/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/divbin_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:28:26,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:28:26,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:28:26,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:28:26,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:28:26,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:28:26,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:28:26,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:28:26,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:28:26,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:28:26,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:28:26,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:28:26,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:28:26,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:28:26,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:28:26,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:28:26,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:28:26,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:28:26,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:28:26,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:28:26,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:28:26,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:28:26,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:28:26,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:28:26,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:28:26,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:28:26,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:28:26,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:28:26,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:28:26,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:28:26,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:28:26,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:28:26,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:28:26,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:28:26,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:28:26,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:28:26,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:28:26,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:28:26,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:28:26,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:28:26,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:28:26,428 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:28:26,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:28:26,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:28:26,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:28:26,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:28:26,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:28:26,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:28:26,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:28:26,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:28:26,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:28:26,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:28:26,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:28:26,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:28:26,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:28:26,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:28:26,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:28:26,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:28:26,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:28:26,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:28:26,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:28:26,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:28:26,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:28:26,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:28:26,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:28:26,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:28:26,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:28:26,890 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:28:26,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-01-06 17:28:26,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5114c8090/70f68958218442c7b614a5c2c6add1e9/FLAG695e5242f [2021-01-06 17:28:27,684 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:28:27,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2021-01-06 17:28:27,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5114c8090/70f68958218442c7b614a5c2c6add1e9/FLAG695e5242f [2021-01-06 17:28:28,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5114c8090/70f68958218442c7b614a5c2c6add1e9 [2021-01-06 17:28:28,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:28:28,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:28:28,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:28,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:28:28,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:28:28,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d57f791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28, skipping insertion in model container [2021-01-06 17:28:28,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:28:28,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:28:28,254 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/divbin_unwindbound5.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:28,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:28,292 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:28:28,308 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/divbin_unwindbound5.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:28,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:28,338 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:28:28,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28 WrapperNode [2021-01-06 17:28:28,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:28,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:28,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:28:28,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:28:28,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:28,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:28:28,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:28:28,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:28:28,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... [2021-01-06 17:28:28,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:28:28,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:28:28,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:28:28,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:28:28,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:28:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:28:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:28:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:28:28,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:28:28,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:28:28,961 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 17:28:28,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:28 BoogieIcfgContainer [2021-01-06 17:28:28,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:28:28,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:28:28,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:28:28,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:28:28,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:28:28" (1/3) ... [2021-01-06 17:28:28,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7131083e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:28, skipping insertion in model container [2021-01-06 17:28:28,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:28" (2/3) ... [2021-01-06 17:28:28,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7131083e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:28, skipping insertion in model container [2021-01-06 17:28:28,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:28" (3/3) ... [2021-01-06 17:28:28,973 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2021-01-06 17:28:28,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:28:29,001 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:28:29,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:28:29,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:28:29,071 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:28:29,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:28:29,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:28:29,074 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:28:29,074 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:28:29,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:28:29,075 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:28:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 17:28:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:28:29,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:29,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:29,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-01-06 17:28:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:29,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675815234] [2021-01-06 17:28:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675815234] [2021-01-06 17:28:29,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:29,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:28:29,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886106718] [2021-01-06 17:28:29,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:28:29,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:28:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:28:29,389 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 17:28:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:29,418 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-01-06 17:28:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:28:29,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:28:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:29,435 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:28:29,435 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:28:29,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:28:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:28:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:28:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:28:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 17:28:29,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-01-06 17:28:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:29,478 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 17:28:29,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:28:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 17:28:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:28:29,479 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:29,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:29,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:28:29,480 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-01-06 17:28:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:29,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384555970] [2021-01-06 17:28:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:29,501 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:29,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306700515] [2021-01-06 17:28:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:28:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:29,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384555970] [2021-01-06 17:28:29,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:29,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306700515] [2021-01-06 17:28:29,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:29,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:28:29,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960892345] [2021-01-06 17:28:29,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:28:29,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:28:29,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:28:29,690 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2021-01-06 17:28:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:29,734 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-01-06 17:28:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:28:29,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 17:28:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:29,736 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:28:29,736 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:28:29,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:28:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:28:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 17:28:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:28:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-01-06 17:28:29,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-01-06 17:28:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:29,744 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-01-06 17:28:29,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:28:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-01-06 17:28:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:28:29,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:29,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:29,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:28:29,961 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-01-06 17:28:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:29,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800868272] [2021-01-06 17:28:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:29,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:29,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485898178] [2021-01-06 17:28:29,982 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 [2021-01-06 17:28:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:30,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:28:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:30,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800868272] [2021-01-06 17:28:30,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:30,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485898178] [2021-01-06 17:28:30,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:30,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:28:30,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473913784] [2021-01-06 17:28:30,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:28:30,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:28:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:28:30,410 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2021-01-06 17:28:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:30,704 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-01-06 17:28:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:28:30,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-01-06 17:28:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:30,706 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:28:30,706 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:28:30,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:28:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:28:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 17:28:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:28:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-01-06 17:28:30,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2021-01-06 17:28:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:30,714 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-01-06 17:28:30,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:28:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-01-06 17:28:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:28:30,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:30,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:30,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:30,930 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2021-01-06 17:28:30,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:30,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33657521] [2021-01-06 17:28:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:30,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:30,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952283176] [2021-01-06 17:28:30,951 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 [2021-01-06 17:28:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:28:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:31,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33657521] [2021-01-06 17:28:31,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:31,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952283176] [2021-01-06 17:28:31,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:31,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:28:31,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440270611] [2021-01-06 17:28:31,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:28:31,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:28:31,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:28:31,073 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2021-01-06 17:28:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:31,123 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-01-06 17:28:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:28:31,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:28:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:31,127 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:28:31,127 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:28:31,129 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 [2021-01-06 17:28:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:28:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 17:28:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:28:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:28:31,143 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2021-01-06 17:28:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:31,144 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:28:31,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:28:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:28:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:28:31,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:31,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:31,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:31,362 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2021-01-06 17:28:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:31,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332508759] [2021-01-06 17:28:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:31,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:31,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358709679] [2021-01-06 17:28:31,408 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 [2021-01-06 17:28:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:28:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332508759] [2021-01-06 17:28:31,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:31,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358709679] [2021-01-06 17:28:31,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:31,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:28:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802633498] [2021-01-06 17:28:31,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:28:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:28:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:28:31,863 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 10 states. [2021-01-06 17:28:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:32,909 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-01-06 17:28:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:28:32,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2021-01-06 17:28:32,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:32,911 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:28:32,911 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:28:32,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:28:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:28:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-01-06 17:28:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:28:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:28:32,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2021-01-06 17:28:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:32,919 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:28:32,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:28:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:28:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:28:32,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:32,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:33,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:33,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:33,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:33,126 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2021-01-06 17:28:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:33,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495673609] [2021-01-06 17:28:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:33,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811568130] [2021-01-06 17:28:33,155 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 [2021-01-06 17:28:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:28:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:33,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495673609] [2021-01-06 17:28:33,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:33,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811568130] [2021-01-06 17:28:33,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:33,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:28:33,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101950531] [2021-01-06 17:28:33,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:28:33,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:28:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:28:33,275 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2021-01-06 17:28:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:33,307 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-01-06 17:28:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:28:33,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-01-06 17:28:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:33,322 INFO L225 Difference]: With dead ends: 50 [2021-01-06 17:28:33,325 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:28:33,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:28:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:28:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:28:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:28:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 17:28:33,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-01-06 17:28:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 17:28:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:28:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 17:28:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:28:33,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:33,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:33,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:28:33,541 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2021-01-06 17:28:33,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:33,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589139423] [2021-01-06 17:28:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:33,560 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:33,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100388628] [2021-01-06 17:28:33,561 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 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 [2021-01-06 17:28:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:33,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:28:33,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:28:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589139423] [2021-01-06 17:28:33,804 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100388628] [2021-01-06 17:28:33,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:33,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:28:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271015148] [2021-01-06 17:28:33,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:28:33,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:28:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:28:33,807 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2021-01-06 17:28:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:33,961 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-01-06 17:28:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:28:33,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 17:28:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:33,963 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:28:33,963 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:28:33,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:28:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:28:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-01-06 17:28:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 17:28:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 17:28:33,969 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2021-01-06 17:28:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:33,970 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 17:28:33,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:28:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 17:28:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:28:33,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:33,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:34,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:34,175 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2021-01-06 17:28:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:34,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827823278] [2021-01-06 17:28:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:34,207 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:34,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20166553] [2021-01-06 17:28:34,208 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 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 [2021-01-06 17:28:34,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:28:34,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:28:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:28:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:34,932 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:35,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827823278] [2021-01-06 17:28:35,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20166553] [2021-01-06 17:28:35,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:35,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:28:35,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891790008] [2021-01-06 17:28:35,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:28:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:28:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:28:35,023 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2021-01-06 17:28:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:35,361 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-01-06 17:28:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:28:35,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 17:28:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:35,363 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:28:35,364 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:28:35,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:28:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:28:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 17:28:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:28:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-01-06 17:28:35,373 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2021-01-06 17:28:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:35,373 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-01-06 17:28:35,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:28:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-01-06 17:28:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:28:35,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:35,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:35,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:35,579 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash 346519601, now seen corresponding path program 1 times [2021-01-06 17:28:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:35,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610532891] [2021-01-06 17:28:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:35,606 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:35,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394478306] [2021-01-06 17:28:35,607 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:28:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:28:35,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610532891] [2021-01-06 17:28:35,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:35,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394478306] [2021-01-06 17:28:35,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:35,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:28:35,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620326426] [2021-01-06 17:28:35,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:28:35,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:35,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:28:35,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:28:35,745 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2021-01-06 17:28:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:35,783 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-01-06 17:28:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:28:35,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-01-06 17:28:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:35,784 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:28:35,785 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:28:35,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:28:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:28:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 17:28:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:28:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-01-06 17:28:35,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2021-01-06 17:28:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:35,791 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-01-06 17:28:35,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:28:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-01-06 17:28:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:28:35,792 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:35,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:36,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:28:36,008 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2021-01-06 17:28:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:36,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528316422] [2021-01-06 17:28:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:36,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:36,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460582949] [2021-01-06 17:28:36,035 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:36,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:28:36,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:28:36,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:28:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528316422] [2021-01-06 17:28:36,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:36,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460582949] [2021-01-06 17:28:36,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:36,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:28:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573134462] [2021-01-06 17:28:36,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:28:36,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:28:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:28:36,885 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2021-01-06 17:28:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:36,942 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-01-06 17:28:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:28:36,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 17:28:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:36,943 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:28:36,943 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:28:36,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:28:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:28:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 17:28:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:28:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 17:28:36,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-01-06 17:28:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:36,949 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 17:28:36,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:28:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 17:28:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:28:36,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:36,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:37,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:37,155 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2021-01-06 17:28:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658276732] [2021-01-06 17:28:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:37,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:37,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878263847] [2021-01-06 17:28:37,170 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 17:28:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:43,092 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-06 17:28:44,113 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-01-06 17:28:44,826 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:46,183 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:47,616 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:49,015 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:28:49,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658276732] [2021-01-06 17:28:49,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:49,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878263847] [2021-01-06 17:28:49,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:28:49,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:49,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:28:49,057 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:28:49,057 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:28:49,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:49,285 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:28:49,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:28:49 BoogieIcfgContainer [2021-01-06 17:28:49,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:28:49,287 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:28:49,287 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:28:49,287 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:28:49,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:28" (3/4) ... [2021-01-06 17:28:49,293 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:28:49,293 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:28:49,300 INFO L168 Benchmark]: Toolchain (without parser) took 21236.37 ms. Allocated memory was 157.3 MB in the beginning and 206.6 MB in the end (delta: 49.3 MB). Free memory was 134.6 MB in the beginning and 119.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 65.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,303 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:28:49,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 157.3 MB. Free memory was 134.4 MB in the beginning and 124.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.02 ms. Allocated memory is still 157.3 MB. Free memory was 124.3 MB in the beginning and 122.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,307 INFO L168 Benchmark]: Boogie Preprocessor took 26.97 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,308 INFO L168 Benchmark]: RCFGBuilder took 551.46 ms. Allocated memory is still 157.3 MB. Free memory was 121.6 MB in the beginning and 136.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,309 INFO L168 Benchmark]: TraceAbstraction took 20321.15 ms. Allocated memory was 157.3 MB in the beginning and 206.6 MB in the end (delta: 49.3 MB). Free memory was 136.1 MB in the beginning and 120.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 121.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,309 INFO L168 Benchmark]: Witness Printer took 6.21 ms. Allocated memory is still 206.6 MB. Free memory was 120.1 MB in the beginning and 119.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:49,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.61 ms. Allocated memory is still 157.3 MB. Free memory was 134.4 MB in the beginning and 124.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.02 ms. Allocated memory is still 157.3 MB. Free memory was 124.3 MB in the beginning and 122.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.97 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 551.46 ms. Allocated memory is still 157.3 MB. Free memory was 121.6 MB in the beginning and 136.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20321.15 ms. Allocated memory was 157.3 MB in the beginning and 206.6 MB in the end (delta: 49.3 MB). Free memory was 136.1 MB in the beginning and 120.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 121.9 MB. Max. memory is 8.0 GB. * Witness Printer took 6.21 ms. Allocated memory is still 206.6 MB. Free memory was 120.1 MB in the beginning and 119.6 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND FALSE !(counter++<5) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 20.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 219 SDtfs, 388 SDslu, 380 SDs, 0 SdLazy, 330 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 19755 SizeOfPredicates, 39 NumberOfNonLiveVariables, 806 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 42/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...