/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-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:50:48,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:50:48,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:50:48,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:50:48,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:50:48,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:50:48,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:50:48,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:50:48,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:50:48,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:50:48,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:50:48,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:50:48,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:50:48,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:50:48,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:50:48,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:50:48,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:50:48,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:50:48,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:50:48,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:50:48,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:50:48,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:50:48,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:50:48,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:50:48,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:50:48,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:50:48,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:50:48,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:50:48,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:50:48,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:50:48,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:50:48,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:50:48,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:50:48,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:50:48,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:50:48,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:50:48,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:50:48,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:50:48,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:50:48,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:50:48,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:50:48,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:50:48,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:50:48,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:50:48,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:50:48,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:50:48,432 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:50:48,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:50:48,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:50:48,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:50:48,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:50:48,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:50:48,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:50:48,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:50:48,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:50:48,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:50:48,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:50:48,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:50:48,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:50:48,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:48,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:50:48,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:50:48,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:50:48,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:50:48,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:50:48,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:50:48,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:50:48,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:50:48,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:50:48,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:50:48,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:50:48,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:50:48,855 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:50:48,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/cggmp2005b.i [2021-01-06 16:50:48,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10a2d9412/43598c017a1545fbb067eddc4d0da1cd/FLAG7fb33195d [2021-01-06 16:50:49,565 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:50:49,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/cggmp2005b.i [2021-01-06 16:50:49,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10a2d9412/43598c017a1545fbb067eddc4d0da1cd/FLAG7fb33195d [2021-01-06 16:50:49,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10a2d9412/43598c017a1545fbb067eddc4d0da1cd [2021-01-06 16:50:49,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:50:49,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:50:49,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:49,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:50:49,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:50:49,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:49" (1/1) ... [2021-01-06 16:50:49,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623eb41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:49, skipping insertion in model container [2021-01-06 16:50:49,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:49" (1/1) ... [2021-01-06 16:50:49,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:50:49,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:50:50,111 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-lit/cggmp2005b.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:50:50,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:50,137 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:50:50,152 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-lit/cggmp2005b.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:50:50,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:50,174 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:50:50,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50 WrapperNode [2021-01-06 16:50:50,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:50,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:50,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:50:50,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:50:50,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:50,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:50:50,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:50:50,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:50:50,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (1/1) ... [2021-01-06 16:50:50,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:50:50,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:50:50,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:50:50,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:50:50,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (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 [2021-01-06 16:50:50,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:50:50,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:50:50,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:50:50,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:50:50,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:50:50,720 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:50:50,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:50 BoogieIcfgContainer [2021-01-06 16:50:50,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:50:50,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:50:50,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:50:50,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:50:50,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:50:49" (1/3) ... [2021-01-06 16:50:50,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32366e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:50, skipping insertion in model container [2021-01-06 16:50:50,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:50" (2/3) ... [2021-01-06 16:50:50,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32366e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:50, skipping insertion in model container [2021-01-06 16:50:50,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:50" (3/3) ... [2021-01-06 16:50:50,750 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2021-01-06 16:50:50,767 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:50:50,776 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:50:50,828 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:50:50,872 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:50:50,873 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:50:50,873 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:50:50,873 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:50:50,873 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:50:50,873 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:50:50,874 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:50:50,874 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:50:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 16:50:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:50:50,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:50,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:50:50,896 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash 890522599, now seen corresponding path program 1 times [2021-01-06 16:50:50,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:50,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995110142] [2021-01-06 16:50:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995110142] [2021-01-06 16:50:51,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:51,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:50:51,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666472737] [2021-01-06 16:50:51,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:50:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:50:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:50:51,153 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2021-01-06 16:50:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,186 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-01-06 16:50:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:50:51,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:50:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,210 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:50:51,210 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:50:51,218 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 [2021-01-06 16:50:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:50:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:50:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:50:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-01-06 16:50:51,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-01-06 16:50:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,263 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-01-06 16:50:51,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:50:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-01-06 16:50:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:50:51,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:50:51,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:50:51,266 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 889658660, now seen corresponding path program 1 times [2021-01-06 16:50:51,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:51,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561716633] [2021-01-06 16:50:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:51,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561716633] [2021-01-06 16:50:51,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:51,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:51,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129245319] [2021-01-06 16:50:51,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:51,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:51,389 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2021-01-06 16:50:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,415 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-01-06 16:50:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:51,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:50:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,419 INFO L225 Difference]: With dead ends: 15 [2021-01-06 16:50:51,419 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:50:51,421 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 [2021-01-06 16:50:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:50:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:50:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:50:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 16:50:51,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2021-01-06 16:50:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,429 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 16:50:51,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 16:50:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:50:51,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:51,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:50:51,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 385385298, now seen corresponding path program 1 times [2021-01-06 16:50:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:51,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995670321] [2021-01-06 16:50:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:51,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995670321] [2021-01-06 16:50:51,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:51,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:51,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321922222] [2021-01-06 16:50:51,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:51,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:51,554 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2021-01-06 16:50:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,581 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-01-06 16:50:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:51,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:50:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,584 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:50:51,584 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:50:51,584 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 [2021-01-06 16:50:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:50:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:50:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:50:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 16:50:51,589 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10 [2021-01-06 16:50:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,593 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 16:50:51,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 16:50:51,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:50:51,594 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:51,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:50:51,598 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1336595214, now seen corresponding path program 1 times [2021-01-06 16:50:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:51,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061599837] [2021-01-06 16:50:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:50:51,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061599837] [2021-01-06 16:50:51,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970994413] [2021-01-06 16:50:51,685 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 [2021-01-06 16:50:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:51,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:50:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:50:51,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:51,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:50:51,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989154873] [2021-01-06 16:50:51,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:50:51,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:50:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:50:51,834 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2021-01-06 16:50:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,853 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-01-06 16:50:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:50:51,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 16:50:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,854 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:50:51,854 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:50:51,855 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 [2021-01-06 16:50:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:50:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:50:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:50:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 16:50:51,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2021-01-06 16:50:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,860 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 16:50:51,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:50:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 16:50:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:50:51,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:52,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:52,076 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash 731591740, now seen corresponding path program 2 times [2021-01-06 16:50:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:52,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621187908] [2021-01-06 16:50:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621187908] [2021-01-06 16:50:52,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809515208] [2021-01-06 16:50:52,126 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 [2021-01-06 16:50:52,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:50:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:50:52,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:52,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 16:50:52,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675493587] [2021-01-06 16:50:52,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:50:52,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:50:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:50:52,250 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 8 states. [2021-01-06 16:50:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:52,317 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-01-06 16:50:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:50:52,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 16:50:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:52,319 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:50:52,319 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:50:52,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:50:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:50:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:50:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 16:50:52,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 15 [2021-01-06 16:50:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:52,325 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 16:50:52,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:50:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 16:50:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:50:52,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:52,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:52,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:52,541 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1580115456, now seen corresponding path program 3 times [2021-01-06 16:50:52,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:52,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157743998] [2021-01-06 16:50:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:50:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157743998] [2021-01-06 16:50:52,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:52,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:50:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353637480] [2021-01-06 16:50:52,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:50:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:50:52,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:50:52,595 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 16:50:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:52,613 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-01-06 16:50:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:50:52,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-01-06 16:50:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:52,614 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:50:52,614 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:50:52,614 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 [2021-01-06 16:50:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:50:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:50:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:50:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:50:52,615 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-01-06 16:50:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:52,616 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:50:52,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:50:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:50:52,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:50:52,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:50:52,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:50:52,666 INFO L185 CegarLoopUtils]: At program point L35-2(lines 35 37) the Hoare annotation is: (= ULTIMATE.start_main_~k~0 4) [2021-01-06 16:50:52,667 INFO L185 CegarLoopUtils]: At program point L35-3(lines 29 38) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~j~0 100) ULTIMATE.start_main_~i~0)) (= ULTIMATE.start_main_~k~0 4)) [2021-01-06 16:50:52,667 INFO L185 CegarLoopUtils]: At program point L31-2(lines 31 33) the Hoare annotation is: (or (<= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~k~0 4)) [2021-01-06 16:50:52,667 INFO L189 CegarLoopUtils]: For program point L31-3(lines 31 33) no Hoare annotation was computed. [2021-01-06 16:50:52,667 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-01-06 16:50:52,667 INFO L192 CegarLoopUtils]: At program point L40(lines 24 41) the Hoare annotation is: true [2021-01-06 16:50:52,667 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point L29-2(lines 29 38) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-01-06 16:50:52,668 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-01-06 16:50:52,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:50:52 BoogieIcfgContainer [2021-01-06 16:50:52,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:50:52,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:50:52,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:50:52,689 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:50:52,691 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:50" (3/4) ... [2021-01-06 16:50:52,694 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:50:52,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:50:52,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:50:52,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:50:52,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:50:52,745 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/cggmp2005b.i-witness.graphml [2021-01-06 16:50:52,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:50:52,748 INFO L168 Benchmark]: Toolchain (without parser) took 2848.42 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 76.0 MB in the end (delta: 51.1 MB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,748 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.4 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:50:52,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.84 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.56 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,750 INFO L168 Benchmark]: Boogie Preprocessor took 23.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.8 MB in the end (delta: 756.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,751 INFO L168 Benchmark]: RCFGBuilder took 491.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 103.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,751 INFO L168 Benchmark]: TraceAbstraction took 1955.47 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 78.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,752 INFO L168 Benchmark]: Witness Printer took 56.56 ms. Allocated memory is still 151.0 MB. Free memory was 78.6 MB in the beginning and 76.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:52,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.4 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.84 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.56 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.8 MB in the end (delta: 756.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 491.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 103.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1955.47 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 78.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. * Witness Printer took 56.56 ms. Allocated memory is still 151.0 MB. Free memory was 78.6 MB in the beginning and 76.0 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: 19]: 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: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (i == 0 && j + 100 <= i) || k == 4 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: i <= 1 || k == 4 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 5 SDslu, 81 SDs, 0 SdLazy, 34 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 16 NumberOfFragments, 25 HoareAnnotationTreeSize, 5 FomulaSimplifications, 43 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 1937 SizeOfPredicates, 1 NumberOfNonLiveVariables, 105 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 27/32 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...