/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/nla-digbench-scaling/ps6-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:10:04,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:10:04,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:10:04,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:10:04,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:10:04,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:10:04,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:10:04,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:10:04,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:10:04,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:10:04,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:10:04,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:10:04,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:10:04,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:10:04,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:10:04,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:10:04,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:10:04,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:10:04,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:10:04,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:10:04,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:10:04,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:10:04,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:10:04,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:10:04,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:10:04,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:10:04,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:10:04,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:10:04,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:10:04,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:10:04,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:10:04,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:10:04,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:10:04,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:10:04,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:10:04,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:10:04,437 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 08:10:04,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:10:04,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:10:04,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:10:04,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:10:04,468 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:10:04,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:10:04,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:10:04,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:10:04,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:10:04,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:10:04,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:10:04,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:10:04,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:10:04,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:10:04,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:10:04,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:10:04,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:10:04,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:10:04,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:10:04,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:10:04,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:10:04,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:10:04,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:10:04,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:10:04,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:10:04,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:10:04,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:10:04,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:10:04,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:10:04,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:10:04,991 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:10:04,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c [2020-12-23 08:10:05,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5428c046/bbdf0f863cb44c838b370db11958f9ed/FLAG9094ac4eb [2020-12-23 08:10:05,762 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:10:05,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c [2020-12-23 08:10:05,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5428c046/bbdf0f863cb44c838b370db11958f9ed/FLAG9094ac4eb [2020-12-23 08:10:06,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5428c046/bbdf0f863cb44c838b370db11958f9ed [2020-12-23 08:10:06,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:10:06,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:10:06,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:10:06,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:10:06,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:10:06,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbdc1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06, skipping insertion in model container [2020-12-23 08:10:06,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:10:06,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:10:06,464 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/nla-digbench-scaling/ps6-ll_unwindbound100.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:10:06,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:10:06,526 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:10:06,550 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/nla-digbench-scaling/ps6-ll_unwindbound100.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:10:06,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:10:06,594 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:10:06,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06 WrapperNode [2020-12-23 08:10:06,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:10:06,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:10:06,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:10:06,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:10:06,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:10:06,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:10:06,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:10:06,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:10:06,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (1/1) ... [2020-12-23 08:10:06,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:10:06,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:10:06,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:10:06,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:10:06,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (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 08:10:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:10:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:10:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:10:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:10:07,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:10:07,116 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:10:07,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:10:07 BoogieIcfgContainer [2020-12-23 08:10:07,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:10:07,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:10:07,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:10:07,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:10:07,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:10:06" (1/3) ... [2020-12-23 08:10:07,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643e609e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:10:07, skipping insertion in model container [2020-12-23 08:10:07,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:10:06" (2/3) ... [2020-12-23 08:10:07,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@643e609e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:10:07, skipping insertion in model container [2020-12-23 08:10:07,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:10:07" (3/3) ... [2020-12-23 08:10:07,138 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.c [2020-12-23 08:10:07,146 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:10:07,152 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:10:07,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:10:07,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:10:07,228 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:10:07,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:10:07,229 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:10:07,229 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:10:07,229 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:10:07,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:10:07,229 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:10:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 08:10:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:10:07,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:07,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:07,253 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-23 08:10:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:07,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955940361] [2020-12-23 08:10:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:10:07,446 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 08:10:07,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955940361] [2020-12-23 08:10:07,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:10:07,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:10:07,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496861013] [2020-12-23 08:10:07,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:10:07,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:10:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:10:07,475 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-23 08:10:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:07,496 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-23 08:10:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:10:07,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:10:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:07,508 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:10:07,508 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 08:10:07,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:10:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 08:10:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 08:10:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 08:10:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 08:10:07,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-23 08:10:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:07,555 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 08:10:07,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:10:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 08:10:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:10:07,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:07,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:07,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:10:07,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:07,559 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:10:07,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:07,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766368107] [2020-12-23 08:10:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:07,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:07,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069956170] [2020-12-23 08:10:07,581 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 08:10:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:10:07,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:10:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:07,772 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 08:10:07,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766368107] [2020-12-23 08:10:07,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:07,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069956170] [2020-12-23 08:10:07,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:10:07,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:10:07,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88703971] [2020-12-23 08:10:07,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:10:07,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:07,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:10:07,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:10:07,777 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-23 08:10:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:15,688 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-23 08:10:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:10:15,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 08:10:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:15,693 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:10:15,693 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 08:10:15,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:10:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 08:10:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 08:10:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:10:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 08:10:15,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-23 08:10:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:15,702 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 08:10:15,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:10:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 08:10:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 08:10:15,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:15,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:15,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:10:15,921 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-23 08:10:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:15,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056883622] [2020-12-23 08:10:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:15,940 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:15,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230051540] [2020-12-23 08:10:15,941 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 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 08:10:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:10:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:10:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:16,162 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 08:10:16,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056883622] [2020-12-23 08:10:16,163 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:16,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230051540] [2020-12-23 08:10:16,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:10:16,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:10:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272998118] [2020-12-23 08:10:16,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:10:16,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:10:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:10:16,171 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-23 08:10:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:19,148 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 08:10:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:10:19,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 08:10:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:19,150 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:10:19,150 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 08:10:19,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:10:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 08:10:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 08:10:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:10:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 08:10:19,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-23 08:10:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:19,161 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 08:10:19,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:10:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 08:10:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:10:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:19,163 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:19,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:10:19,378 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:19,380 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-23 08:10:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:19,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978301698] [2020-12-23 08:10:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:19,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:19,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139057157] [2020-12-23 08:10:19,397 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 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 08:10:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:10:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:10:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:10:19,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978301698] [2020-12-23 08:10:19,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:19,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139057157] [2020-12-23 08:10:19,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:10:19,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:10:19,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568923813] [2020-12-23 08:10:19,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:10:19,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:19,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:10:19,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:10:19,589 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-23 08:10:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:19,627 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 08:10:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:10:19,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 08:10:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:19,629 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:10:19,630 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:10:19,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:10:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:10:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:10:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:10:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 08:10:19,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-23 08:10:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:19,639 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 08:10:19,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:10:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 08:10:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:10:19,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:19,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:19,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:10:19,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-23 08:10:19,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:19,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486718433] [2020-12-23 08:10:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:19,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941073167] [2020-12-23 08:10:19,874 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 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 08:10:20,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:10:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:10:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 08:10:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:20,147 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 08:10:20,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486718433] [2020-12-23 08:10:20,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:20,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941073167] [2020-12-23 08:10:20,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:10:20,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:10:20,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475663818] [2020-12-23 08:10:20,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:10:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:20,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:10:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:10:20,154 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-12-23 08:10:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:22,880 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 08:10:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 08:10:22,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 08:10:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:22,882 INFO L225 Difference]: With dead ends: 49 [2020-12-23 08:10:22,882 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 08:10:22,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-23 08:10:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 08:10:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-23 08:10:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:10:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 08:10:22,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-23 08:10:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:22,892 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 08:10:22,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:10:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 08:10:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:10:22,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:22,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:23,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:10:23,102 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-23 08:10:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816488438] [2020-12-23 08:10:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:23,116 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:23,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771307923] [2020-12-23 08:10:23,117 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 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 08:10:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:10:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 08:10:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:23,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:10:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:10:23,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816488438] [2020-12-23 08:10:23,440 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:23,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771307923] [2020-12-23 08:10:23,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:10:23,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 08:10:23,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230731248] [2020-12-23 08:10:23,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 08:10:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:23,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 08:10:23,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:10:23,443 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-12-23 08:10:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:23,847 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 08:10:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:10:23,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 08:10:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:23,849 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:10:23,849 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 08:10:23,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-23 08:10:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 08:10:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 08:10:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:10:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 08:10:23,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-23 08:10:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:23,857 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 08:10:23,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 08:10:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 08:10:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 08:10:23,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:23,858 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:24,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 08:10:24,074 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-23 08:10:24,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:24,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81931699] [2020-12-23 08:10:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:24,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:24,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095006460] [2020-12-23 08:10:24,090 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 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 08:10:24,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:10:24,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:10:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 08:10:24,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:10:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:10:24,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81931699] [2020-12-23 08:10:24,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:10:24,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095006460] [2020-12-23 08:10:24,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:10:24,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 08:10:24,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842318732] [2020-12-23 08:10:24,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:10:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:10:24,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:10:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:10:24,222 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-23 08:10:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:10:24,274 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 08:10:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:10:24,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 08:10:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:10:24,276 INFO L225 Difference]: With dead ends: 38 [2020-12-23 08:10:24,276 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:10:24,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:10:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:10:24,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 08:10:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 08:10:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 08:10:24,283 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-23 08:10:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:10:24,283 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 08:10:24,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:10:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 08:10:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 08:10:24,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:10:24,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:10:24,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:10:24,500 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:10:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:10:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-23 08:10:24,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:10:24,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109615591] [2020-12-23 08:10:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:10:24,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:10:24,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132000001] [2020-12-23 08:10:24,515 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 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