/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/array-fpi/brs5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:37:22,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:37:22,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:37:22,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:37:22,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:37:22,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:37:22,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:37:22,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:37:22,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:37:22,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:37:22,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:37:22,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:37:22,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:37:22,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:37:22,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:37:22,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:37:22,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:37:22,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:37:22,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:37:22,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:37:22,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:37:22,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:37:22,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:37:22,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:37:22,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:37:22,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:37:22,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:37:22,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:37:22,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:37:22,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:37:22,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:37:22,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:37:22,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:37:22,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:37:22,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:37:22,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:37:22,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:37:22,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:37:22,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:37:22,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:37:22,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:37:22,109 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 11:37:22,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:37:22,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:37:22,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:37:22,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:37:22,125 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:37:22,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:37:22,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:37:22,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:37:22,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:37:22,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:37:22,127 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:37:22,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:37:22,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:37:22,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:37:22,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:37:22,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:37:22,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:37:22,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:37:22,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:37:22,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:37:22,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:37:22,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:22,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:37:22,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:37:22,130 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 11:37:22,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:37:22,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:37:22,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:37:22,469 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:37:22,470 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:37:22,471 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs5f.c [2020-07-21 11:37:22,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19036040/25bebc19acf740deb04c8beb54916842/FLAG6a84f3a3d [2020-07-21 11:37:22,974 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:37:22,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs5f.c [2020-07-21 11:37:22,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19036040/25bebc19acf740deb04c8beb54916842/FLAG6a84f3a3d [2020-07-21 11:37:23,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19036040/25bebc19acf740deb04c8beb54916842 [2020-07-21 11:37:23,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:37:23,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:37:23,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:23,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:37:23,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:37:23,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65136dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23, skipping insertion in model container [2020-07-21 11:37:23,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:37:23,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:37:23,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:23,611 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:37:23,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:23,654 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:37:23,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23 WrapperNode [2020-07-21 11:37:23,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:23,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:37:23,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:37:23,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:37:23,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (1/1) ... [2020-07-21 11:37:23,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:37:23,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:37:23,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:37:23,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:37:23,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (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 11:37:23,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:37:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:37:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:37:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:37:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:37:23,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:37:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:37:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:37:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:37:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:37:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:37:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:37:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:37:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:37:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:37:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:37:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:37:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:37:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:37:24,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:37:24,195 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:37:24,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:24 BoogieIcfgContainer [2020-07-21 11:37:24,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:37:24,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:37:24,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:37:24,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:37:24,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:37:23" (1/3) ... [2020-07-21 11:37:24,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be76072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:24, skipping insertion in model container [2020-07-21 11:37:24,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:23" (2/3) ... [2020-07-21 11:37:24,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be76072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:24, skipping insertion in model container [2020-07-21 11:37:24,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:24" (3/3) ... [2020-07-21 11:37:24,209 INFO L109 eAbstractionObserver]: Analyzing ICFG brs5f.c [2020-07-21 11:37:24,220 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:37:24,227 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:37:24,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:37:24,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:37:24,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:37:24,278 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:37:24,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:37:24,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:37:24,279 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:37:24,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:37:24,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:37:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 11:37:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:37:24,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:24,320 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] [2020-07-21 11:37:24,323 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 11:37:24,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:24,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674426120] [2020-07-21 11:37:24,358 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 11:37:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:37:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:24,521 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 11:37:24,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:24,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674426120] [2020-07-21 11:37:24,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:24,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:37:24,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481017315] [2020-07-21 11:37:24,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:37:24,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:24,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:37:24,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:37:24,550 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-21 11:37:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:24,577 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-21 11:37:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:37:24,578 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 11:37:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:24,587 INFO L225 Difference]: With dead ends: 56 [2020-07-21 11:37:24,590 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 11:37:24,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:37:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 11:37:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 11:37:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 11:37:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-21 11:37:24,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-21 11:37:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:24,635 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-21 11:37:24,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:37:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-21 11:37:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:37:24,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:24,637 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] [2020-07-21 11:37:24,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:24,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-21 11:37:24,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:24,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892248757] [2020-07-21 11:37:24,854 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 11:37:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:24,970 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 11:37:24,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:24,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892248757] [2020-07-21 11:37:24,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:24,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:37:24,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163944736] [2020-07-21 11:37:24,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:37:24,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:37:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:24,974 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-07-21 11:37:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:25,050 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-21 11:37:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:37:25,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 11:37:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:25,053 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:37:25,053 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 11:37:25,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 11:37:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 11:37:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 11:37:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 11:37:25,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-21 11:37:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:25,063 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 11:37:25,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:37:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 11:37:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:37:25,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:25,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:25,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,281 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:25,283 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 11:37:25,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:25,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681418098] [2020-07-21 11:37:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:25,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:25,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:25,436 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:37:25,437 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:37:25,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:25,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:37:25 BoogieIcfgContainer [2020-07-21 11:37:25,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:37:25,692 INFO L168 Benchmark]: Toolchain (without parser) took 2301.09 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.6 MB in the beginning and 104.9 MB in the end (delta: -1.3 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,693 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.75 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,695 INFO L168 Benchmark]: Boogie Preprocessor took 145.54 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 179.1 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,696 INFO L168 Benchmark]: RCFGBuilder took 398.06 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,697 INFO L168 Benchmark]: TraceAbstraction took 1487.82 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:25,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.75 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.54 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 179.1 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.06 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1487.82 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i