/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/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:52:14,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:52:14,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:52:14,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:52:14,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:52:14,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:52:14,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:52:14,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:52:14,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:52:14,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:52:14,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:52:14,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:52:14,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:52:14,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:52:14,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:52:14,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:52:14,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:52:14,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:52:14,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:52:14,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:52:14,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:52:14,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:52:14,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:52:14,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:52:14,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:52:14,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:52:14,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:52:14,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:52:14,323 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:52:14,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:52:14,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:52:14,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:52:14,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:52:14,353 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:52:14,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:52:14,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:52:14,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:52:14,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:52:14,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:52:14,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:52:14,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:52:14,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:52:14,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:52:14,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:52:14,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:52:14,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:52:14,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:14,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:52:14,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:52:14,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:52:14,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:52:14,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:52:14,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:52:14,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:52:14,357 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:52:14,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:52:14,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:52:14,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:52:14,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:52:14,782 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:52:14,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2020-12-23 06:52:14,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5afaaeab4/1e7051e6082b4584b15680b5c717f50e/FLAGee2be9fae [2020-12-23 06:52:15,528 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:52:15,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2020-12-23 06:52:15,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5afaaeab4/1e7051e6082b4584b15680b5c717f50e/FLAGee2be9fae [2020-12-23 06:52:15,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5afaaeab4/1e7051e6082b4584b15680b5c717f50e [2020-12-23 06:52:15,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:52:15,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:52:15,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:15,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:52:15,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:52:15,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:15" (1/1) ... [2020-12-23 06:52:15,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f27da12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:15, skipping insertion in model container [2020-12-23 06:52:15,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:15" (1/1) ... [2020-12-23 06:52:15,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:52:15,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:52:16,103 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2020-12-23 06:52:16,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:16,126 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:52:16,140 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2020-12-23 06:52:16,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:16,159 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:52:16,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16 WrapperNode [2020-12-23 06:52:16,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:16,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:16,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:52:16,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:52:16,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:16,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:52:16,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:52:16,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:52:16,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... [2020-12-23 06:52:16,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:52:16,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:52:16,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:52:16,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:52:16,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:52:16,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:52:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:52:16,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:52:16,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:52:16,652 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:52:16,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:16 BoogieIcfgContainer [2020-12-23 06:52:16,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:52:16,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:52:16,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:52:16,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:52:16,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:52:15" (1/3) ... [2020-12-23 06:52:16,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c78d8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:16, skipping insertion in model container [2020-12-23 06:52:16,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:16" (2/3) ... [2020-12-23 06:52:16,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c78d8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:16, skipping insertion in model container [2020-12-23 06:52:16,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:16" (3/3) ... [2020-12-23 06:52:16,671 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2020-12-23 06:52:16,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:52:16,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:52:16,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:52:16,751 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:52:16,751 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:52:16,751 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:52:16,752 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:52:16,752 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:52:16,752 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:52:16,752 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:52:16,752 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:52:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:52:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:52:16,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:16,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:52:16,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:52:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:16,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339513590] [2020-12-23 06:52:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339513590] [2020-12-23 06:52:17,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:17,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:52:17,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700183422] [2020-12-23 06:52:17,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:52:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:52:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:17,203 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-23 06:52:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:17,229 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-23 06:52:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:52:17,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:52:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:17,242 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:52:17,242 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:52:17,245 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 [2020-12-23 06:52:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:52:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:52:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:52:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:52:17,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:52:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:17,282 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:52:17,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:52:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:52:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:52:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:17,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:17,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:52:17,284 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:52:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534416457] [2020-12-23 06:52:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:17,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534416457] [2020-12-23 06:52:17,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075237658] [2020-12-23 06:52:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:52:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:17,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:17,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:52:17,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474469004] [2020-12-23 06:52:17,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:52:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:52:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:17,518 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-23 06:52:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:17,544 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-23 06:52:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:52:17,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:52:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:17,545 INFO L225 Difference]: With dead ends: 13 [2020-12-23 06:52:17,546 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:52:17,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:52:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:52:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:52:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:52:17,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:52:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:17,555 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:52:17,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:52:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:52:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:52:17,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:17,558 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:17,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:52:17,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-23 06:52:17,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:17,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787258004] [2020-12-23 06:52:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:17,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787258004] [2020-12-23 06:52:17,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648177091] [2020-12-23 06:52:17,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:52:17,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:52:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:18,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:18,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:52:18,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652623562] [2020-12-23 06:52:18,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:52:18,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:18,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:52:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:18,052 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-23 06:52:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:18,072 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-23 06:52:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:52:18,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 06:52:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:18,074 INFO L225 Difference]: With dead ends: 14 [2020-12-23 06:52:18,074 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:52:18,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:52:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:52:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:52:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:52:18,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 06:52:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:18,078 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:52:18,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:52:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:52:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:52:18,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:18,079 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:18,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:18,293 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-23 06:52:18,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:18,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574268191] [2020-12-23 06:52:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574268191] [2020-12-23 06:52:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243266779] [2020-12-23 06:52:18,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:18,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:52:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:52:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:18,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:18,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:52:18,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050769053] [2020-12-23 06:52:18,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:52:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:52:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:18,537 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-23 06:52:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:18,562 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:52:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:52:18,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 06:52:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:18,563 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:52:18,563 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:52:18,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:52:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-23 06:52:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:52:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:52:18,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-23 06:52:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:18,568 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:52:18,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:52:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:52:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:52:18,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:18,569 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:18,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:18,783 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-23 06:52:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:18,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337766125] [2020-12-23 06:52:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337766125] [2020-12-23 06:52:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618841341] [2020-12-23 06:52:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:18,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:18,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:52:18,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:18,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:18,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:52:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229578848] [2020-12-23 06:52:18,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:52:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:18,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:52:18,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:18,989 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-23 06:52:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:19,024 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:52:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:52:19,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 06:52:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:19,026 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:52:19,027 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:52:19,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:52:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:52:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:52:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-23 06:52:19,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-23 06:52:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:19,032 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-23 06:52:19,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:52:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-23 06:52:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:52:19,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:19,033 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:19,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:19,248 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-23 06:52:19,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:19,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615256831] [2020-12-23 06:52:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615256831] [2020-12-23 06:52:19,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614489255] [2020-12-23 06:52:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:19,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:52:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:52:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:19,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:19,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:52:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279269284] [2020-12-23 06:52:19,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:52:19,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:19,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:52:19,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:19,525 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-23 06:52:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:19,563 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-23 06:52:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:52:19,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 06:52:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:19,565 INFO L225 Difference]: With dead ends: 17 [2020-12-23 06:52:19,565 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:52:19,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:52:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:52:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:52:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:52:19,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-23 06:52:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:19,570 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:52:19,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:52:19,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:52:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:52:19,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:19,571 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:19,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:52:19,785 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-23 06:52:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:19,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9189598] [2020-12-23 06:52:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9189598] [2020-12-23 06:52:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899043546] [2020-12-23 06:52:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:20,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:52:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:52:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:20,340 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:52:20,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:52:20,712 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:52:20,837 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 06:52:21,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:21,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:52:22,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:52:22,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:52:24,832 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 92 [2020-12-23 06:52:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:25,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:25,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 06:52:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895278376] [2020-12-23 06:52:25,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:52:25,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:52:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:25,020 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2020-12-23 06:52:25,747 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-12-23 06:52:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:27,872 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-23 06:52:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:52:27,873 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-23 06:52:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:27,873 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:52:27,873 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:52:27,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:52:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:52:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:52:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:52:27,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-23 06:52:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:27,878 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:52:27,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:52:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:52:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:52:27,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:27,879 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:28,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:28,081 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 7 times [2020-12-23 06:52:28,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:28,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920028509] [2020-12-23 06:52:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:52:28,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920028509] [2020-12-23 06:52:28,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482463716] [2020-12-23 06:52:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:52:28,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:52:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:52:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48396786] [2020-12-23 06:52:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:52:28,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:52:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:28,430 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-12-23 06:52:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:28,492 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:52:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:52:28,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 06:52:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:28,494 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:52:28,494 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:52:28,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:52:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:52:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:52:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:52:28,496 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-12-23 06:52:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:28,497 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:52:28,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:52:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:52:28,497 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:52:28,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:28,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:52:28,949 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-12-23 06:52:28,955 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:52:28,955 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 06:52:28,959 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:52:28,960 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:52:28,960 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:52:28,962 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-23 06:52:28,963 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~y~0 1))) (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 1)) (and (<= 3 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 8) (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 178956971) 178956968) 536870912))) (<= ULTIMATE.start_main_~x~0 3)) (and (<= 1 (+ (* 3 (div (+ (* ULTIMATE.start_main_~y~0 (- 89478485)) 89478484) 268435456)) ULTIMATE.start_main_~y~0)) (<= 2 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 2) (<= ULTIMATE.start_main_~y~0 4)) (and (<= 4 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 4) (<= ULTIMATE.start_main_~y~0 16) (<= 1 (+ (* 3 (div (+ (* ULTIMATE.start_main_~y~0 (- 357913941)) 357913936) 1073741824)) ULTIMATE.start_main_~y~0))) (and (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 715827883) 715827872) 2147483648))) (<= ULTIMATE.start_main_~y~0 32) (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) (and (= ULTIMATE.start_main_~x~0 1) (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 44739243) 44739242) 134217728))) (<= ULTIMATE.start_main_~y~0 2)) (let ((.cse1 (div (* ULTIMATE.start_main_~y~0 (- 1)) (- 2)))) (and (<= ULTIMATE.start_main_~x~0 6) (<= 6 ULTIMATE.start_main_~x~0) (<= (+ .cse1 1) (* 3 (div (+ (* .cse1 715827883) 715827872) 2147483648))) (= 0 (mod ULTIMATE.start_main_~y~0 (- 2))) (<= .cse1 32))))) [2020-12-23 06:52:28,963 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2020-12-23 06:52:28,963 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-23 06:52:28,963 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2020-12-23 06:52:29,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:52:29 BoogieIcfgContainer [2020-12-23 06:52:29,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:52:29,007 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:52:29,007 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:52:29,007 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:52:29,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:16" (3/4) ... [2020-12-23 06:52:29,011 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:52:29,022 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:52:29,022 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:52:29,022 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:29,022 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:29,056 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/underapprox_1-2.c-witness.graphml [2020-12-23 06:52:29,056 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:52:29,057 INFO L168 Benchmark]: Toolchain (without parser) took 13137.53 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 128.2 MB in the beginning and 202.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,058 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:52:29,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.12 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 118.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,059 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.33 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,060 INFO L168 Benchmark]: Boogie Preprocessor took 52.63 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 115.8 MB in the end (delta: 900.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,063 INFO L168 Benchmark]: RCFGBuilder took 390.25 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 104.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,064 INFO L168 Benchmark]: TraceAbstraction took 12346.83 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 104.4 MB in the beginning and 205.0 MB in the end (delta: -100.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,064 INFO L168 Benchmark]: Witness Printer took 49.14 ms. Allocated memory is still 267.4 MB. Free memory was 205.0 MB in the beginning and 202.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:29,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.12 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 118.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.33 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.63 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 115.8 MB in the end (delta: 900.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 390.25 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 104.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12346.83 ms. Allocated memory was 153.1 MB in the beginning and 267.4 MB in the end (delta: 114.3 MB). Free memory was 104.4 MB in the beginning and 205.0 MB in the end (delta: -100.6 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * Witness Printer took 49.14 ms. Allocated memory is still 267.4 MB. Free memory was 205.0 MB in the beginning and 202.9 MB in the end (delta: 2.1 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: 7]: 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: 16]: Loop Invariant Derived loop invariant: ((((((x == 0 && y == 1) || (((3 <= x && y <= 8) && y + 1 <= 3 * ((y * 178956971 + 178956968) / 536870912)) && x <= 3)) || (((1 <= 3 * ((y * -89478485 + 89478484) / 268435456) + y && 2 <= x) && x <= 2) && y <= 4)) || (((4 <= x && x <= 4) && y <= 16) && 1 <= 3 * ((y * -357913941 + 357913936) / 1073741824) + y)) || (((y + 1 <= 3 * ((y * 715827883 + 715827872) / 2147483648) && y <= 32) && 5 <= x) && x <= 5)) || ((x == 1 && y + 1 <= 3 * ((y * 44739243 + 44739242) / 134217728)) && y <= 2)) || ((((x <= 6 && 6 <= x) && y * -1 / -2 + 1 <= 3 * ((y * -1 / -2 * 715827883 + 715827872) / 2147483648)) && 0 == y % -2) && y * -1 / -2 <= 32) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 2 SDslu, 127 SDs, 0 SdLazy, 260 SolverSat, 22 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=7, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 161 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 133 ConstructedInterpolants, 1 QuantifiedInterpolants, 9810 SizeOfPredicates, 8 NumberOfNonLiveVariables, 446 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 30/184 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...