/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:14:24,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:14:24,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:14:24,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:14:24,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:14:24,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:14:24,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:14:24,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:14:24,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:14:24,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:14:24,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:14:24,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:14:24,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:14:24,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:14:24,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:14:24,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:14:24,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:14:24,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:14:24,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:14:24,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:14:24,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:14:24,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:14:24,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:14:24,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:14:24,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:14:24,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:14:24,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:14:24,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:14:24,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:14:24,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:14:24,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:14:24,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:14:24,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:14:24,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:14:24,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:14:24,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:14:24,565 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 08:14:24,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:14:24,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:14:24,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:14:24,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:14:24,650 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:14:24,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:14:24,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:14:24,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:14:24,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:14:24,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:14:24,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:14:24,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:14:24,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:14:24,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:14:24,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:14:24,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:14:24,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:14:24,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:14:24,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:14:24,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:14:24,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:14:24,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:14:24,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:14:24,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:14:24,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:14:24,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:14:25,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:14:25,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:14:25,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:14:25,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:14:25,106 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:14:25,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2020-12-23 08:14:25,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/640b3b604/2ad4f48738304c89a5eb6116e855ed3d/FLAG5fe172ccf [2020-12-23 08:14:25,668 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:14:25,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2020-12-23 08:14:25,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/640b3b604/2ad4f48738304c89a5eb6116e855ed3d/FLAG5fe172ccf [2020-12-23 08:14:26,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/640b3b604/2ad4f48738304c89a5eb6116e855ed3d [2020-12-23 08:14:26,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:14:26,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:14:26,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:14:26,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:14:26,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:14:26,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c40481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26, skipping insertion in model container [2020-12-23 08:14:26,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:14:26,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:14:26,275 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_valuebound5.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 08:14:26,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:14:26,309 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:14:26,334 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_valuebound5.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 08:14:26,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:14:26,376 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:14:26,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26 WrapperNode [2020-12-23 08:14:26,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:14:26,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:14:26,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:14:26,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:14:26,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:14:26,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:14:26,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:14:26,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:14:26,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (1/1) ... [2020-12-23 08:14:26,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:14:26,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:14:26,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:14:26,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:14:26,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (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 08:14:26,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:14:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:14:26,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:14:26,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:14:27,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:14:27,111 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 08:14:27,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:14:27 BoogieIcfgContainer [2020-12-23 08:14:27,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:14:27,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:14:27,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:14:27,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:14:27,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:14:26" (1/3) ... [2020-12-23 08:14:27,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f59007d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:14:27, skipping insertion in model container [2020-12-23 08:14:27,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:14:26" (2/3) ... [2020-12-23 08:14:27,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f59007d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:14:27, skipping insertion in model container [2020-12-23 08:14:27,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:14:27" (3/3) ... [2020-12-23 08:14:27,139 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2020-12-23 08:14:27,152 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:14:27,165 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:14:27,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:14:27,225 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:14:27,226 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:14:27,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:14:27,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:14:27,226 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:14:27,226 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:14:27,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:14:27,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:14:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 08:14:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:14:27,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:27,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:14:27,257 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-23 08:14:27,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861109780] [2020-12-23 08:14:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:27,489 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 08:14:27,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861109780] [2020-12-23 08:14:27,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:14:27,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:14:27,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033932789] [2020-12-23 08:14:27,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:14:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:14:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:14:27,520 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-23 08:14:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:14:27,542 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-23 08:14:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:14:27,544 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 08:14:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:14:27,557 INFO L225 Difference]: With dead ends: 43 [2020-12-23 08:14:27,557 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 08:14:27,563 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 08:14:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 08:14:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 08:14:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 08:14:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 08:14:27,603 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2020-12-23 08:14:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:14:27,606 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 08:14:27,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:14:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 08:14:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:14:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:14:27,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:14:27,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:14:27,608 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:14:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:14:27,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-23 08:14:27,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:14:27,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908403176] [2020-12-23 08:14:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:14:27,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:14:27,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925348836] [2020-12-23 08:14:27,628 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 08:14:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:14:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:14:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:14:27,827 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 08:14:27,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908403176] [2020-12-23 08:14:27,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:14:27,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925348836] [2020-12-23 08:14:27,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:14:27,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:14:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334086120] [2020-12-23 08:14:27,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:14:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:14:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:14:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:14:27,832 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-23 08:16:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:08,222 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-23 08:16:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:16:08,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 08:16:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:08,225 INFO L225 Difference]: With dead ends: 33 [2020-12-23 08:16:08,225 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 08:16:08,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 08:16:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 08:16:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 08:16:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 08:16:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 08:16:08,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2020-12-23 08:16:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:08,235 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 08:16:08,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:16:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 08:16:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 08:16:08,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:08,236 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:08,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:16:08,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:08,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2020-12-23 08:16:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:08,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742848606] [2020-12-23 08:16:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:08,470 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:08,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205722716] [2020-12-23 08:16:08,471 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 08:16:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:16:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:16:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:08,589 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 08:16:08,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742848606] [2020-12-23 08:16:08,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:08,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205722716] [2020-12-23 08:16:08,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:08,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:16:08,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895657648] [2020-12-23 08:16:08,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:16:08,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:16:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:16:08,592 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-12-23 08:16:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:10,983 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 08:16:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:16:10,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 08:16:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:10,985 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:16:10,985 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 08:16:10,986 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 08:16:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 08:16:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-23 08:16:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 08:16:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 08:16:10,993 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2020-12-23 08:16:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:10,994 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 08:16:10,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:16:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 08:16:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:16:10,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:10,995 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:11,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:11,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2020-12-23 08:16:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244834499] [2020-12-23 08:16:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:11,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:11,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637767319] [2020-12-23 08:16:11,228 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 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 08:16:11,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:16:11,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:16:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 08:16:11,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:16:11,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244834499] [2020-12-23 08:16:11,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:11,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637767319] [2020-12-23 08:16:11,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:11,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 08:16:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667618375] [2020-12-23 08:16:11,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 08:16:11,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 08:16:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 08:16:11,451 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2020-12-23 08:16:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:11,581 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 08:16:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:16:11,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 08:16:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:11,586 INFO L225 Difference]: With dead ends: 45 [2020-12-23 08:16:11,586 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 08:16:11,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:16:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 08:16:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-23 08:16:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:16:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 08:16:11,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2020-12-23 08:16:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:11,604 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 08:16:11,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 08:16:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 08:16:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 08:16:11,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:11,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:11,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:11,816 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2020-12-23 08:16:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:11,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529460882] [2020-12-23 08:16:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:11,832 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:11,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580122469] [2020-12-23 08:16:11,833 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 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 08:16:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:16:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 08:16:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:16:12,110 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:16:12,128 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 08:16:12,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529460882] [2020-12-23 08:16:12,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:16:12,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580122469] [2020-12-23 08:16:12,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:16:12,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:16:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536610632] [2020-12-23 08:16:12,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:16:12,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:16:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:16:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:16:12,138 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-12-23 08:16:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:16:12,379 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 08:16:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:16:12,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 08:16:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:16:12,381 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:16:12,381 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:16:12,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:16:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:16:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 08:16:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 08:16:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 08:16:12,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-12-23 08:16:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:16:12,388 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 08:16:12,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:16:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 08:16:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 08:16:12,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:16:12,389 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:16:12,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:16:12,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:16:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:16:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2020-12-23 08:16:12,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:16:12,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861839346] [2020-12-23 08:16:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:16:12,620 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:16:12,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252273367] [2020-12-23 08:16:12,621 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 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