/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:50:45,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:50:45,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:50:45,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:50:45,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:50:45,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:50:45,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:50:45,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:50:45,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:50:45,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:50:45,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:50:45,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:50:45,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:50:45,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:50:45,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:50:45,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:50:45,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:50:45,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:50:45,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:50:45,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:50:45,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:50:45,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:50:45,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:50:45,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:50:45,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:50:45,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:50:45,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:50:45,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:50:45,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:50:45,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:50:45,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:50:45,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:50:45,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:50:45,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:50:45,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:50:45,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:50:45,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:50:45,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:50:45,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:50:45,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:50:45,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:50:45,281 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 [2020-08-18 22:50:45,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:50:45,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:50:45,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:50:45,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:50:45,324 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:50:45,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:50:45,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:50:45,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:50:45,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:50:45,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:50:45,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:50:45,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:50:45,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:50:45,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:50:45,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:50:45,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:50:45,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:50:45,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:50:45,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:50:45,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:50:45,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:50:45,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:50:45,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:50:45,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:50:45,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:50:45,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:50:45,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:50:45,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:50:45,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:50:45,331 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=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:50:45,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:50:45,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:50:45,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:50:45,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:50:45,652 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:50:45,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2020-08-18 22:50:45,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02cd65e79/cb79e7a3cea348d3a130abc49ab72fbd/FLAGd84eb9e21 [2020-08-18 22:50:46,120 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:50:46,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex01-2.i [2020-08-18 22:50:46,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02cd65e79/cb79e7a3cea348d3a130abc49ab72fbd/FLAGd84eb9e21 [2020-08-18 22:50:46,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02cd65e79/cb79e7a3cea348d3a130abc49ab72fbd [2020-08-18 22:50:46,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:50:46,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:50:46,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:50:46,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:50:46,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:50:46,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656a7a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46, skipping insertion in model container [2020-08-18 22:50:46,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:50:46,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:50:46,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:50:46,780 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:50:46,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:50:46,813 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:50:46,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46 WrapperNode [2020-08-18 22:50:46,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:50:46,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:50:46,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:50:46,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:50:46,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (1/1) ... [2020-08-18 22:50:46,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:50:46,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:50:46,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:50:46,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:50:46,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (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 [2020-08-18 22:50:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:50:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:50:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:50:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:50:46,985 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-18 22:50:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 22:50:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:50:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-18 22:50:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:50:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:50:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:50:47,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:50:47,226 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:50:47,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:50:47 BoogieIcfgContainer [2020-08-18 22:50:47,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:50:47,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:50:47,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:50:47,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:50:47,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:50:46" (1/3) ... [2020-08-18 22:50:47,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75321e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:50:47, skipping insertion in model container [2020-08-18 22:50:47,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:50:46" (2/3) ... [2020-08-18 22:50:47,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75321e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:50:47, skipping insertion in model container [2020-08-18 22:50:47,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:50:47" (3/3) ... [2020-08-18 22:50:47,238 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-2.i [2020-08-18 22:50:47,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:50:47,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:50:47,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:50:47,312 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:50:47,312 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:50:47,312 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:50:47,313 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:50:47,313 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:50:47,313 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:50:47,313 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:50:47,313 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:50:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-08-18 22:50:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 22:50:47,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:47,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:47,351 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash -409844558, now seen corresponding path program 1 times [2020-08-18 22:50:47,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:47,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962738719] [2020-08-18 22:50:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:47,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962738719] [2020-08-18 22:50:47,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:47,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 22:50:47,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580793891] [2020-08-18 22:50:47,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 22:50:47,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:47,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 22:50:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:50:47,578 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-08-18 22:50:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:47,603 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-08-18 22:50:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 22:50:47,605 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-18 22:50:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:47,615 INFO L225 Difference]: With dead ends: 51 [2020-08-18 22:50:47,616 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 22:50:47,620 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 [2020-08-18 22:50:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 22:50:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 22:50:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 22:50:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-18 22:50:47,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-08-18 22:50:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:47,661 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-18 22:50:47,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 22:50:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-18 22:50:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 22:50:47,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:47,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:47,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:50:47,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -413538642, now seen corresponding path program 1 times [2020-08-18 22:50:47,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:47,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923059521] [2020-08-18 22:50:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:47,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:47,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923059521] [2020-08-18 22:50:47,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:47,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:50:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593903123] [2020-08-18 22:50:47,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:50:47,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:50:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:47,777 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-08-18 22:50:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:47,820 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-08-18 22:50:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:50:47,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 22:50:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:47,822 INFO L225 Difference]: With dead ends: 16 [2020-08-18 22:50:47,822 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:50:47,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:50:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:50:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:50:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:50:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:50:47,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-18 22:50:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:47,826 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:50:47,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:50:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:50:47,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:50:47,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:50:47,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:50:47,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:50:47,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:50:47,891 INFO L268 CegarLoopResult]: For program point L27(lines 27 34) no Hoare annotation was computed. [2020-08-18 22:50:47,891 INFO L271 CegarLoopResult]: At program point L27-2(lines 25 35) the Hoare annotation is: true [2020-08-18 22:50:47,891 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-08-18 22:50:47,891 INFO L268 CegarLoopResult]: For program point L25-2(lines 14 36) no Hoare annotation was computed. [2020-08-18 22:50:47,892 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-08-18 22:50:47,892 INFO L264 CegarLoopResult]: At program point L19-3(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-08-18 22:50:47,892 INFO L268 CegarLoopResult]: For program point fEXIT(lines 14 36) no Hoare annotation was computed. [2020-08-18 22:50:47,892 INFO L271 CegarLoopResult]: At program point fENTRY(lines 14 36) the Hoare annotation is: true [2020-08-18 22:50:47,892 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-08-18 22:50:47,893 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-08-18 22:50:47,893 INFO L268 CegarLoopResult]: For program point L20(lines 14 36) no Hoare annotation was computed. [2020-08-18 22:50:47,893 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-18 22:50:47,893 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:50:47,893 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:50:47,894 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:50:47,894 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:50:47,894 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:50:47,894 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 22:50:47,894 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:50:47,894 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:50:47,895 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 45) the Hoare annotation is: true [2020-08-18 22:50:47,895 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 45) no Hoare annotation was computed. [2020-08-18 22:50:47,895 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-08-18 22:50:47,895 INFO L268 CegarLoopResult]: For program point L42-1(lines 39 43) no Hoare annotation was computed. [2020-08-18 22:50:47,895 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 45) no Hoare annotation was computed. [2020-08-18 22:50:47,895 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-08-18 22:50:47,896 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:50:47,896 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 22:50:47,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:50:47 BoogieIcfgContainer [2020-08-18 22:50:47,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:50:47,913 INFO L168 Benchmark]: Toolchain (without parser) took 1354.97 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 104.0 MB in the beginning and 131.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:47,914 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:50:47,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:47,917 INFO L168 Benchmark]: Boogie Preprocessor took 110.93 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.0 MB in the beginning and 180.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:47,917 INFO L168 Benchmark]: RCFGBuilder took 303.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:47,918 INFO L168 Benchmark]: TraceAbstraction took 679.99 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 131.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:47,923 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.93 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.0 MB in the beginning and 180.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.76 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 166.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 679.99 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 131.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 <= z - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 1 SDslu, 33 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 20 NumberOfFragments, 15 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...