/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/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:20,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:20,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:20,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:20,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:20,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:20,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:20,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:20,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:20,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:20,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:20,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:20,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:20,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:20,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:20,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:20,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:20,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:20,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:20,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:20,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:20,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:20,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:20,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:20,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:40:20,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:20,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:20,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:20,353 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 11:40:20,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:20,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:20,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:20,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:20,384 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:20,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:20,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:20,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:20,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:20,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:20,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:20,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:20,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:20,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:20,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:20,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:20,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:20,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:20,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:20,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:20,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:20,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:20,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:20,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:20,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:20,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:20,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:20,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:20,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:20,395 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 11:40:20,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:20,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:20,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:20,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:20,707 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:20,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-07-21 11:40:20,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80940bb1/2635a6421a2c4215ae0d9e00b3b9f628/FLAG9ed681e30 [2020-07-21 11:40:21,261 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:21,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-07-21 11:40:21,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80940bb1/2635a6421a2c4215ae0d9e00b3b9f628/FLAG9ed681e30 [2020-07-21 11:40:21,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c80940bb1/2635a6421a2c4215ae0d9e00b3b9f628 [2020-07-21 11:40:21,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:21,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:21,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:21,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:21,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:21,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:21,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbab4e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21, skipping insertion in model container [2020-07-21 11:40:21,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:21,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:21,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:40:21,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:21,865 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:40:21,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:21,902 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:40:21,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21 WrapperNode [2020-07-21 11:40:21,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:21,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:40:21,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:40:21,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:40:22,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (1/1) ... [2020-07-21 11:40:22,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:40:22,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:40:22,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:40:22,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:40:22,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (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 11:40:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:40:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:40:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:40:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-07-21 11:40:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:40:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:40:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:40:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-07-21 11:40:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:40:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:40:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:40:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:40:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:40:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:40:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:40:22,422 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:40:22,423 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:40:22,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:22 BoogieIcfgContainer [2020-07-21 11:40:22,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:40:22,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:40:22,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:40:22,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:40:22,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:21" (1/3) ... [2020-07-21 11:40:22,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4802dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:22, skipping insertion in model container [2020-07-21 11:40:22,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:21" (2/3) ... [2020-07-21 11:40:22,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4802dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:22, skipping insertion in model container [2020-07-21 11:40:22,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:22" (3/3) ... [2020-07-21 11:40:22,451 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-07-21 11:40:22,460 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:40:22,468 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:40:22,481 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:40:22,502 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:40:22,502 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:40:22,502 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:40:22,503 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:40:22,503 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:40:22,503 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:40:22,503 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:40:22,503 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:40:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 11:40:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:40:22,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:22,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:22,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1626450083, now seen corresponding path program 1 times [2020-07-21 11:40:22,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:22,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227731736] [2020-07-21 11:40:22,543 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 11:40:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:40:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:22,764 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:22,802 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 11:40:22,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:22,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227731736] [2020-07-21 11:40:22,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:22,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:40:22,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106912509] [2020-07-21 11:40:22,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:40:22,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:22,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:40:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:22,832 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-07-21 11:40:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:23,001 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-07-21 11:40:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:40:23,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-07-21 11:40:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:23,012 INFO L225 Difference]: With dead ends: 55 [2020-07-21 11:40:23,013 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 11:40:23,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:40:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 11:40:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-21 11:40:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 11:40:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-07-21 11:40:23,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 13 [2020-07-21 11:40:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:23,073 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-07-21 11:40:23,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:40:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-07-21 11:40:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:40:23,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:23,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:23,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:23,290 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -519824651, now seen corresponding path program 1 times [2020-07-21 11:40:23,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:23,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152595148] [2020-07-21 11:40:23,292 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 11:40:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 11:40:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:23,473 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:23,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:23,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:23,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:23,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:23,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:40:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:23,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152595148] [2020-07-21 11:40:23,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:23,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-07-21 11:40:23,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104486399] [2020-07-21 11:40:23,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:40:23,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:40:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:40:23,637 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2020-07-21 11:40:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:23,811 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-07-21 11:40:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:40:23,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-07-21 11:40:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:23,813 INFO L225 Difference]: With dead ends: 36 [2020-07-21 11:40:23,814 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 11:40:23,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 11:40:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 11:40:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-21 11:40:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:40:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-07-21 11:40:23,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 21 [2020-07-21 11:40:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:23,834 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-07-21 11:40:23,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:40:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-07-21 11:40:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:40:23,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:23,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:24,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:24,054 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2027370867, now seen corresponding path program 2 times [2020-07-21 11:40:24,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:24,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432084237] [2020-07-21 11:40:24,056 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 11:40:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:40:24,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:40:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:40:24,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:40:24,179 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:40:24,187 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:40:24,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:24,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:40:24 BoogieIcfgContainer [2020-07-21 11:40:24,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:40:24,452 INFO L168 Benchmark]: Toolchain (without parser) took 2816.70 ms. Allocated memory was 141.6 MB in the beginning and 235.9 MB in the end (delta: 94.4 MB). Free memory was 101.4 MB in the beginning and 179.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,453 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.44 ms. Allocated memory is still 141.6 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,455 INFO L168 Benchmark]: Boogie Preprocessor took 178.11 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,456 INFO L168 Benchmark]: RCFGBuilder took 344.61 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 167.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,457 INFO L168 Benchmark]: TraceAbstraction took 2020.48 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 166.6 MB in the beginning and 179.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:24,461 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.44 ms. Allocated memory is still 141.6 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 178.11 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.61 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 167.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2020.48 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 166.6 MB in the beginning and 179.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] Char *tmp; VAL [\old(tmp)=7, \old(tmp)=5, tmp={0:0}] [L29] Char pathbuf[1 +1]; [L31] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L33] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 VAL [\old(tmp)=0, \old(tmp)=0, bound={2:28}, pathbuf={2:0}, tmp={2:4}] [L35] CALL glob2 (pathbuf, bound) VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={2:0}, pathlim={2:28}, tmp={2:4}] [L16] Char *p; [L18] p = pathbuf VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 36 SDslu, 118 SDs, 0 SdLazy, 127 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 3936 SizeOfPredicates, 14 NumberOfNonLiveVariables, 213 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...