/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/veris.c_sendmail_tTflag_arr_one_loop.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:36,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:36,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:36,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:36,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:36,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:36,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:36,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:36,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:36,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:36,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:36,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:36,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:36,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:36,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:36,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:36,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:36,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:36,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:36,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:36,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:36,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:36,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:36,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:36,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:48:36,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:36,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:36,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:36,330 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 [2020-07-20 11:48:36,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:36,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:36,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:36,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:36,349 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:36,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:36,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:36,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:36,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:36,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:36,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:36,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:36,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:36,351 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:36,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:36,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:36,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:36,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:36,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:36,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:36,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:36,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:36,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:36,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:36,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:36,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:36,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:36,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:36,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:36,355 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 [2020-07-20 11:48:36,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:36,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:36,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:36,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:36,704 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:36,705 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_sendmail_tTflag_arr_one_loop.c [2020-07-20 11:48:36,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cc936f8/f47a2fe4e4864a4f8718406a6800e3e1/FLAG37f47fa2c [2020-07-20 11:48:37,472 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:37,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_sendmail_tTflag_arr_one_loop.c [2020-07-20 11:48:37,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cc936f8/f47a2fe4e4864a4f8718406a6800e3e1/FLAG37f47fa2c [2020-07-20 11:48:37,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cc936f8/f47a2fe4e4864a4f8718406a6800e3e1 [2020-07-20 11:48:37,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:37,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:37,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:37,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:37,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:37,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:37" (1/1) ... [2020-07-20 11:48:37,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:37, skipping insertion in model container [2020-07-20 11:48:37,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:37" (1/1) ... [2020-07-20 11:48:37,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:37,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:38,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:38,084 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:38,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:38,139 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:38,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38 WrapperNode [2020-07-20 11:48:38,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:38,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:38,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:38,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:38,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (1/1) ... [2020-07-20 11:48:38,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:38,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:38,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:38,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:38,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (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 [2020-07-20 11:48:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:38,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 11:48:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:38,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:38,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:38,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:38,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:38,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:38,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:38,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:38,732 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:38,732 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:48:38,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:38 BoogieIcfgContainer [2020-07-20 11:48:38,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:38,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:38,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:38,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:38,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:37" (1/3) ... [2020-07-20 11:48:38,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eb76e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:38, skipping insertion in model container [2020-07-20 11:48:38,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:38" (2/3) ... [2020-07-20 11:48:38,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72eb76e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:38, skipping insertion in model container [2020-07-20 11:48:38,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:38" (3/3) ... [2020-07-20 11:48:38,751 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_sendmail_tTflag_arr_one_loop.c [2020-07-20 11:48:38,765 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:38,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:38,796 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:38,823 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:38,823 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:38,823 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:38,823 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:38,824 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:38,824 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:38,824 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:38,824 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 11:48:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:48:38,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:38,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:38,852 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:38,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547275, now seen corresponding path program 1 times [2020-07-20 11:48:38,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:38,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673630162] [2020-07-20 11:48:38,868 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 [2020-07-20 11:48:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:38,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:38,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673630162] [2020-07-20 11:48:38,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:38,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:38,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882869256] [2020-07-20 11:48:38,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:38,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:39,014 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-20 11:48:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:39,044 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-20 11:48:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:39,046 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-20 11:48:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:39,057 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:48:39,057 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 11:48:39,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 11:48:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 11:48:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:48:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 11:48:39,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-20 11:48:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:39,114 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 11:48:39,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 11:48:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:48:39,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:39,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:39,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:39,333 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1742365231, now seen corresponding path program 1 times [2020-07-20 11:48:39,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:39,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077267618] [2020-07-20 11:48:39,336 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 [2020-07-20 11:48:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:39,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:48:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:39,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:39,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077267618] [2020-07-20 11:48:39,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:39,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:48:39,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579227071] [2020-07-20 11:48:39,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:48:39,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:48:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:48:39,512 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-07-20 11:48:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:39,537 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-20 11:48:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:48:39,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 11:48:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:39,539 INFO L225 Difference]: With dead ends: 15 [2020-07-20 11:48:39,539 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:48:39,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:48:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:48:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:48:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:48:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:48:39,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-20 11:48:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:39,543 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:48:39,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:48:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:48:39,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:48:39,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:39,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:48:39,838 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:39,838 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:39,839 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:39,839 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:39,839 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:48:39,839 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:39,839 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:39,839 INFO L271 CegarLoopResult]: At program point L27-2(lines 27 33) the Hoare annotation is: true [2020-07-20 11:48:39,840 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 37) no Hoare annotation was computed. [2020-07-20 11:48:39,840 INFO L271 CegarLoopResult]: At program point L27-3(lines 27 33) the Hoare annotation is: true [2020-07-20 11:48:39,840 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 37) no Hoare annotation was computed. [2020-07-20 11:48:39,840 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 37) the Hoare annotation is: true [2020-07-20 11:48:39,841 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-07-20 11:48:39,841 INFO L271 CegarLoopResult]: At program point L18-3(lines 18 20) the Hoare annotation is: true [2020-07-20 11:48:39,841 INFO L268 CegarLoopResult]: For program point L18-4(lines 18 20) no Hoare annotation was computed. [2020-07-20 11:48:39,841 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-20 11:48:39,841 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 11:48:39,842 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:48:39,842 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 11:48:39,842 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-20 11:48:39,842 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 11:48:39,842 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-20 11:48:39,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:39 BoogieIcfgContainer [2020-07-20 11:48:39,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:39,858 INFO L168 Benchmark]: Toolchain (without parser) took 2019.79 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 102.0 MB in the beginning and 125.4 MB in the end (delta: -23.4 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,859 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 137.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.66 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,861 INFO L168 Benchmark]: Boogie Preprocessor took 155.34 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,862 INFO L168 Benchmark]: RCFGBuilder took 442.13 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 165.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,863 INFO L168 Benchmark]: TraceAbstraction took 1113.64 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 125.4 MB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:39,868 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 137.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.66 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.34 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.13 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 165.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1113.64 ms. Allocated memory is still 202.9 MB. Free memory was 165.7 MB in the beginning and 125.4 MB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 27]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 1 SDslu, 25 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 8 LocationsWithAnnotation, 9 PreInvPairs, 11 NumberOfFragments, 8 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 336 SizeOfPredicates, 2 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 4 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...