/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:04,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:04,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:04,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:04,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:04,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:04,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:04,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:04,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:04,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:04,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:04,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:10:04,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:10:04,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:10:04,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:10:04,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:10:04,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:10:04,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:10:04,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:10:04,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:10:04,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:10:04,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:10:04,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:10:04,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:10:04,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:10:04,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:10:04,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:10:04,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:10:04,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:04,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:04,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:04,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:04,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:04,591 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:04,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:04,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:04,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:04,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:04,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:04,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:04,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:04,595 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:04,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:04,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:04,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:04,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:04,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:04,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:04,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:04,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:04,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:04,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:04,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:04,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:04,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:05,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:05,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:05,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:05,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:05,100 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:05,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skippedu.c [2020-12-21 22:10:05,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6cf9f6d/5bf3cad5940c469b975f8f538991cc81/FLAG8f2f6de33 [2020-12-21 22:10:05,877 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:05,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skippedu.c [2020-12-21 22:10:05,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6cf9f6d/5bf3cad5940c469b975f8f538991cc81/FLAG8f2f6de33 [2020-12-21 22:10:06,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6cf9f6d/5bf3cad5940c469b975f8f538991cc81 [2020-12-21 22:10:06,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:06,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:06,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:06,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:06,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:06,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d84841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06, skipping insertion in model container [2020-12-21 22:10:06,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:06,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:06,447 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2020-12-21 22:10:06,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:06,509 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:06,536 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2020-12-21 22:10:06,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:06,588 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:06,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06 WrapperNode [2020-12-21 22:10:06,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:06,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:06,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:06,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:06,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:06,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:06,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:06,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:06,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... [2020-12-21 22:10:06,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:06,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:06,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:06,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:06,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:06,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:10:06,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:06,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:06,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:07,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:07,205 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 22:10:07,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:07 BoogieIcfgContainer [2020-12-21 22:10:07,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:07,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:07,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:07,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:07,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:06" (1/3) ... [2020-12-21 22:10:07,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b87509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:07, skipping insertion in model container [2020-12-21 22:10:07,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:06" (2/3) ... [2020-12-21 22:10:07,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b87509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:07, skipping insertion in model container [2020-12-21 22:10:07,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:07" (3/3) ... [2020-12-21 22:10:07,221 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-12-21 22:10:07,230 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:07,237 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:07,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:07,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:07,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:07,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:07,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:07,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:07,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:07,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:07,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-21 22:10:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:07,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:07,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:07,326 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2020-12-21 22:10:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:07,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90306162] [2020-12-21 22:10:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90306162] [2020-12-21 22:10:07,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:07,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:07,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170917118] [2020-12-21 22:10:07,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:07,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:07,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:07,579 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-21 22:10:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:07,599 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2020-12-21 22:10:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:07,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-21 22:10:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:07,611 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:10:07,611 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 22:10:07,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 22:10:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 22:10:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:10:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-21 22:10:07,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-12-21 22:10:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:07,655 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-21 22:10:07,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-21 22:10:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:10:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:07,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:07,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:07,657 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:07,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2020-12-21 22:10:07,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:07,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158346893] [2020-12-21 22:10:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:07,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158346893] [2020-12-21 22:10:07,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:07,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311771630] [2020-12-21 22:10:07,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:10:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:07,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:10:07,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:10:07,811 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2020-12-21 22:10:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:07,875 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-12-21 22:10:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:10:07,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 22:10:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:07,876 INFO L225 Difference]: With dead ends: 37 [2020-12-21 22:10:07,876 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 22:10:07,878 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 [2020-12-21 22:10:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 22:10:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-21 22:10:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:10:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 22:10:07,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2020-12-21 22:10:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:07,884 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 22:10:07,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:10:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 22:10:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:10:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:07,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:07,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:07,886 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2020-12-21 22:10:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:07,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830356085] [2020-12-21 22:10:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:08,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830356085] [2020-12-21 22:10:08,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116581599] [2020-12-21 22:10:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:08,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:08,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:10:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282568052] [2020-12-21 22:10:08,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:10:08,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:10:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:10:08,214 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-21 22:10:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:08,328 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-21 22:10:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:08,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-21 22:10:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:08,332 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:10:08,332 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 22:10:08,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:10:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 22:10:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-21 22:10:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:10:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-21 22:10:08,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-12-21 22:10:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:08,344 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-21 22:10:08,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:10:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-21 22:10:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:10:08,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:08,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:08,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:08,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2020-12-21 22:10:08,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:08,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500653504] [2020-12-21 22:10:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:08,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500653504] [2020-12-21 22:10:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:08,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:10:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219786544] [2020-12-21 22:10:08,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:10:08,852 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-21 22:10:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:08,941 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:10:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:10:08,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:10:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:08,944 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:10:08,944 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:10:08,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:10:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:10:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-21 22:10:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:10:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 22:10:08,960 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-21 22:10:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:08,961 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 22:10:08,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 22:10:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:10:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:08,964 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:08,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 22:10:08,964 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2020-12-21 22:10:08,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:08,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182534477] [2020-12-21 22:10:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:09,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182534477] [2020-12-21 22:10:09,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339221219] [2020-12-21 22:10:09,269 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 [2020-12-21 22:10:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:10:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:09,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-12-21 22:10:09,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:10:09,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:10:09,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:10:09,432 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-21 22:10:09,472 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-21 22:10:09,473 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-21 22:10:09,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:10:09,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:10:09,481 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:10:09,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:10:09,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:10:09,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:10:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:10:09,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:09,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-21 22:10:09,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355667069] [2020-12-21 22:10:09,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:09,577 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 14 states. [2020-12-21 22:10:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:10,310 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-12-21 22:10:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:10:10,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2020-12-21 22:10:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:10,314 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:10:10,314 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 22:10:10,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:10:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 22:10:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2020-12-21 22:10:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:10:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-21 22:10:10,340 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2020-12-21 22:10:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:10,340 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-21 22:10:10,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-21 22:10:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:10:10,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:10,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:10,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:10,558 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2020-12-21 22:10:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:10,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202207279] [2020-12-21 22:10:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 22:10:10,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 22:10:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 22:10:10,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 22:10:10,642 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 22:10:10,643 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 22:10:10,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 22:10:10,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:10:10 BoogieIcfgContainer [2020-12-21 22:10:10,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 22:10:10,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 22:10:10,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 22:10:10,689 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 22:10:10,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:07" (3/4) ... [2020-12-21 22:10:10,693 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-21 22:10:10,773 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-tiling/skippedu.c-witness.graphml [2020-12-21 22:10:10,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 22:10:10,775 INFO L168 Benchmark]: Toolchain (without parser) took 4534.38 ms. Allocated memory was 162.5 MB in the beginning and 198.2 MB in the end (delta: 35.7 MB). Free memory was 137.9 MB in the beginning and 177.9 MB in the end (delta: -40.0 MB). Peak memory consumption was 86.8 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,776 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 141.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 22:10:10,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.93 ms. Allocated memory is still 162.5 MB. Free memory was 137.5 MB in the beginning and 127.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.88 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 125.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,778 INFO L168 Benchmark]: Boogie Preprocessor took 33.55 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 124.9 MB in the end (delta: 935.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,779 INFO L168 Benchmark]: RCFGBuilder took 512.81 ms. Allocated memory is still 162.5 MB. Free memory was 124.9 MB in the beginning and 109.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,780 INFO L168 Benchmark]: TraceAbstraction took 3478.03 ms. Allocated memory is still 162.5 MB. Free memory was 108.6 MB in the beginning and 53.2 MB in the end (delta: 55.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,780 INFO L168 Benchmark]: Witness Printer took 84.85 ms. Allocated memory was 162.5 MB in the beginning and 198.2 MB in the end (delta: 35.7 MB). Free memory was 53.2 MB in the beginning and 177.9 MB in the end (delta: -124.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 22:10:10,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 141.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 346.93 ms. Allocated memory is still 162.5 MB. Free memory was 137.5 MB in the beginning and 127.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 66.88 ms. Allocated memory is still 162.5 MB. Free memory was 127.5 MB in the beginning and 125.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.55 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 124.9 MB in the end (delta: 935.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 512.81 ms. Allocated memory is still 162.5 MB. Free memory was 124.9 MB in the beginning and 109.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3478.03 ms. Allocated memory is still 162.5 MB. Free memory was 108.6 MB in the beginning and 53.2 MB in the end (delta: 55.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 8.0 GB. * Witness Printer took 84.85 ms. Allocated memory was 162.5 MB in the beginning and 198.2 MB in the end (delta: 35.7 MB). Free memory was 53.2 MB in the beginning and 177.9 MB in the end (delta: -124.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; VAL [MAX=100000, SIZE=0] [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) [L6] COND FALSE !(!cond) VAL [MAX=100000, SIZE=2] [L32] i = 1 VAL [MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] VAL [MAX=100000, SIZE=2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] VAL [MAX=100000, SIZE=2] [L38] COND TRUE a[2*i-1] > i [L40] a[2*i-1] = 2*i-1 VAL [MAX=100000, SIZE=2] [L32] i++ VAL [MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) VAL [MAX=100000, SIZE=2] [L44] i = 0 VAL [MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] a[i] [L8] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L8] reach_error() VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 235 SDslu, 113 SDs, 0 SdLazy, 281 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, 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, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 8488 SizeOfPredicates, 12 NumberOfNonLiveVariables, 185 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 12/16 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...