/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:39:27,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:27,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:27,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:27,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:27,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:27,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:27,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:27,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:27,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:27,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:27,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:27,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:27,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:27,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:27,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:27,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:27,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:27,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:27,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:27,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:27,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:27,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:27,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:27,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:39:27,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:39:27,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:39:27,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:39:27,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:39:27,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:39:27,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:27,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:27,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:27,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:27,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:27,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:27,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:27,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:27,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:27,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:27,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:27,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:39:27,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:27,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:27,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:27,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:27,165 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:27,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:27,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:27,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:27,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:27,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:27,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:27,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:27,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:27,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:27,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:27,167 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:27,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:27,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:27,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:27,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:27,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:27,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:27,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:27,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:27,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:27,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:27,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:27,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:27,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:27,170 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:27,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:27,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:27,525 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:27,527 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:27,528 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:27,528 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2020-08-21 16:39:27,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05e0a38e9/2fa68fc08baf4052a09d82834c6ee730/FLAGcd0ac8f04 [2020-08-21 16:39:28,053 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:28,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex01-1.c [2020-08-21 16:39:28,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05e0a38e9/2fa68fc08baf4052a09d82834c6ee730/FLAGcd0ac8f04 [2020-08-21 16:39:28,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05e0a38e9/2fa68fc08baf4052a09d82834c6ee730 [2020-08-21 16:39:28,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:28,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:28,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:28,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:28,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:28,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424943e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28, skipping insertion in model container [2020-08-21 16:39:28,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:28,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:28,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:28,715 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:28,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:28,749 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:28,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28 WrapperNode [2020-08-21 16:39:28,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:28,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:28,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:28,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:28,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... [2020-08-21 16:39:28,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:28,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:28,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:28,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:28,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:28,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:28,937 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 16:39:28,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:39:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:39:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 16:39:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:29,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:29,149 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 16:39:29,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:29 BoogieIcfgContainer [2020-08-21 16:39:29,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:29,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:29,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:29,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:28" (1/3) ... [2020-08-21 16:39:29,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4024d260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:29, skipping insertion in model container [2020-08-21 16:39:29,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:28" (2/3) ... [2020-08-21 16:39:29,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4024d260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:29, skipping insertion in model container [2020-08-21 16:39:29,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:29" (3/3) ... [2020-08-21 16:39:29,161 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2020-08-21 16:39:29,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:29,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:29,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:29,260 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:29,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:29,260 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:29,261 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:29,261 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:29,261 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:29,261 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:29,261 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 16:39:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:39:29,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:29,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:29,324 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -355556993, now seen corresponding path program 1 times [2020-08-21 16:39:29,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:29,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468480807] [2020-08-21 16:39:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:29,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468480807] [2020-08-21 16:39:29,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:29,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 16:39:29,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914852469] [2020-08-21 16:39:29,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 16:39:29,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:29,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 16:39:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:29,497 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-08-21 16:39:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:29,523 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-08-21 16:39:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 16:39:29,525 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-21 16:39:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:29,537 INFO L225 Difference]: With dead ends: 45 [2020-08-21 16:39:29,537 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 16:39:29,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 16:39:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 16:39:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 16:39:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-21 16:39:29,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-08-21 16:39:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:29,587 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-21 16:39:29,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 16:39:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-21 16:39:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 16:39:29,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:29,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:29,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:29,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash -359251077, now seen corresponding path program 1 times [2020-08-21 16:39:29,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:29,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279836778] [2020-08-21 16:39:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:39:29,621 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:39:29,621 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:29,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:29,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:29 BoogieIcfgContainer [2020-08-21 16:39:29,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:29,649 INFO L168 Benchmark]: Toolchain (without parser) took 1150.15 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 102.3 MB in the beginning and 143.4 MB in the end (delta: -41.1 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:29,650 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 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. [2020-08-21 16:39:29,651 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.70 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:29,653 INFO L168 Benchmark]: Boogie Preprocessor took 110.61 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 179.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:29,654 INFO L168 Benchmark]: RCFGBuilder took 291.41 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 165.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:29,655 INFO L168 Benchmark]: TraceAbstraction took 491.30 ms. Allocated memory is still 201.3 MB. Free memory was 165.0 MB in the beginning and 143.4 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:29,659 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 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 251.70 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.61 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 179.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.41 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 165.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 491.30 ms. Allocated memory is still 201.3 MB. Free memory was 165.0 MB in the beginning and 143.4 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 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: [L34] _Bool c = __VERIFIER_nondet_bool(); [L35] COND FALSE !(\read(c)) [L38] CALL f(2) [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L14] COND FALSE !(!(k <= 1073741823)) [L17] COND FALSE !(z < k) [L18] CALL __VERIFIER_assert(z>=2) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...