/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:01:49,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:01:49,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:01:49,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:01:49,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:01:49,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:01:49,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:01:49,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:01:49,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:01:49,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:01:49,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:01:49,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:01:49,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:01:49,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:01:49,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:01:49,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:01:49,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:01:49,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:01:49,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:01:49,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:01:49,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:01:49,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:01:49,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:01:49,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:01:49,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:01:49,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:01:49,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:01:49,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:01:49,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:01:49,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:01:49,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:01:49,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:01:49,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:01:49,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:01:49,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:01:49,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:01:49,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:01:49,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:01:49,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:01:49,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:01:49,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:01:49,995 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 [2020-11-06 22:01:50,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:01:50,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:01:50,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:01:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:01:50,022 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:01:50,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:01:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:01:50,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:01:50,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:01:50,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:01:50,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:01:50,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:01:50,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:01:50,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:01:50,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:01:50,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:01:50,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:01:50,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:01:50,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:01:50,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:01:50,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:01:50,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:01:50,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:01:50,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:01:50,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:01:50,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:01:50,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:01:50,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:01:50,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:01:50,469 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:01:50,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-11-06 22:01:50,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522cf084b/a85e7f05c8cf45d38a55b30b822b98a2/FLAG5aab10e67 [2020-11-06 22:01:51,112 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:01:51,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-11-06 22:01:51,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522cf084b/a85e7f05c8cf45d38a55b30b822b98a2/FLAG5aab10e67 [2020-11-06 22:01:51,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/522cf084b/a85e7f05c8cf45d38a55b30b822b98a2 [2020-11-06 22:01:51,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:01:51,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:01:51,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:01:51,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:01:51,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:01:51,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdeba37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51, skipping insertion in model container [2020-11-06 22:01:51,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:01:51,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:01:51,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:01:51,697 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:01:51,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:01:51,727 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:01:51,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51 WrapperNode [2020-11-06 22:01:51,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:01:51,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:01:51,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:01:51,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:01:51,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (1/1) ... [2020-11-06 22:01:51,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:01:51,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:01:51,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:01:51,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:01:51,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (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 [2020-11-06 22:01:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:01:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:01:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:01:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-11-06 22:01:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:01:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:01:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:01:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:01:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:01:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:01:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-11-06 22:01:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:01:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:01:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:01:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:01:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:01:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:01:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:01:52,320 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:01:52,321 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:01:52,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:52 BoogieIcfgContainer [2020-11-06 22:01:52,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:01:52,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:01:52,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:01:52,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:01:52,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:51" (1/3) ... [2020-11-06 22:01:52,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69847d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:52, skipping insertion in model container [2020-11-06 22:01:52,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:51" (2/3) ... [2020-11-06 22:01:52,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69847d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:52, skipping insertion in model container [2020-11-06 22:01:52,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:52" (3/3) ... [2020-11-06 22:01:52,335 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-11-06 22:01:52,353 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:01:52,357 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:01:52,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:01:52,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:01:52,417 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:01:52,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:01:52,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:01:52,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:01:52,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:01:52,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:01:52,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:01:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-11-06 22:01:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:01:52,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:01:52,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:01:52,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:01:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:01:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1192398854, now seen corresponding path program 1 times [2020-11-06 22:01:52,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:01:52,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354667633] [2020-11-06 22:01:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:01:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:52,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:01:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:52,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:01:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:01:52,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354667633] [2020-11-06 22:01:52,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:01:52,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:01:52,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734048220] [2020-11-06 22:01:52,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:01:52,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:01:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:01:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:01:52,996 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-11-06 22:01:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:01:53,344 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-11-06 22:01:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:01:53,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-06 22:01:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:01:53,357 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:01:53,357 INFO L226 Difference]: Without dead ends: 22 [2020-11-06 22:01:53,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:01:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-06 22:01:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-06 22:01:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-06 22:01:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-06 22:01:53,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-11-06 22:01:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:01:53,411 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-06 22:01:53,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:01:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-06 22:01:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:01:53,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:01:53,414 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, 1, 1] [2020-11-06 22:01:53,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:01:53,415 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:01:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:01:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1407039891, now seen corresponding path program 1 times [2020-11-06 22:01:53,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:01:53,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353268961] [2020-11-06 22:01:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:01:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:01:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:01:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:01:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:01:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:01:53,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353268961] [2020-11-06 22:01:53,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436084870] [2020-11-06 22:01:53,762 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:01:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:01:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:01:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:01:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:01:53,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:01:53,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:01:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336645564] [2020-11-06 22:01:53,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:01:53,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:01:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:01:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:01:53,997 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 13 states. [2020-11-06 22:01:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:01:54,464 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-06 22:01:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:01:54,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-11-06 22:01:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:01:54,466 INFO L225 Difference]: With dead ends: 22 [2020-11-06 22:01:54,466 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:01:54,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:01:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:01:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:01:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:01:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:01:54,469 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-06 22:01:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:01:54,469 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:01:54,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:01:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:01:54,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:01:54,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:01:54,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:01:54,855 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:01:54,855 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:01:54,856 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:01:54,856 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:01:54,856 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:01:54,856 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:01:54,856 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:01:54,857 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:01:54,857 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:01:54,857 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:01:54,857 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:01:54,857 INFO L262 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: false [2020-11-06 22:01:54,857 INFO L266 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-11-06 22:01:54,858 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 26 34) the Hoare annotation is: true [2020-11-06 22:01:54,858 INFO L266 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-11-06 22:01:54,858 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 26 34) no Hoare annotation was computed. [2020-11-06 22:01:54,858 INFO L269 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-11-06 22:01:54,858 INFO L266 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-11-06 22:01:54,858 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 26 34) no Hoare annotation was computed. [2020-11-06 22:01:54,859 INFO L269 CegarLoopResult]: At program point f91ENTRY(lines 17 23) the Hoare annotation is: true [2020-11-06 22:01:54,859 INFO L266 CegarLoopResult]: For program point f91FINAL(lines 17 23) no Hoare annotation was computed. [2020-11-06 22:01:54,859 INFO L262 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|)) [2020-11-06 22:01:54,859 INFO L266 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-06 22:01:54,859 INFO L262 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret7| 101)) [2020-11-06 22:01:54,859 INFO L266 CegarLoopResult]: For program point f91EXIT(lines 17 23) no Hoare annotation was computed. [2020-11-06 22:01:54,859 INFO L266 CegarLoopResult]: For program point L18(lines 18 22) no Hoare annotation was computed. [2020-11-06 22:01:54,860 INFO L266 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-11-06 22:01:54,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:01:54 BoogieIcfgContainer [2020-11-06 22:01:54,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:01:54,868 INFO L168 Benchmark]: Toolchain (without parser) took 3392.63 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 125.9 MB in the beginning and 164.0 MB in the end (delta: -38.2 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:01:54,869 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:01:54,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.81 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:01:54,871 INFO L168 Benchmark]: Boogie Preprocessor took 35.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:01:54,871 INFO L168 Benchmark]: RCFGBuilder took 557.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:01:54,873 INFO L168 Benchmark]: TraceAbstraction took 2538.43 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 101.2 MB in the beginning and 164.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 78.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:01:54,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.81 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 557.56 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2538.43 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 101.2 MB in the beginning and 164.0 MB in the end (delta: -62.8 MB). Peak memory consumption was 78.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 42 SDslu, 73 SDs, 0 SdLazy, 193 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 10 LocationsWithAnnotation, 17 PreInvPairs, 17 NumberOfFragments, 55 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 150 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 6832 SizeOfPredicates, 5 NumberOfNonLiveVariables, 127 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 16/24 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...