/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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:40,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:40,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:40,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:40,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:40,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:40,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:40,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:40,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:40,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:40,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:40,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:40,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:40,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:40,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:40,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:40,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:40,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:40,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:40,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:40,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:40,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:40,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:40,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:40,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:21:40,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:21:40,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:21:40,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:21:40,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:21:40,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:21:40,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:21:40,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:21:40,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:21:40,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:21:40,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:21:40,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:21:40,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:21:40,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:21:40,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:40,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:40,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:40,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:40,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:40,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:40,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:40,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:40,545 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:40,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:40,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:40,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:40,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:40,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:40,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:40,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:40,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:40,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:40,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:40,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:40,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:40,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:40,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:40,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:40,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:40,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:40,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:40,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:40,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:40,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:41,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:41,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:41,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:41,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:41,085 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:41,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:41,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c12ead/901d80f4b7884a2b92aa17bc3347e808/FLAG14b5ffbbd [2020-12-22 04:21:41,948 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:41,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:41,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c12ead/901d80f4b7884a2b92aa17bc3347e808/FLAG14b5ffbbd [2020-12-22 04:21:42,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6c12ead/901d80f4b7884a2b92aa17bc3347e808 [2020-12-22 04:21:42,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:42,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:42,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:42,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:42,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:42,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6554c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42, skipping insertion in model container [2020-12-22 04:21:42,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:42,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:42,486 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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2020-12-22 04:21:42,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:42,574 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:42,590 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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2020-12-22 04:21:42,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:42,659 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:42,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42 WrapperNode [2020-12-22 04:21:42,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:42,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:42,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:42,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:42,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:42,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:42,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:42,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:42,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (1/1) ... [2020-12-22 04:21:42,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:42,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:42,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:42,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:42,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (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 04:21:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:21:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:21:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-12-22 04:21:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:42,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:21:43,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:43,437 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-22 04:21:43,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:43 BoogieIcfgContainer [2020-12-22 04:21:43,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:43,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:43,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:43,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:43,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:42" (1/3) ... [2020-12-22 04:21:43,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc850e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:43, skipping insertion in model container [2020-12-22 04:21:43,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:42" (2/3) ... [2020-12-22 04:21:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc850e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:43, skipping insertion in model container [2020-12-22 04:21:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:43" (3/3) ... [2020-12-22 04:21:43,449 INFO L111 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:43,455 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:43,461 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:43,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:43,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:43,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:43,512 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:43,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:43,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:43,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:43,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:43,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-12-22 04:21:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:21:43,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:43,539 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] [2020-12-22 04:21:43,539 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 297203850, now seen corresponding path program 1 times [2020-12-22 04:21:43,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:43,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909724073] [2020-12-22 04:21:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:43,761 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 04:21:43,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909724073] [2020-12-22 04:21:43,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:43,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:21:43,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567039950] [2020-12-22 04:21:43,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:21:43,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:43,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:21:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:21:43,788 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-12-22 04:21:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:43,833 INFO L93 Difference]: Finished difference Result 74 states and 110 transitions. [2020-12-22 04:21:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:21:43,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 04:21:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:43,846 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:21:43,847 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:21:43,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:21:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:21:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 04:21:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:21:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-22 04:21:43,898 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-12-22 04:21:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:43,898 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-22 04:21:43,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:21:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-22 04:21:43,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:21:43,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:43,902 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, 1, 1, 1] [2020-12-22 04:21:43,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:43,904 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1628968459, now seen corresponding path program 1 times [2020-12-22 04:21:43,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:43,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069992388] [2020-12-22 04:21:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:44,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069992388] [2020-12-22 04:21:44,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541838785] [2020-12-22 04:21:44,010 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 04:21:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 04:21:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:21:44,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:21:44,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 04:21:44,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561481098] [2020-12-22 04:21:44,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:21:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:21:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:44,160 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-22 04:21:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:44,186 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2020-12-22 04:21:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:21:44,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 04:21:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:44,191 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:21:44,191 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:21:44,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:21:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 04:21:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:21:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-12-22 04:21:44,206 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-12-22 04:21:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:44,206 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-12-22 04:21:44,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:21:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-12-22 04:21:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:21:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:44,210 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, 1, 1, 1] [2020-12-22 04:21:44,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:21:44,414 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1644930483, now seen corresponding path program 1 times [2020-12-22 04:21:44,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:44,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219950656] [2020-12-22 04:21:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:44,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219950656] [2020-12-22 04:21:44,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620234393] [2020-12-22 04:21:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 04:21:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:21:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:21:44,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:21:44,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 04:21:44,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258904396] [2020-12-22 04:21:44,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:21:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:44,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:21:44,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:21:44,645 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 5 states. [2020-12-22 04:21:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:44,757 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-12-22 04:21:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:21:44,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 04:21:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:44,759 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:21:44,759 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:21:44,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:21:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:21:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-12-22 04:21:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:21:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-22 04:21:44,766 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 26 [2020-12-22 04:21:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:44,767 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-22 04:21:44,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:21:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-22 04:21:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:21:44,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:44,769 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, 1, 1, 1] [2020-12-22 04:21:44,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:44,984 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -817771149, now seen corresponding path program 1 times [2020-12-22 04:21:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:44,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726727861] [2020-12-22 04:21:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:45,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726727861] [2020-12-22 04:21:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73891582] [2020-12-22 04:21:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:21:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:21:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:21:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105749986] [2020-12-22 04:21:45,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:21:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:21:45,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:45,146 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 5 states. [2020-12-22 04:21:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:45,167 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2020-12-22 04:21:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:45,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 04:21:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:45,168 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:21:45,168 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:21:45,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:21:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-22 04:21:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:21:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-22 04:21:45,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 26 [2020-12-22 04:21:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:45,176 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-22 04:21:45,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:21:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-22 04:21:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:21:45,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:45,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:45,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:45,391 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1849885685, now seen corresponding path program 2 times [2020-12-22 04:21:45,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:45,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413378087] [2020-12-22 04:21:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:21:45,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413378087] [2020-12-22 04:21:45,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:45,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:21:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650845628] [2020-12-22 04:21:45,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:21:45,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:21:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:21:45,528 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 4 states. [2020-12-22 04:21:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:45,602 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2020-12-22 04:21:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:21:45,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-12-22 04:21:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:45,603 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:21:45,606 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:21:45,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:21:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:21:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:21:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:21:45,608 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-22 04:21:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:45,608 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:21:45,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:21:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:21:45,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:21:45,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:21:45,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:21:45,652 INFO L192 CegarLoopUtils]: At program point L85(lines 58 86) the Hoare annotation is: true [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point L70-1(line 70) no Hoare annotation was computed. [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point L70-2(line 70) no Hoare annotation was computed. [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point L70-4(line 70) no Hoare annotation was computed. [2020-12-22 04:21:45,653 INFO L189 CegarLoopUtils]: For program point L70-6(line 70) no Hoare annotation was computed. [2020-12-22 04:21:45,654 INFO L192 CegarLoopUtils]: At program point L95(lines 87 96) the Hoare annotation is: true [2020-12-22 04:21:45,654 INFO L189 CegarLoopUtils]: For program point L62(line 62) no Hoare annotation was computed. [2020-12-22 04:21:45,655 INFO L192 CegarLoopUtils]: At program point L70-8(line 70) the Hoare annotation is: true [2020-12-22 04:21:45,655 INFO L189 CegarLoopUtils]: For program point L70-9(line 70) no Hoare annotation was computed. [2020-12-22 04:21:45,658 INFO L189 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2020-12-22 04:21:45,659 INFO L189 CegarLoopUtils]: For program point L71-2(line 71) no Hoare annotation was computed. [2020-12-22 04:21:45,659 INFO L189 CegarLoopUtils]: For program point L71-4(lines 65 83) no Hoare annotation was computed. [2020-12-22 04:21:45,659 INFO L189 CegarLoopUtils]: For program point L63-1(lines 63 84) no Hoare annotation was computed. [2020-12-22 04:21:45,659 INFO L189 CegarLoopUtils]: For program point L63-2(lines 63 84) no Hoare annotation was computed. [2020-12-22 04:21:45,659 INFO L185 CegarLoopUtils]: At program point L63-4(lines 63 84) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (< ULTIMATE.start_parse_expression_list_~j~0 (+ ULTIMATE.start_parse_expression_list_~start~0 1))) [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L63-5(lines 63 84) no Hoare annotation was computed. [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L72(lines 72 81) no Hoare annotation was computed. [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-22 04:21:45,660 INFO L185 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (< ULTIMATE.start_parse_expression_list_~j~0 (+ ULTIMATE.start_parse_expression_list_~start~0 1))) [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L73(lines 73 75) no Hoare annotation was computed. [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L65(lines 65 83) no Hoare annotation was computed. [2020-12-22 04:21:45,660 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:21:45,666 INFO L189 CegarLoopUtils]: For program point L90-2(lines 90 92) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L192 CegarLoopUtils]: At program point L90-3(lines 90 92) the Hoare annotation is: true [2020-12-22 04:21:45,667 INFO L189 CegarLoopUtils]: For program point L90-4(lines 90 92) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L189 CegarLoopUtils]: For program point L66(line 66) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:21:45,667 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (< ULTIMATE.start_parse_expression_list_~j~0 (+ ULTIMATE.start_parse_expression_list_~start~0 1)) [2020-12-22 04:21:45,668 INFO L189 CegarLoopUtils]: For program point L67-1(line 67) no Hoare annotation was computed. [2020-12-22 04:21:45,668 INFO L189 CegarLoopUtils]: For program point L67-3(line 67) no Hoare annotation was computed. [2020-12-22 04:21:45,668 INFO L185 CegarLoopUtils]: At program point L67-5(line 67) the Hoare annotation is: (or (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (< ULTIMATE.start_parse_expression_list_~j~0 (+ ULTIMATE.start_parse_expression_list_~start~0 1))) [2020-12-22 04:21:45,668 INFO L189 CegarLoopUtils]: For program point L67-6(line 67) no Hoare annotation was computed. [2020-12-22 04:21:45,668 INFO L189 CegarLoopUtils]: For program point L68(line 68) no Hoare annotation was computed. [2020-12-22 04:21:45,668 INFO L189 CegarLoopUtils]: For program point L68-2(line 68) no Hoare annotation was computed. [2020-12-22 04:21:45,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:21:45 BoogieIcfgContainer [2020-12-22 04:21:45,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:21:45,691 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:21:45,691 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:21:45,691 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:21:45,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:43" (3/4) ... [2020-12-22 04:21:45,696 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:21:45,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-22 04:21:45,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 04:21:45,722 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:21:45,722 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:21:45,791 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i-witness.graphml [2020-12-22 04:21:45,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:21:45,794 INFO L168 Benchmark]: Toolchain (without parser) took 3532.33 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 125.5 MB in the beginning and 111.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 49.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,797 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 81.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:45,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.65 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 113.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.51 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 111.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,800 INFO L168 Benchmark]: Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 110.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,802 INFO L168 Benchmark]: RCFGBuilder took 678.13 ms. Allocated memory is still 151.0 MB. Free memory was 110.2 MB in the beginning and 112.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,803 INFO L168 Benchmark]: TraceAbstraction took 2249.71 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 112.3 MB in the beginning and 115.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,804 INFO L168 Benchmark]: Witness Printer took 100.63 ms. Allocated memory is still 185.6 MB. Free memory was 115.5 MB in the beginning and 111.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:45,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 81.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 395.65 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 113.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.51 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 111.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.85 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 110.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 678.13 ms. Allocated memory is still 151.0 MB. Free memory was 110.2 MB in the beginning and 112.7 MB in the end (delta: -2.5 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2249.71 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 112.3 MB in the beginning and 115.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. * Witness Printer took 100.63 ms. Allocated memory is still 185.6 MB. Free memory was 115.5 MB in the beginning and 111.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - InvariantResult [Line: 87]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: j < start + 1 - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 63]: Loop Invariant Derived loop invariant: !(0 == cond) || j < start + 1 - InvariantResult [Line: 90]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: !(0 == cond) && j < start + 1 - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: !(0 == cond) || j < start + 1 - InvariantResult [Line: 70]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 82 SDslu, 301 SDs, 0 SdLazy, 110 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, 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, 5 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 21 NumberOfFragments, 39 HoareAnnotationTreeSize, 8 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 204 NumberOfCodeBlocks, 204 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 6067 SizeOfPredicates, 2 NumberOfNonLiveVariables, 376 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 6/10 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...