/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/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:22:10,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:22:10,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:22:10,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:22:10,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:22:10,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:22:10,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:22:10,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:22:10,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:22:10,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:22:10,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:22:10,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:22:10,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:22:10,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:22:10,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:22:10,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:22:10,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:22:10,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:22:10,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:22:10,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:22:10,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:22:10,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:22:10,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:22:10,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:22:10,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:22:10,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:22:10,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:22:10,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:22:10,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:22:10,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:22:10,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:22:10,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:22:10,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:22:10,224 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:22:10,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:22:10,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:22:10,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:22:10,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:22:10,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:22:10,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:22:10,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:22:10,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:22:10,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:22:10,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:22:10,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:22:10,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:22:10,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:22:10,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:22:10,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:22:10,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:22:10,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:22:10,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:22:10,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:22:10,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:22:10,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:22:10,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:22:10,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:22:10,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:22:10,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:22:10,799 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:22:10,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-1.i [2020-12-22 04:22:10,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f2a4178c/4ae5204558954f0ebef9f925a10df5fd/FLAGa840caeb9 [2020-12-22 04:22:11,637 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:22:11,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-1.i [2020-12-22 04:22:11,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f2a4178c/4ae5204558954f0ebef9f925a10df5fd/FLAGa840caeb9 [2020-12-22 04:22:11,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f2a4178c/4ae5204558954f0ebef9f925a10df5fd [2020-12-22 04:22:11,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:22:11,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:22:11,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:11,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:22:11,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:22:11,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:11" (1/1) ... [2020-12-22 04:22:11,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a151e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:11, skipping insertion in model container [2020-12-22 04:22:11,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:11" (1/1) ... [2020-12-22 04:22:12,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:22:12,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:22:12,201 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/loop-acceleration/array_3-1.i[849,862] [2020-12-22 04:22:12,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:12,230 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:22:12,246 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/loop-acceleration/array_3-1.i[849,862] [2020-12-22 04:22:12,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:12,272 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:22:12,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12 WrapperNode [2020-12-22 04:22:12,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:12,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:12,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:22:12,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:22:12,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:12,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:22:12,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:22:12,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:22:12,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (1/1) ... [2020-12-22 04:22:12,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:22:12,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:22:12,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:22:12,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:22:12,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (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 04:22:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:22:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:22:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:22:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:22:12,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:22:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:22:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:22:12,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:22:12,837 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:22:12,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:12 BoogieIcfgContainer [2020-12-22 04:22:12,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:22:12,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:22:12,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:22:12,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:22:12,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:22:11" (1/3) ... [2020-12-22 04:22:12,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660bfdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:12, skipping insertion in model container [2020-12-22 04:22:12,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:12" (2/3) ... [2020-12-22 04:22:12,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660bfdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:12, skipping insertion in model container [2020-12-22 04:22:12,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:12" (3/3) ... [2020-12-22 04:22:12,851 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-12-22 04:22:12,860 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:22:12,866 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:22:12,977 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:22:13,022 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:22:13,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:22:13,023 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:22:13,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:22:13,023 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:22:13,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:22:13,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:22:13,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:22:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 04:22:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:22:13,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:13,053 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash 212411183, now seen corresponding path program 1 times [2020-12-22 04:22:13,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:13,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233717346] [2020-12-22 04:22:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,307 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 04:22:13,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233717346] [2020-12-22 04:22:13,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:13,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:22:13,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564296547] [2020-12-22 04:22:13,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:22:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:22:13,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:22:13,366 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 04:22:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:13,397 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-22 04:22:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:22:13,402 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 04:22:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:13,412 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:22:13,412 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:22:13,415 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 04:22:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:22:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:22:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:22:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-22 04:22:13,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-12-22 04:22:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:13,455 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-22 04:22:13,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:22:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-22 04:22:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:22:13,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:13,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:22:13,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2018507400, now seen corresponding path program 1 times [2020-12-22 04:22:13,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:13,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638899245] [2020-12-22 04:22:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,533 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 04:22:13,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638899245] [2020-12-22 04:22:13,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:13,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:22:13,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447972948] [2020-12-22 04:22:13,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:22:13,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:13,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:22:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:13,545 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-22 04:22:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:13,631 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-22 04:22:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:22:13,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 04:22:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:13,634 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:22:13,634 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:22:13,636 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 04:22:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:22:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2020-12-22 04:22:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:22:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-22 04:22:13,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2020-12-22 04:22:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:13,648 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-22 04:22:13,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:22:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-22 04:22:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:22:13,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:13,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:22:13,650 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1562587830, now seen corresponding path program 1 times [2020-12-22 04:22:13,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:13,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687302430] [2020-12-22 04:22:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687302430] [2020-12-22 04:22:13,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353283136] [2020-12-22 04:22:13,754 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 04:22:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:22:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:13,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:13,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:22:13,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923119908] [2020-12-22 04:22:13,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:22:13,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:22:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:13,884 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-22 04:22:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:13,931 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-22 04:22:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:13,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 04:22:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:13,932 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:22:13,932 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:22:13,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:22:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-22 04:22:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:22:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-22 04:22:13,939 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2020-12-22 04:22:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:13,939 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-22 04:22:13,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:22:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-22 04:22:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:22:13,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:13,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:22:14,154 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1568667532, now seen corresponding path program 2 times [2020-12-22 04:22:14,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665868873] [2020-12-22 04:22:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:22:14,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665868873] [2020-12-22 04:22:14,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:14,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:22:14,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700062102] [2020-12-22 04:22:14,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:22:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:22:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:22:14,226 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-12-22 04:22:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,265 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-12-22 04:22:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:14,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 04:22:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,267 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:22:14,267 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:22:14,268 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 04:22:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:22:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:22:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:22:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 04:22:14,273 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2020-12-22 04:22:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,273 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 04:22:14,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:22:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 04:22:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:22:14,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:22:14,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1592576845, now seen corresponding path program 1 times [2020-12-22 04:22:14,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234692735] [2020-12-22 04:22:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:22:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234692735] [2020-12-22 04:22:14,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857292386] [2020-12-22 04:22:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:22:14,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 04:22:14,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:14,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 04:22:14,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95668428] [2020-12-22 04:22:14,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:22:14,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:22:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:14,452 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-22 04:22:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,546 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-22 04:22:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:22:14,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 04:22:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,548 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:22:14,548 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:22:14,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:22:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-22 04:22:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:22:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:22:14,557 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 17 [2020-12-22 04:22:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,557 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:22:14,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:22:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:22:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:22:14,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,559 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,774 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash -834386755, now seen corresponding path program 2 times [2020-12-22 04:22:14,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928612818] [2020-12-22 04:22:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 04:22:14,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928612818] [2020-12-22 04:22:14,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:14,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 04:22:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374505414] [2020-12-22 04:22:14,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:22:14,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:22:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:14,854 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-12-22 04:22:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,910 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 04:22:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:22:14,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-22 04:22:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,911 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:22:14,912 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:22:14,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:22:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:22:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:22:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:22:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:22:14,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-22 04:22:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,914 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:22:14,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:22:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:22:14,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:22:14,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 04:22:14,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:22:14,944 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:22:14,944 INFO L189 CegarLoopUtils]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-12-22 04:22:14,944 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-22 04:22:14,945 INFO L192 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2020-12-22 04:22:14,945 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:22:14,945 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:22:14,945 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:22:14,945 INFO L189 CegarLoopUtils]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2020-12-22 04:22:14,945 INFO L189 CegarLoopUtils]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2020-12-22 04:22:14,946 INFO L185 CegarLoopUtils]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= ULTIMATE.start_main_~i~0 1023) [2020-12-22 04:22:14,946 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-22 04:22:14,946 INFO L189 CegarLoopUtils]: For program point L28-5(lines 28 32) no Hoare annotation was computed. [2020-12-22 04:22:14,946 INFO L189 CegarLoopUtils]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-12-22 04:22:14,946 INFO L192 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2020-12-22 04:22:14,946 INFO L189 CegarLoopUtils]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2020-12-22 04:22:14,947 INFO L189 CegarLoopUtils]: For program point L20(lines 20 34) no Hoare annotation was computed. [2020-12-22 04:22:14,947 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-22 04:22:14,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:22:14 BoogieIcfgContainer [2020-12-22 04:22:14,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:22:14,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:22:14,973 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:22:14,973 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:22:14,974 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:12" (3/4) ... [2020-12-22 04:22:14,979 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:22:14,994 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-22 04:22:14,995 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:22:14,996 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 04:22:14,996 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:22:15,072 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/array_3-1.i-witness.graphml [2020-12-22 04:22:15,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:22:15,075 INFO L168 Benchmark]: Toolchain (without parser) took 3103.82 ms. Allocated memory is still 152.0 MB. Free memory was 128.4 MB in the beginning and 125.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,075 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:22:15,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.19 ms. Allocated memory is still 152.0 MB. Free memory was 128.3 MB in the beginning and 118.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,076 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.64 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,077 INFO L168 Benchmark]: Boogie Preprocessor took 31.38 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 116.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,078 INFO L168 Benchmark]: RCFGBuilder took 486.95 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 103.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,078 INFO L168 Benchmark]: TraceAbstraction took 2130.37 ms. Allocated memory is still 152.0 MB. Free memory was 103.0 MB in the beginning and 127.9 MB in the end (delta: -24.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:22:15,079 INFO L168 Benchmark]: Witness Printer took 99.67 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 125.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:22:15,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.19 ms. Allocated memory is still 152.0 MB. Free memory was 128.3 MB in the beginning and 118.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.64 ms. Allocated memory is still 152.0 MB. Free memory was 118.7 MB in the beginning and 117.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.38 ms. Allocated memory is still 152.0 MB. Free memory was 117.3 MB in the beginning and 116.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 486.95 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 103.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2130.37 ms. Allocated memory is still 152.0 MB. Free memory was 103.0 MB in the beginning and 127.9 MB in the end (delta: -24.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 99.67 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 125.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 56 SDslu, 67 SDs, 0 SdLazy, 126 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 5 HoareAnnotationTreeSize, 3 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 2607 SizeOfPredicates, 0 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 37/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...