark]: RCFGBuilder took 672.37 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 162.7 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,122 INFO L168 Benchmark]: TraceAbstraction took 1255.42 ms. Allocated memory is still 203.9 MB. Free memory was 162.1 MB in the beginning and 110.4 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:34,126 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 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.39 ms. Allocated memory is still 145.8 MB. Free memory was 103.1 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 177.22 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.3 MB in the beginning and 182.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 672.37 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 162.7 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1255.42 ms. Allocated memory is still 203.9 MB. Free memory was 162.1 MB in the beginning and 110.4 MB in the end (delta: 51.6 MB). Peak memory consumption was 51.6 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) VAL [\read(a)=4, a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={2:0}, p2={3:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L13] CALL g(p1, p2) VAL [p1={2:0}, p2={3:0}] [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 VAL [p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}, pq={5:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={2:0}, p1={2:0}, p2={3:0}, p2={3:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={4:0}, b={5:0}, f(a, &p1, &p2)=1, p1={2:0}, p2={3:0}] [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) VAL [\read(*p1)={5:0}, \read(*p1)=0, a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() VAL [a={4:0}, b={5:0}, p1={2:0}, p2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 53 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 299 SizeOfPredicates, 6 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 8 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...