/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/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:41:19,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:41:19,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:41:19,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:41:19,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:41:19,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:41:19,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:41:19,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:41:19,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:41:19,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:41:19,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:41:19,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:41:19,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:41:19,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:41:19,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:41:19,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:41:19,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:41:19,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:41:19,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:41:19,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:41:19,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:41:19,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:41:19,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:41:19,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:41:19,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:41:19,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:41:19,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:41:19,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:41:19,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:41:19,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 10:41:19,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 10:41:19,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 10:41:19,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 10:41:19,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 10:41:19,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 10:41:19,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 10:41:19,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 10:41:19,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 10:41:19,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:41:19,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:41:19,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:41:19,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:41:19,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:41:19,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:41:19,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:41:19,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:41:19,140 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:41:19,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:41:19,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:41:19,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:41:19,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:41:19,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:41:19,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:41:19,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:41:19,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:41:19,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:41:19,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:41:19,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:41:19,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:41:19,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:41:19,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:41:19,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:41:19,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:41:19,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:19,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:41:19,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:41:19,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:41:19,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:41:19,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:41:19,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:41:19,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:41:19,504 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:41:19,505 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-21 10:41:19,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d31b6ac4/28e79c73fc7f43698caaad65c41d53a2/FLAG3a6dae29f [2020-07-21 10:41:20,073 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:41:20,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-21 10:41:20,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d31b6ac4/28e79c73fc7f43698caaad65c41d53a2/FLAG3a6dae29f [2020-07-21 10:41:20,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d31b6ac4/28e79c73fc7f43698caaad65c41d53a2 [2020-07-21 10:41:20,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:41:20,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:41:20,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:41:20,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:41:20,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:41:20,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20, skipping insertion in model container [2020-07-21 10:41:20,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:41:20,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:41:20,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:41:20,739 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:41:20,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:41:20,781 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:41:20,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20 WrapperNode [2020-07-21 10:41:20,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:41:20,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:41:20,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:41:20,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:41:20,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... [2020-07-21 10:41:20,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:41:20,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:41:20,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:41:20,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:41:20,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:41:21,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:41:21,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:41:21,043 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-21 10:41:21,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:41:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:41:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:41:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-21 10:41:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:41:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:41:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:41:21,256 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:41:21,256 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:41:21,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:21 BoogieIcfgContainer [2020-07-21 10:41:21,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:41:21,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:41:21,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:41:21,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:41:21,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:20" (1/3) ... [2020-07-21 10:41:21,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f463d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:21, skipping insertion in model container [2020-07-21 10:41:21,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:20" (2/3) ... [2020-07-21 10:41:21,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f463d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:21, skipping insertion in model container [2020-07-21 10:41:21,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:21" (3/3) ... [2020-07-21 10:41:21,270 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-21 10:41:21,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:41:21,291 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:41:21,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:41:21,333 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:41:21,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:41:21,334 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:41:21,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:41:21,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:41:21,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:41:21,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:41:21,335 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:41:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 10:41:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:41:21,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:21,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:21,361 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-07-21 10:41:21,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:21,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579027039] [2020-07-21 10:41:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:41:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:41:21,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:41:21,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579027039] [2020-07-21 10:41:21,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:41:21,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:41:21,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749495015] [2020-07-21 10:41:21,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:41:21,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:41:21,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:41:21,638 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-07-21 10:41:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:21,802 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-21 10:41:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:41:21,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 10:41:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:21,818 INFO L225 Difference]: With dead ends: 34 [2020-07-21 10:41:21,819 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 10:41:21,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:41:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 10:41:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 10:41:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 10:41:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-07-21 10:41:21,888 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-07-21 10:41:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:21,890 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-07-21 10:41:21,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:41:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-07-21 10:41:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 10:41:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:21,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:22,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:22,111 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-07-21 10:41:22,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:22,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595273020] [2020-07-21 10:41:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:41:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:41:22,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:22,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 10:41:22,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 10:41:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:41:22,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595273020] [2020-07-21 10:41:22,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:22,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2020-07-21 10:41:22,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831637928] [2020-07-21 10:41:22,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:41:22,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:41:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:41:22,757 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 15 states. [2020-07-21 10:41:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:22,933 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-21 10:41:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:41:22,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-07-21 10:41:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:22,935 INFO L225 Difference]: With dead ends: 20 [2020-07-21 10:41:22,935 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:41:22,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:41:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:41:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:41:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:41:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:41:22,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-21 10:41:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:22,939 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:41:22,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:41:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:41:22,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:41:23,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:23,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:41:23,241 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:41:23,241 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:23,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:23,242 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:41:23,242 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:41:23,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:41:23,242 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-21 10:41:23,243 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-21 10:41:23,243 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-21 10:41:23,243 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-07-21 10:41:23,243 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-21 10:41:23,243 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-21 10:41:23,244 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-21 10:41:23,244 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-07-21 10:41:23,244 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-21 10:41:23,244 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-07-21 10:41:23,244 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-07-21 10:41:23,244 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-21 10:41:23,245 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-07-21 10:41:23,245 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-21 10:41:23,245 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-07-21 10:41:23,245 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-21 10:41:23,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:41:23 BoogieIcfgContainer [2020-07-21 10:41:23,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:41:23,255 INFO L168 Benchmark]: Toolchain (without parser) took 2825.30 ms. Allocated memory was 146.3 MB in the beginning and 232.3 MB in the end (delta: 86.0 MB). Free memory was 104.8 MB in the beginning and 144.6 MB in the end (delta: -39.8 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,256 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.36 ms. Allocated memory is still 146.3 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,258 INFO L168 Benchmark]: Boogie Preprocessor took 46.46 ms. Allocated memory is still 146.3 MB. Free memory was 95.1 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,260 INFO L168 Benchmark]: RCFGBuilder took 430.43 ms. Allocated memory was 146.3 MB in the beginning and 206.0 MB in the end (delta: 59.8 MB). Free memory was 93.8 MB in the beginning and 173.9 MB in the end (delta: -80.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,261 INFO L168 Benchmark]: TraceAbstraction took 1990.24 ms. Allocated memory was 206.0 MB in the beginning and 232.3 MB in the end (delta: 26.2 MB). Free memory was 173.2 MB in the beginning and 144.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:23,265 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.36 ms. Allocated memory is still 146.3 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.46 ms. Allocated memory is still 146.3 MB. Free memory was 95.1 MB in the beginning and 93.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.43 ms. Allocated memory was 146.3 MB in the beginning and 206.0 MB in the end (delta: 59.8 MB). Free memory was 93.8 MB in the beginning and 173.9 MB in the end (delta: -80.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1990.24 ms. Allocated memory was 206.0 MB in the beginning and 232.3 MB in the end (delta: 26.2 MB). Free memory was 173.2 MB in the beginning and 144.6 MB in the end (delta: 28.7 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 20 SDslu, 113 SDs, 0 SdLazy, 146 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s 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, 14 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 9 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 17/24 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...