/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/array-fpi/ifncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:56:16,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:56:16,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:56:16,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:56:16,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:56:16,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:56:16,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:56:16,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:56:16,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:56:16,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:56:16,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:56:16,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:56:16,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:56:16,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:56:16,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:56:16,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:56:16,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:56:16,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:56:16,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:56:16,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:56:16,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:56:16,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:56:16,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:56:16,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:56:16,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:56:16,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:56:16,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:56:16,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:56:16,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:56:16,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:56:16,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:56:16,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:56:16,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:56:16,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:56:16,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:56:16,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:56:16,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:56:16,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:56:16,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:56:16,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:56:16,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:56:16,604 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:56:16,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:56:16,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:56:16,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:56:16,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:56:16,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:56:16,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:56:16,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:56:16,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:56:16,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:56:16,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:56:16,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:56:16,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:56:16,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:56:16,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:56:16,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:56:16,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:56:16,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:56:16,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:56:16,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:56:16,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:56:16,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:56:17,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:56:17,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:56:17,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:56:17,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:56:17,197 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:56:17,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifncompf.c [2020-12-21 22:56:17,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b9f4f87/be16f5eb3a3343ee913a551c56e64ba7/FLAG77810dad4 [2020-12-21 22:56:18,215 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:56:18,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifncompf.c [2020-12-21 22:56:18,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b9f4f87/be16f5eb3a3343ee913a551c56e64ba7/FLAG77810dad4 [2020-12-21 22:56:18,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b9f4f87/be16f5eb3a3343ee913a551c56e64ba7 [2020-12-21 22:56:18,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:56:18,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:56:18,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:56:18,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:56:18,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:56:18,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea0d520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18, skipping insertion in model container [2020-12-21 22:56:18,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:56:18,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:56:18,784 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/array-fpi/ifncompf.c[591,604] [2020-12-21 22:56:18,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:56:18,832 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:56:18,851 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/array-fpi/ifncompf.c[591,604] [2020-12-21 22:56:18,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:56:18,887 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:56:18,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18 WrapperNode [2020-12-21 22:56:18,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:56:18,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:56:18,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:56:18,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:56:18,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:56:18,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:56:18,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:56:18,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:56:18,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (1/1) ... [2020-12-21 22:56:18,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:56:18,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:56:18,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:56:18,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:56:18,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (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 [2020-12-21 22:56:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:56:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:56:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:56:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:56:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:56:19,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:56:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:56:19,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:56:19,651 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:56:19,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:56:19 BoogieIcfgContainer [2020-12-21 22:56:19,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:56:19,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:56:19,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:56:19,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:56:19,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:56:18" (1/3) ... [2020-12-21 22:56:19,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a5fb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:56:19, skipping insertion in model container [2020-12-21 22:56:19,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:18" (2/3) ... [2020-12-21 22:56:19,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a5fb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:56:19, skipping insertion in model container [2020-12-21 22:56:19,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:56:19" (3/3) ... [2020-12-21 22:56:19,669 INFO L111 eAbstractionObserver]: Analyzing ICFG ifncompf.c [2020-12-21 22:56:19,680 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:56:19,688 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:56:19,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:56:19,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:56:19,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:56:19,853 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:56:19,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:56:19,854 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:56:19,855 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:56:19,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:56:19,855 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:56:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 22:56:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:56:19,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:56:19,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:56:19,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:56:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:56:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2020-12-21 22:56:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:56:19,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731285713] [2020-12-21 22:56:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:56:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:56:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:56:20,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731285713] [2020-12-21 22:56:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:56:20,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:56:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529603552] [2020-12-21 22:56:20,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:56:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:56:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:56:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:56:20,436 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 22:56:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:56:20,475 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2020-12-21 22:56:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:56:20,477 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-21 22:56:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:56:20,511 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:56:20,512 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:56:20,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:56:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:56:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 22:56:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:56:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-21 22:56:20,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2020-12-21 22:56:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:56:20,599 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-21 22:56:20,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:56:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-21 22:56:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:56:20,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:56:20,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:56:20,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:56:20,607 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:56:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:56:20,616 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2020-12-21 22:56:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:56:20,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478481922] [2020-12-21 22:56:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:56:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:56:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:56:20,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478481922] [2020-12-21 22:56:20,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:56:20,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:56:20,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154176477] [2020-12-21 22:56:20,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:56:20,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:56:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:56:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:56:20,865 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-12-21 22:56:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:56:21,083 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-12-21 22:56:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:56:21,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:56:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:56:21,087 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:56:21,088 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 22:56:21,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:56:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 22:56:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-12-21 22:56:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:56:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 22:56:21,118 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2020-12-21 22:56:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:56:21,118 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 22:56:21,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:56:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 22:56:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:56:21,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:56:21,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:56:21,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:56:21,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:56:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:56:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2020-12-21 22:56:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:56:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358585304] [2020-12-21 22:56:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:56:21,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:56:21,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290951353] [2020-12-21 22:56:21,201 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 [2020-12-21 22:56:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 22:56:21,308 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 22:56:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 22:56:21,337 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 22:56:21,441 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 22:56:21,442 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 22:56:21,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:56:21,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:56:21 BoogieIcfgContainer [2020-12-21 22:56:21,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 22:56:21,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 22:56:21,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 22:56:21,725 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 22:56:21,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:56:19" (3/4) ... [2020-12-21 22:56:21,730 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-21 22:56:21,815 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ifncompf.c-witness.graphml [2020-12-21 22:56:21,815 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 22:56:21,819 INFO L168 Benchmark]: Toolchain (without parser) took 3315.81 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 74.2 MB in the end (delta: 53.3 MB). Peak memory consumption was 51.7 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,820 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 22:56:21,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.74 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 116.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.94 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,823 INFO L168 Benchmark]: Boogie Preprocessor took 41.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,824 INFO L168 Benchmark]: RCFGBuilder took 662.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 128.2 MB in the end (delta: -14.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,825 INFO L168 Benchmark]: TraceAbstraction took 2066.12 ms. Allocated memory is still 151.0 MB. Free memory was 128.2 MB in the beginning and 77.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,826 INFO L168 Benchmark]: Witness Printer took 91.63 ms. Allocated memory is still 151.0 MB. Free memory was 77.3 MB in the beginning and 74.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-21 22:56:21,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 384.74 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 116.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.94 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.01 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 662.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 128.2 MB in the end (delta: -14.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2066.12 ms. Allocated memory is still 151.0 MB. Free memory was 128.2 MB in the beginning and 77.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. * Witness Printer took 91.63 ms. Allocated memory is still 151.0 MB. Free memory was 77.3 MB in the beginning and 74.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=1] [L32] COND TRUE i