/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/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:44,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:44,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:44,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:44,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:44,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:44,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:44,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:44,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:44,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:44,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:44,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:44,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:44,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:44,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:44,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:44,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:44,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:44,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:44,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:44,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:44,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:44,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:44,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:44,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:21:44,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:21:44,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:21:44,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:21:44,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:21:44,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:21:44,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:21:44,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:21:44,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:21:44,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:21:44,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:21:44,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:21:44,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:21:44,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:21:44,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:44,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:44,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:44,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:44,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:44,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:44,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:44,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:44,689 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:44,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:44,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:44,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:44,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:44,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:44,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:44,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:44,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:44,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:44,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:44,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:44,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:44,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:44,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:44,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:44,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:44,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:44,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:44,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:44,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:44,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:45,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:45,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:45,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:45,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:45,095 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:45,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:45,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87fdc6463/0bdf8da6eaa1466d938a0cb7d03d6a1a/FLAG8b4ecd8c1 [2020-12-22 04:21:45,826 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:45,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:45,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87fdc6463/0bdf8da6eaa1466d938a0cb7d03d6a1a/FLAG8b4ecd8c1 [2020-12-22 04:21:46,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87fdc6463/0bdf8da6eaa1466d938a0cb7d03d6a1a [2020-12-22 04:21:46,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:46,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:46,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:46,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:46,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:46,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e73930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46, skipping insertion in model container [2020-12-22 04:21:46,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:46,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:46,458 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/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] [2020-12-22 04:21:46,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:46,534 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:46,550 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/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] [2020-12-22 04:21:46,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:46,614 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:46,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46 WrapperNode [2020-12-22 04:21:46,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:46,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:46,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:46,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:46,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:46,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:46,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:46,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:46,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (1/1) ... [2020-12-22 04:21:46,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:46,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:46,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:46,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:46,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (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 04:21:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:21:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:21:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-12-22 04:21:46,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:46,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:46,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:21:47,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:47,246 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 04:21:47,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:47 BoogieIcfgContainer [2020-12-22 04:21:47,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:47,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:47,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:47,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:47,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:46" (1/3) ... [2020-12-22 04:21:47,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6267e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:47, skipping insertion in model container [2020-12-22 04:21:47,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:46" (2/3) ... [2020-12-22 04:21:47,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6267e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:47, skipping insertion in model container [2020-12-22 04:21:47,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:47" (3/3) ... [2020-12-22 04:21:47,257 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-12-22 04:21:47,266 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:47,273 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:47,300 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:47,361 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:47,365 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:47,366 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:47,366 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:47,366 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:47,366 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:47,366 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:47,366 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-12-22 04:21:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:21:47,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:47,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:21:47,418 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash -649032135, now seen corresponding path program 1 times [2020-12-22 04:21:47,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:47,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72370504] [2020-12-22 04:21:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:47,738 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 04:21:47,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72370504] [2020-12-22 04:21:47,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:47,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:21:47,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926472451] [2020-12-22 04:21:47,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:21:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:47,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:21:47,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:47,776 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-12-22 04:21:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:47,809 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2020-12-22 04:21:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:21:47,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-22 04:21:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:47,823 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:21:47,823 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:21:47,828 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 [2020-12-22 04:21:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:21:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:21:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:21:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-12-22 04:21:47,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2020-12-22 04:21:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:47,879 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-12-22 04:21:47,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:21:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-12-22 04:21:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:21:47,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:47,882 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] [2020-12-22 04:21:47,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:47,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash -829015504, now seen corresponding path program 1 times [2020-12-22 04:21:47,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284066614] [2020-12-22 04:21:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:48,010 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 04:21:48,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284066614] [2020-12-22 04:21:48,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:48,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:21:48,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184135167] [2020-12-22 04:21:48,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:21:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:21:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:21:48,018 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 3 states. [2020-12-22 04:21:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:48,060 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-12-22 04:21:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:21:48,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 04:21:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:48,063 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:21:48,063 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:21:48,064 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 04:21:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:21:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:21:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:21:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-12-22 04:21:48,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2020-12-22 04:21:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:48,074 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-12-22 04:21:48,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:21:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-12-22 04:21:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:21:48,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:48,077 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] [2020-12-22 04:21:48,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:21:48,077 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:48,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2108879182, now seen corresponding path program 1 times [2020-12-22 04:21:48,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:48,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225319301] [2020-12-22 04:21:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:48,181 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 04:21:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225319301] [2020-12-22 04:21:48,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:48,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:21:48,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209739540] [2020-12-22 04:21:48,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:21:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:21:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:21:48,185 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2020-12-22 04:21:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:48,267 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2020-12-22 04:21:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:21:48,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-22 04:21:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:48,270 INFO L225 Difference]: With dead ends: 85 [2020-12-22 04:21:48,270 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:21:48,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:21:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:21:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2020-12-22 04:21:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:21:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-12-22 04:21:48,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 21 [2020-12-22 04:21:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:48,278 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-12-22 04:21:48,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:21:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-12-22 04:21:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:21:48,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:48,280 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] [2020-12-22 04:21:48,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:21:48,280 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2049773838, now seen corresponding path program 1 times [2020-12-22 04:21:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:48,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156944115] [2020-12-22 04:21:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:48,407 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 04:21:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156944115] [2020-12-22 04:21:48,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:48,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:21:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962601792] [2020-12-22 04:21:48,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:21:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:21:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:21:48,411 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 7 states. [2020-12-22 04:21:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:48,675 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-12-22 04:21:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:21:48,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-22 04:21:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:48,679 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:21:48,680 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:21:48,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:21:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:21:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-12-22 04:21:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:21:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-12-22 04:21:48,693 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 21 [2020-12-22 04:21:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-12-22 04:21:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:21:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-12-22 04:21:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:21:48,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:48,695 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] [2020-12-22 04:21:48,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:21:48,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1791608400, now seen corresponding path program 1 times [2020-12-22 04:21:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:48,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633919022] [2020-12-22 04:21:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:48,861 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 04:21:48,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633919022] [2020-12-22 04:21:48,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:48,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 04:21:48,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037286776] [2020-12-22 04:21:48,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:21:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:21:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:21:48,864 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 7 states. [2020-12-22 04:21:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:49,073 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2020-12-22 04:21:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:21:49,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-22 04:21:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:49,076 INFO L225 Difference]: With dead ends: 99 [2020-12-22 04:21:49,076 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:21:49,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:21:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:21:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-12-22 04:21:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:21:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2020-12-22 04:21:49,087 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 21 [2020-12-22 04:21:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:49,088 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2020-12-22 04:21:49,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:21:49,088 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2020-12-22 04:21:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:21:49,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:49,089 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] [2020-12-22 04:21:49,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:21:49,090 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:49,090 INFO L82 PathProgramCache]: Analyzing trace with hash -784963603, now seen corresponding path program 1 times [2020-12-22 04:21:49,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:49,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544967999] [2020-12-22 04:21:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:49,124 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 04:21:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544967999] [2020-12-22 04:21:49,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:49,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:21:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703686992] [2020-12-22 04:21:49,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:21:49,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:49,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:21:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:21:49,127 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand 4 states. [2020-12-22 04:21:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:49,157 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2020-12-22 04:21:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:49,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-22 04:21:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:49,159 INFO L225 Difference]: With dead ends: 128 [2020-12-22 04:21:49,159 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 04:21:49,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:21:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 04:21:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 04:21:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:21:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2020-12-22 04:21:49,169 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 23 [2020-12-22 04:21:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:49,169 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2020-12-22 04:21:49,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:21:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2020-12-22 04:21:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:21:49,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:49,171 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] [2020-12-22 04:21:49,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 04:21:49,172 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1177990613, now seen corresponding path program 1 times [2020-12-22 04:21:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:49,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995999647] [2020-12-22 04:21:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:49,221 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 04:21:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995999647] [2020-12-22 04:21:49,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:49,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 04:21:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797965063] [2020-12-22 04:21:49,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:21:49,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:21:49,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:21:49,224 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand 6 states. [2020-12-22 04:21:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:49,314 INFO L93 Difference]: Finished difference Result 189 states and 245 transitions. [2020-12-22 04:21:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:21:49,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-22 04:21:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:49,316 INFO L225 Difference]: With dead ends: 189 [2020-12-22 04:21:49,316 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:21:49,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:21:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:21:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2020-12-22 04:21:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:21:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-12-22 04:21:49,325 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 23 [2020-12-22 04:21:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:49,325 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-12-22 04:21:49,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:21:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-12-22 04:21:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:21:49,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:49,327 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-22 04:21:49,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 04:21:49,327 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1710953077, now seen corresponding path program 1 times [2020-12-22 04:21:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:49,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510224083] [2020-12-22 04:21:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:49,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510224083] [2020-12-22 04:21:49,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44620136] [2020-12-22 04:21:49,384 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 04:21:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:21:49,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:49,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:49,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-22 04:21:49,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609141889] [2020-12-22 04:21:49,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:21:49,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:49,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:21:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:21:49,573 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 7 states. [2020-12-22 04:21:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:49,705 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2020-12-22 04:21:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:21:49,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-22 04:21:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:49,707 INFO L225 Difference]: With dead ends: 222 [2020-12-22 04:21:49,707 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 04:21:49,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:21:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 04:21:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2020-12-22 04:21:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 04:21:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2020-12-22 04:21:49,720 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 28 [2020-12-22 04:21:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:49,721 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2020-12-22 04:21:49,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:21:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2020-12-22 04:21:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:21:49,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:49,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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 04:21:49,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 04:21:49,938 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2012014699, now seen corresponding path program 2 times [2020-12-22 04:21:49,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:49,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991295916] [2020-12-22 04:21:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991295916] [2020-12-22 04:21:50,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307104310] [2020-12-22 04:21:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:50,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:21:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:21:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:21:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:50,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:50,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-12-22 04:21:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841285570] [2020-12-22 04:21:50,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:21:50,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:50,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:21:50,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:21:50,471 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand 17 states. [2020-12-22 04:21:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:51,043 INFO L93 Difference]: Finished difference Result 249 states and 308 transitions. [2020-12-22 04:21:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:21:51,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-12-22 04:21:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:51,045 INFO L225 Difference]: With dead ends: 249 [2020-12-22 04:21:51,046 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 04:21:51,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:21:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 04:21:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 114. [2020-12-22 04:21:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:21:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2020-12-22 04:21:51,056 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 33 [2020-12-22 04:21:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:51,056 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2020-12-22 04:21:51,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:21:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2020-12-22 04:21:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:21:51,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:51,058 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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 04:21:51,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:21:51,274 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1000897449, now seen corresponding path program 1 times [2020-12-22 04:21:51,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:51,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33204878] [2020-12-22 04:21:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33204878] [2020-12-22 04:21:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074229897] [2020-12-22 04:21:51,384 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 04:21:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:21:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:21:51,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:51,635 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 04:21:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:51,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:21:51,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 04:21:51,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536802521] [2020-12-22 04:21:51,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:21:51,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:51,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:21:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:21:51,659 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand 16 states. [2020-12-22 04:21:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:52,159 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2020-12-22 04:21:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:21:52,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-22 04:21:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:52,161 INFO L225 Difference]: With dead ends: 220 [2020-12-22 04:21:52,161 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 04:21:52,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:21:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 04:21:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 133. [2020-12-22 04:21:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 04:21:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2020-12-22 04:21:52,171 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 33 [2020-12-22 04:21:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:52,172 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2020-12-22 04:21:52,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:21:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2020-12-22 04:21:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:21:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:52,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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 04:21:52,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:21:52,390 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1002744491, now seen corresponding path program 1 times [2020-12-22 04:21:52,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:52,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484870948] [2020-12-22 04:21:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:52,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 04:21:52,445 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 04:21:52,484 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 04:21:52,484 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 04:21:52,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 04:21:52,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:21:52 BoogieIcfgContainer [2020-12-22 04:21:52,565 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:21:52,566 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:21:52,566 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:21:52,566 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:21:52,567 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:47" (3/4) ... [2020-12-22 04:21:52,568 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 04:21:52,626 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i-witness.graphml [2020-12-22 04:21:52,626 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:21:52,628 INFO L168 Benchmark]: Toolchain (without parser) took 6440.98 ms. Allocated memory was 167.8 MB in the beginning and 206.6 MB in the end (delta: 38.8 MB). Free memory was 142.5 MB in the beginning and 115.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,629 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 167.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:52,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.97 ms. Allocated memory is still 167.8 MB. Free memory was 142.3 MB in the beginning and 130.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,630 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.54 ms. Allocated memory is still 167.8 MB. Free memory was 130.7 MB in the beginning and 128.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,631 INFO L168 Benchmark]: Boogie Preprocessor took 34.36 ms. Allocated memory is still 167.8 MB. Free memory was 128.9 MB in the beginning and 127.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,631 INFO L168 Benchmark]: RCFGBuilder took 512.65 ms. Allocated memory is still 167.8 MB. Free memory was 127.4 MB in the beginning and 139.1 MB in the end (delta: -11.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,632 INFO L168 Benchmark]: TraceAbstraction took 5315.89 ms. Allocated memory was 167.8 MB in the beginning and 206.6 MB in the end (delta: 38.8 MB). Free memory was 139.1 MB in the beginning and 118.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 60.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,633 INFO L168 Benchmark]: Witness Printer took 60.15 ms. Allocated memory is still 206.6 MB. Free memory was 118.3 MB in the beginning and 115.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:52,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 167.8 MB. Free memory is still 141.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 423.97 ms. Allocated memory is still 167.8 MB. Free memory was 142.3 MB in the beginning and 130.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 83.54 ms. Allocated memory is still 167.8 MB. Free memory was 130.7 MB in the beginning and 128.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.36 ms. Allocated memory is still 167.8 MB. Free memory was 128.9 MB in the beginning and 127.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 512.65 ms. Allocated memory is still 167.8 MB. Free memory was 127.4 MB in the beginning and 139.1 MB in the end (delta: -11.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5315.89 ms. Allocated memory was 167.8 MB in the beginning and 206.6 MB in the end (delta: 38.8 MB). Free memory was 139.1 MB in the beginning and 118.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 60.6 MB. Max. memory is 8.0 GB. * Witness Printer took 60.15 ms. Allocated memory is still 206.6 MB. Free memory was 118.3 MB in the beginning and 115.2 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: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L41] return strncpy(dest,src,n); [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 463 SDtfs, 1217 SDslu, 1428 SDs, 0 SdLazy, 1263 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 285 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 368 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 322 ConstructedInterpolants, 0 QuantifiedInterpolants, 34914 SizeOfPredicates, 9 NumberOfNonLiveVariables, 419 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/40 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 incorrect! Received shutdown request...