/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-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:02:55,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:02:55,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:02:55,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:02:55,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:02:55,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:02:55,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:02:55,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:02:55,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:02:55,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:02:55,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:02:55,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:02:55,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:02:55,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:02:55,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:02:55,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:02:55,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:02:55,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:02:55,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:02:55,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:02:55,194 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 22:02:55,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:02:55,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:02:55,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:02:55,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:02:55,260 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:02:55,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:02:55,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:02:55,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:02:55,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:02:55,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:02:55,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:02:55,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:02:55,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:02:55,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:02:55,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:02:55,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:02:55,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:02:55,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:02:55,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:02:55,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:02:55,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:02:55,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:02:55,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:02:55,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:02:55,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:02:55,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:02:55,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:02:55,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:02:55,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:02:55,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:02:55,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:02:55,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:02:55,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:02:55,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:02:55,724 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:02:55,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-11-06 22:02:55,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5144c7f/91844d41726d49509c0c523eeaa7c1e1/FLAGa61c7c1b9 [2020-11-06 22:02:56,413 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:02:56,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-11-06 22:02:56,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5144c7f/91844d41726d49509c0c523eeaa7c1e1/FLAGa61c7c1b9 [2020-11-06 22:02:56,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a5144c7f/91844d41726d49509c0c523eeaa7c1e1 [2020-11-06 22:02:56,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:02:56,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:02:56,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:56,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:02:56,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:02:56,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:56" (1/1) ... [2020-11-06 22:02:56,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f141adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:56, skipping insertion in model container [2020-11-06 22:02:56,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:56" (1/1) ... [2020-11-06 22:02:56,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:02:56,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:02:57,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:57,050 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:02:57,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:57,087 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:02:57,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57 WrapperNode [2020-11-06 22:02:57,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:57,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:02:57,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:02:57,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:02:57,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (1/1) ... [2020-11-06 22:02:57,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:02:57,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:02:57,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:02:57,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:02:57,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (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 22:02:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:02:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:02:57,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:02:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-06 22:02:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:02:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:02:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:02:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:02:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:02:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-06 22:02:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:02:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:02:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:02:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:02:57,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:02:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:02:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:02:57,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:02:57,523 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:02:57,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:57 BoogieIcfgContainer [2020-11-06 22:02:57,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:02:57,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:02:57,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:02:57,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:02:57,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:56" (1/3) ... [2020-11-06 22:02:57,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0805f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:57, skipping insertion in model container [2020-11-06 22:02:57,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:57" (2/3) ... [2020-11-06 22:02:57,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0805f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:57, skipping insertion in model container [2020-11-06 22:02:57,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:57" (3/3) ... [2020-11-06 22:02:57,549 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-11-06 22:02:57,595 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:02:57,604 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:02:57,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:02:57,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:02:57,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:02:57,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:02:57,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:02:57,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:02:57,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:02:57,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:02:57,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:02:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-06 22:02:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:02:57,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:57,679 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:57,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:57,686 INFO L82 PathProgramCache]: Analyzing trace with hash -56492575, now seen corresponding path program 1 times [2020-11-06 22:02:57,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:57,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030865641] [2020-11-06 22:02:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:58,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:02:58,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030865641] [2020-11-06 22:02:58,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077151971] [2020-11-06 22:02:58,045 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 22:02:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:02:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:02:58,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:02:58,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-06 22:02:58,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661565018] [2020-11-06 22:02:58,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:02:58,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:02:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:02:58,225 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-11-06 22:02:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:58,271 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-06 22:02:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:02:58,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-06 22:02:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:58,279 INFO L225 Difference]: With dead ends: 29 [2020-11-06 22:02:58,279 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:02:58,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:02:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:02:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:02:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:02:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:02:58,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-06 22:02:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:58,311 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:02:58,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:02:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:02:58,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:02:58,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 22:02:58,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:02:58,558 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:02:58,558 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:02:58,559 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:02:58,559 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:02:58,559 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:58,559 INFO L269 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:02:58,559 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:58,560 INFO L266 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-06 22:02:58,560 INFO L262 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-11-06 22:02:58,560 INFO L266 CegarLoopResult]: For program point fEXIT(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:02:58,560 INFO L262 CegarLoopResult]: At program point L8-1(lines 5 10) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-11-06 22:02:58,560 INFO L266 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-11-06 22:02:58,561 INFO L269 CegarLoopResult]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2020-11-06 22:02:58,561 INFO L266 CegarLoopResult]: For program point fFINAL(lines 5 10) no Hoare annotation was computed. [2020-11-06 22:02:58,561 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:58,561 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:02:58,561 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:02:58,561 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:58,561 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 12 14) the Hoare annotation is: true [2020-11-06 22:02:58,562 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 12 14) no Hoare annotation was computed. [2020-11-06 22:02:58,562 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 12 14) no Hoare annotation was computed. [2020-11-06 22:02:58,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:02:58 BoogieIcfgContainer [2020-11-06 22:02:58,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:02:58,570 INFO L168 Benchmark]: Toolchain (without parser) took 1768.85 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 99.5 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:58,571 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:02:58,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 116.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:58,574 INFO L168 Benchmark]: Boogie Preprocessor took 51.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:58,575 INFO L168 Benchmark]: RCFGBuilder took 381.10 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 103.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:58,576 INFO L168 Benchmark]: TraceAbstraction took 1037.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 99.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:58,580 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 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 116.0 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 381.10 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 103.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1037.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 99.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.7 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 5 SDslu, 17 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 14 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 924 SizeOfPredicates, 1 NumberOfNonLiveVariables, 95 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...