/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:04:42,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:04:42,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:04:42,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:04:42,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:04:42,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:04:42,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:04:42,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:04:42,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:04:42,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:04:42,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:04:42,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:04:42,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:04:42,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:04:42,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:04:42,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:04:42,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:04:42,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:04:42,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:04:42,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:04:42,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:04:42,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:04:42,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:04:42,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:04:42,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:04:42,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:04:42,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:04:42,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:04:42,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:04:42,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:04:42,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:04:42,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:04:42,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:04:42,378 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:04:42,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:04:42,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:04:42,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:04:42,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:04:42,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:04:42,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:04:42,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:04:42,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:04:42,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:04:42,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:04:42,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:04:42,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:04:42,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:42,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:04:42,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:04:42,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:04:42,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:04:42,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:04:42,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:04:42,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:04:42,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:04:42,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:04:42,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:04:42,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:04:42,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:04:42,888 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:04:42,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2020-12-22 07:04:43,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad8065/282756731c8c431288a3e529867936e8/FLAG5122a80b6 [2020-12-22 07:04:43,599 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:43,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/simple-recursive.c [2020-12-22 07:04:43,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad8065/282756731c8c431288a3e529867936e8/FLAG5122a80b6 [2020-12-22 07:04:43,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ad8065/282756731c8c431288a3e529867936e8 [2020-12-22 07:04:43,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:43,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:43,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:43,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:43,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:43,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:43" (1/1) ... [2020-12-22 07:04:43,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d88075d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:43, skipping insertion in model container [2020-12-22 07:04:43,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:43" (1/1) ... [2020-12-22 07:04:43,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:43,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:44,160 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/simple-recursive.c[439,452] [2020-12-22 07:04:44,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:44,182 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:44,197 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/simple-recursive.c[439,452] [2020-12-22 07:04:44,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:44,214 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:44,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44 WrapperNode [2020-12-22 07:04:44,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:44,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:44,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:44,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:44,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:44,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:44,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:44,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:44,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (1/1) ... [2020-12-22 07:04:44,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:44,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:44,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:44,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:44,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (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 [2020-12-22 07:04:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-12-22 07:04:44,391 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-12-22 07:04:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:44,391 INFO L130 BoogieDeclarations]: Found specification of procedure plus [2020-12-22 07:04:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure plus [2020-12-22 07:04:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 07:04:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:44,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:44,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 07:04:44,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 07:04:44,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:44,683 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:04:44,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:44 BoogieIcfgContainer [2020-12-22 07:04:44,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:44,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:44,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:44,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:44,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:43" (1/3) ... [2020-12-22 07:04:44,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdee5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:44, skipping insertion in model container [2020-12-22 07:04:44,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:44" (2/3) ... [2020-12-22 07:04:44,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdee5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:44, skipping insertion in model container [2020-12-22 07:04:44,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:44" (3/3) ... [2020-12-22 07:04:44,697 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-recursive.c [2020-12-22 07:04:44,706 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:44,711 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:44,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:44,825 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:44,826 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:44,826 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:44,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:44,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:44,827 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:44,827 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:44,827 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-22 07:04:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 07:04:44,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:44,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:44,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash -694887038, now seen corresponding path program 1 times [2020-12-22 07:04:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:44,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287279970] [2020-12-22 07:04:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287279970] [2020-12-22 07:04:45,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:04:45,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:04:45,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16928068] [2020-12-22 07:04:45,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:04:45,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:04:45,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:04:45,256 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-12-22 07:04:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:45,407 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-12-22 07:04:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:04:45,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 07:04:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:45,418 INFO L225 Difference]: With dead ends: 33 [2020-12-22 07:04:45,418 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 07:04:45,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:04:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 07:04:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-22 07:04:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 07:04:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 07:04:45,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2020-12-22 07:04:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:45,472 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 07:04:45,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:04:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 07:04:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 07:04:45,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:45,475 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:45,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:04:45,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2070363059, now seen corresponding path program 1 times [2020-12-22 07:04:45,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:45,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079677173] [2020-12-22 07:04:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:45,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079677173] [2020-12-22 07:04:45,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998557281] [2020-12-22 07:04:45,670 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 [2020-12-22 07:04:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 07:04:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:45,869 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:04:45,871 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:45,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:45,875 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:45,875 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 07:04:45,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:04:45,923 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:45,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:45,926 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:45,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-12-22 07:04:46,010 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-12-22 07:04:46,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:46,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-12-22 07:04:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:46,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:46,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-12-22 07:04:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313761414] [2020-12-22 07:04:46,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:04:46,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:04:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:04:46,022 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-12-22 07:04:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:46,138 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 07:04:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:04:46,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-22 07:04:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:46,140 INFO L225 Difference]: With dead ends: 22 [2020-12-22 07:04:46,140 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 07:04:46,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 07:04:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 07:04:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:04:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 07:04:46,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-12-22 07:04:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:46,148 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 07:04:46,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:04:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 07:04:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 07:04:46,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:46,151 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:46,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 07:04:46,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -176397214, now seen corresponding path program 2 times [2020-12-22 07:04:46,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:46,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230166820] [2020-12-22 07:04:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230166820] [2020-12-22 07:04:46,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262852983] [2020-12-22 07:04:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:46,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 07:04:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:46,683 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:04:46,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,700 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:46,701 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,702 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 07:04:46,724 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:04:46,726 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:46,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-12-22 07:04:46,819 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:04:46,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,823 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:46,824 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-12-22 07:04:46,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-12-22 07:04:46,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:46,909 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:46,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2020-12-22 07:04:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:46,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:46,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2020-12-22 07:04:46,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837751616] [2020-12-22 07:04:46,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 07:04:46,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 07:04:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:04:46,916 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 20 states. [2020-12-22 07:04:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:47,142 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 07:04:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:04:47,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-12-22 07:04:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:47,144 INFO L225 Difference]: With dead ends: 27 [2020-12-22 07:04:47,144 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 07:04:47,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-12-22 07:04:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 07:04:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 07:04:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 07:04:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 07:04:47,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-12-22 07:04:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:47,152 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 07:04:47,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 07:04:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 07:04:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 07:04:47,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:47,153 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:47,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:47,368 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash -978155155, now seen corresponding path program 3 times [2020-12-22 07:04:47,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:47,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446119800] [2020-12-22 07:04:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:47,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446119800] [2020-12-22 07:04:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081980693] [2020-12-22 07:04:47,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:47,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 07:04:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 07:04:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:47,763 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 07:04:47,765 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:47,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:1 [2020-12-22 07:04:47,844 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:04:47,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:47,849 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:7 [2020-12-22 07:04:47,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-12-22 07:04:47,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:04:47,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:04:47,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-12-22 07:04:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:48,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:48,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-22 07:04:48,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988602] [2020-12-22 07:04:48,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 07:04:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 07:04:48,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-12-22 07:04:48,008 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 24 states. [2020-12-22 07:04:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:48,556 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-22 07:04:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 07:04:48,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2020-12-22 07:04:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:48,557 INFO L225 Difference]: With dead ends: 30 [2020-12-22 07:04:48,557 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:04:48,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 07:04:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:04:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:04:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:04:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:04:48,560 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-12-22 07:04:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:48,560 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:04:48,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 07:04:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:04:48,561 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:04:48,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:48,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:04:49,106 INFO L189 CegarLoopUtils]: For program point fooEXIT(lines 11 20) no Hoare annotation was computed. [2020-12-22 07:04:49,107 INFO L185 CegarLoopUtils]: At program point fooENTRY(lines 11 20) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse1 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or (not (<= .cse0 13)) (<= .cse1 13)) (or (not (= .cse0 11)) (= 11 .cse1)) (or (not (= .cse0 10)) (= 10 .cse1)) (or (not (= .cse0 12)) (= 12 .cse1)) (or (not (< .cse0 21)) (< .cse1 21)))) [2020-12-22 07:04:49,107 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-22 07:04:49,107 INFO L189 CegarLoopUtils]: For program point fooErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 07:04:49,108 INFO L189 CegarLoopUtils]: For program point L14(lines 14 19) no Hoare annotation was computed. [2020-12-22 07:04:49,108 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (let ((.cse0 (select (select |old(#memory_int)| |foo_#in~p.base|) |foo_#in~p.offset|)) (.cse2 (select (select |#memory_int| foo_~p.base) foo_~p.offset)) (.cse1 (select (select |#memory_int| |foo_#in~p.base|) |foo_#in~p.offset|))) (and (or (not (<= .cse0 13)) (<= .cse1 13)) (or (not (< .cse0 21)) (and (< .cse2 20) (< .cse1 21))) (or (and (= .cse2 11) (= 11 .cse1)) (not (= .cse0 11))) (or (not (= .cse0 10)) (and (= .cse2 10) (= 10 .cse1))) (or (not (= .cse0 12)) (and (<= .cse2 12) (<= .cse1 12))))) [2020-12-22 07:04:49,108 INFO L189 CegarLoopUtils]: For program point L12(lines 12 19) no Hoare annotation was computed. [2020-12-22 07:04:49,108 INFO L189 CegarLoopUtils]: For program point L12-1(lines 11 20) no Hoare annotation was computed. [2020-12-22 07:04:49,108 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (= (select (select |#memory_int| ULTIMATE.start_main_~p~0.base) ULTIMATE.start_main_~p~0.offset) 10) [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point L22(lines 22 28) no Hoare annotation was computed. [2020-12-22 07:04:49,109 INFO L189 CegarLoopUtils]: For program point plusFINAL(lines 6 9) no Hoare annotation was computed. [2020-12-22 07:04:49,110 INFO L185 CegarLoopUtils]: At program point plusENTRY(lines 6 9) the Hoare annotation is: (let ((.cse1 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse0 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (< .cse0 20) (not (< .cse1 20))) (or (= .cse0 10) (not (= .cse1 10))) (or (not (= .cse1 11)) (= .cse0 11)) (or (not (<= .cse1 12)) (<= .cse0 12)))) [2020-12-22 07:04:49,110 INFO L189 CegarLoopUtils]: For program point plusEXIT(lines 6 9) no Hoare annotation was computed. [2020-12-22 07:04:49,110 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (let ((.cse2 (select (select |old(#memory_int)| |plus_#in~p.base|) |plus_#in~p.offset|)) (.cse0 (select (select |#memory_int| plus_~p.base) plus_~p.offset)) (.cse1 (select (select |#memory_int| |plus_#in~p.base|) |plus_#in~p.offset|))) (and (or (and (= .cse0 11) (= .cse1 11)) (not (= .cse2 10))) (or (< .cse0 21) (not (< .cse2 20))) (or (not (<= .cse2 12)) (and (<= .cse0 13) (< .cse1 20))) (or (not (= .cse2 11)) (and (= .cse0 12) (<= .cse1 12))))) [2020-12-22 07:04:49,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:04:49 BoogieIcfgContainer [2020-12-22 07:04:49,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:04:49,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:04:49,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:04:49,117 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:04:49,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:44" (3/4) ... [2020-12-22 07:04:49,121 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:04:49,129 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-12-22 07:04:49,129 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure plus [2020-12-22 07:04:49,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-22 07:04:49,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-22 07:04:49,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 07:04:49,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:04:49,174 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-with-pointer/simple-recursive.c-witness.graphml [2020-12-22 07:04:49,175 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:04:49,176 INFO L168 Benchmark]: Toolchain (without parser) took 5217.11 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 127.2 MB in the beginning and 98.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 63.6 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,177 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory was 135.6 MB in the beginning and 135.4 MB in the end (delta: 139.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:04:49,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.27 ms. Allocated memory is still 153.1 MB. Free memory was 127.0 MB in the beginning and 117.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,179 INFO L168 Benchmark]: Boogie Preprocessor took 24.80 ms. Allocated memory is still 153.1 MB. Free memory was 116.4 MB in the beginning and 115.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,180 INFO L168 Benchmark]: RCFGBuilder took 408.41 ms. Allocated memory is still 153.1 MB. Free memory was 115.4 MB in the beginning and 130.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,180 INFO L168 Benchmark]: TraceAbstraction took 4428.30 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 129.7 MB in the beginning and 100.8 MB in the end (delta: 28.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,181 INFO L168 Benchmark]: Witness Printer took 57.93 ms. Allocated memory is still 185.6 MB. Free memory was 100.8 MB in the beginning and 98.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:49,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory was 135.6 MB in the beginning and 135.4 MB in the end (delta: 139.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.27 ms. Allocated memory is still 153.1 MB. Free memory was 127.0 MB in the beginning and 117.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.80 ms. Allocated memory is still 153.1 MB. Free memory was 116.4 MB in the beginning and 115.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.41 ms. Allocated memory is still 153.1 MB. Free memory was 115.4 MB in the beginning and 130.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4428.30 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 129.7 MB in the beginning and 100.8 MB in the end (delta: 28.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 8.0 GB. * Witness Printer took 57.93 ms. Allocated memory is still 185.6 MB. Free memory was 100.8 MB in the beginning and 98.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 12 SDslu, 116 SDs, 0 SdLazy, 449 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 355 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 115 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 109 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 8650 SizeOfPredicates, 47 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/64 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...