/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/divbin2_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:33:38,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:33:38,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:33:38,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:33:38,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:33:38,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:33:38,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:33:38,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:33:38,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:33:38,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:33:38,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:33:38,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:33:38,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:33:38,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:33:38,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:33:38,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:33:38,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:33:38,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:33:38,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:33:39,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:33:39,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:33:39,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:33:39,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:33:39,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:33:39,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:33:39,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:33:39,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:33:39,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:33:39,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:33:39,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:33:39,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:33:39,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:33:39,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:33:39,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:33:39,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:33:39,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:33:39,040 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 07:33:39,089 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:33:39,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:33:39,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:33:39,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:33:39,094 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:33:39,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:33:39,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:33:39,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:33:39,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:33:39,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:33:39,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:33:39,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:33:39,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:33:39,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:33:39,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:33:39,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:33:39,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:33:39,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:33:39,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:33:39,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:33:39,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:33:39,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:33:39,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:33:39,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:33:39,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:33:39,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:33:39,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:33:39,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:33:39,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:33:39,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:33:39,503 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:33:39,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-12-23 07:33:39,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5ee1fa6e/9403889a8a914ca5b87a176e0dfd98d9/FLAGeaf84a4ba [2020-12-23 07:33:40,320 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:33:40,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-12-23 07:33:40,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5ee1fa6e/9403889a8a914ca5b87a176e0dfd98d9/FLAGeaf84a4ba [2020-12-23 07:33:40,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5ee1fa6e/9403889a8a914ca5b87a176e0dfd98d9 [2020-12-23 07:33:40,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:33:40,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:33:40,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:33:40,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:33:40,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:33:40,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a24e9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40, skipping insertion in model container [2020-12-23 07:33:40,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:33:40,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:33:40,866 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/divbin2_valuebound2.i[951,964] 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,] [2020-12-23 07:33:40,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:33:40,895 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:33:40,911 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/divbin2_valuebound2.i[951,964] 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,] [2020-12-23 07:33:40,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:33:40,935 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:33:40,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40 WrapperNode [2020-12-23 07:33:40,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:33:40,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:33:40,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:33:40,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:33:40,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:33:40,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:33:40,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:33:40,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:33:40,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:40,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (1/1) ... [2020-12-23 07:33:41,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:33:41,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:33:41,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:33:41,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:33:41,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (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 07:33:41,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:33:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:33:41,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:33:41,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:33:41,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:33:41,576 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 07:33:41,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:41 BoogieIcfgContainer [2020-12-23 07:33:41,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:33:41,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:33:41,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:33:41,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:33:41,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:33:40" (1/3) ... [2020-12-23 07:33:41,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d32890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:33:41, skipping insertion in model container [2020-12-23 07:33:41,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:40" (2/3) ... [2020-12-23 07:33:41,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d32890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:33:41, skipping insertion in model container [2020-12-23 07:33:41,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:41" (3/3) ... [2020-12-23 07:33:41,605 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2020-12-23 07:33:41,616 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:33:41,631 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:33:41,654 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:33:41,710 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:33:41,710 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:33:41,710 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:33:41,710 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:33:41,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:33:41,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:33:41,711 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:33:41,711 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:33:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:33:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:33:41,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:41,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:41,735 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:41,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2020-12-23 07:33:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:41,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164123663] [2020-12-23 07:33:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:41,915 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 07:33:41,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164123663] [2020-12-23 07:33:41,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:33:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395963450] [2020-12-23 07:33:41,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:33:41,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:33:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:33:41,943 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 07:33:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:41,963 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-23 07:33:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:33:41,965 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 07:33:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:41,975 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:33:41,975 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:33:41,979 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 07:33:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:33:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:33:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:33:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 07:33:42,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 07:33:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:42,018 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 07:33:42,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:33:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 07:33:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:33:42,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:42,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:42,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:33:42,020 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2020-12-23 07:33:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:42,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507421639] [2020-12-23 07:33:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:42,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:42,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847150564] [2020-12-23 07:33:42,045 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 07:33:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:42,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:33:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:42,385 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 07:33:42,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507421639] [2020-12-23 07:33:42,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:42,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847150564] [2020-12-23 07:33:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:42,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:33:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003156337] [2020-12-23 07:33:42,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:33:42,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:33:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:33:42,391 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-23 07:33:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:42,831 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 07:33:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:33:42,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 07:33:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:42,833 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:33:42,834 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:33:42,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:33:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:33:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-23 07:33:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:33:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 07:33:42,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2020-12-23 07:33:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:42,842 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 07:33:42,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:33:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 07:33:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:33:42,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:42,844 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:43,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:33:43,060 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:43,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2020-12-23 07:33:43,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:43,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111417546] [2020-12-23 07:33:43,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:43,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:43,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399627134] [2020-12-23 07:33:43,088 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 07:33:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:33:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:43,379 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 07:33:43,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111417546] [2020-12-23 07:33:43,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:43,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399627134] [2020-12-23 07:33:43,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:43,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:33:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696905743] [2020-12-23 07:33:43,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:33:43,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:43,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:33:43,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:33:43,387 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-12-23 07:33:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:43,969 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:33:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:33:43,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 07:33:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:43,971 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:33:43,972 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:33:43,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:33:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:33:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-23 07:33:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:33:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 07:33:43,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2020-12-23 07:33:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:43,979 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 07:33:43,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:33:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 07:33:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:33:43,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:43,980 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:44,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:44,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -580289007, now seen corresponding path program 1 times [2020-12-23 07:33:44,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:44,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010058318] [2020-12-23 07:33:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:44,212 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:44,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945098937] [2020-12-23 07:33:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:33:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:44,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010058318] [2020-12-23 07:33:44,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945098937] [2020-12-23 07:33:44,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:44,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:33:44,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499455083] [2020-12-23 07:33:44,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:33:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:33:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:33:44,330 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-12-23 07:33:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:44,364 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-23 07:33:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:33:44,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 07:33:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:44,366 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:33:44,366 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:33:44,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:33:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:33:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:33:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:33:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 07:33:44,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2020-12-23 07:33:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:44,371 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 07:33:44,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:33:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 07:33:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:33:44,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:44,372 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:44,588 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 505525932, now seen corresponding path program 1 times [2020-12-23 07:33:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:44,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355567828] [2020-12-23 07:33:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:44,610 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:44,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578347601] [2020-12-23 07:33:44,611 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 07:33:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:33:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355567828] [2020-12-23 07:33:45,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578347601] [2020-12-23 07:33:45,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:45,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:33:45,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711643008] [2020-12-23 07:33:45,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:33:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:33:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:33:45,015 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-12-23 07:33:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:45,719 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 07:33:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:33:45,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:33:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:45,721 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:33:45,721 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:33:45,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:33:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:33:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 07:33:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:33:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 07:33:45,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2020-12-23 07:33:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:45,729 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 07:33:45,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:33:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 07:33:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:33:45,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:45,730 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:45,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:45,937 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash 296629383, now seen corresponding path program 2 times [2020-12-23 07:33:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:45,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094208058] [2020-12-23 07:33:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:45,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:45,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881044936] [2020-12-23 07:33:45,958 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:46,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:33:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:33:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:33:46,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094208058] [2020-12-23 07:33:46,321 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:46,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881044936] [2020-12-23 07:33:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:33:46,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158829928] [2020-12-23 07:33:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:33:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:33:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:33:46,323 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-12-23 07:33:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:46,686 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-12-23 07:33:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:33:46,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 07:33:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:46,688 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:33:46,688 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:33:46,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:33:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:33:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-12-23 07:33:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:33:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 07:33:46,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-12-23 07:33:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:46,695 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 07:33:46,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:33:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 07:33:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:33:46,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:46,696 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:46,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:33:46,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1023135329, now seen corresponding path program 3 times [2020-12-23 07:33:46,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:46,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169755921] [2020-12-23 07:33:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:46,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:46,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198681206] [2020-12-23 07:33:46,927 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:33:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:33:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:47,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169755921] [2020-12-23 07:33:47,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:47,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198681206] [2020-12-23 07:33:47,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:47,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:33:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417130212] [2020-12-23 07:33:47,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:33:47,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:33:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:33:47,251 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-12-23 07:33:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:47,342 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-23 07:33:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:33:47,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:33:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:47,345 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:33:47,345 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:33:47,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:33:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:33:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 07:33:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:33:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 07:33:47,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-12-23 07:33:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:47,381 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 07:33:47,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:33:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 07:33:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:33:47,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:47,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:47,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:47,598 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2014308028, now seen corresponding path program 4 times [2020-12-23 07:33:47,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:47,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675922065] [2020-12-23 07:33:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:47,616 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:47,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066139184] [2020-12-23 07:33:47,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:47,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:33:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:33:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:48,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675922065] [2020-12-23 07:33:48,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:48,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066139184] [2020-12-23 07:33:48,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:48,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:33:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591136099] [2020-12-23 07:33:48,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:33:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:33:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:33:48,077 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-12-23 07:33:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:48,612 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-23 07:33:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:33:48,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 07:33:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:48,614 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:33:48,614 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:33:48,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:33:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:33:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 07:33:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 07:33:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2020-12-23 07:33:48,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 21 [2020-12-23 07:33:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:48,620 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2020-12-23 07:33:48,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:33:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2020-12-23 07:33:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:33:48,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:48,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:48,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:48,836 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2014367610, now seen corresponding path program 1 times [2020-12-23 07:33:48,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:48,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872230394] [2020-12-23 07:33:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:48,859 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:48,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663591377] [2020-12-23 07:33:48,860 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 [2020-12-23 07:33:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:33:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:49,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-23 07:33:50,238 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:50,751 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:52,042 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:53,492 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:55,494 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:56,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872230394] [2020-12-23 07:33:56,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:56,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663591377] [2020-12-23 07:33:56,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:33:56,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:56,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:33:56,053 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:33:56,053 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:33:56,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:33:56,281 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:33:56,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:33:56 BoogieIcfgContainer [2020-12-23 07:33:56,282 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:33:56,283 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:33:56,283 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:33:56,283 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:33:56,284 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:41" (3/4) ... [2020-12-23 07:33:56,287 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:33:56,287 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:33:56,290 INFO L168 Benchmark]: Toolchain (without parser) took 15622.43 ms. Allocated memory was 151.0 MB in the beginning and 346.0 MB in the end (delta: 195.0 MB). Free memory was 126.1 MB in the beginning and 211.5 MB in the end (delta: -85.4 MB). Peak memory consumption was 110.2 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,290 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:33:56,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.02 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.32 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,292 INFO L168 Benchmark]: Boogie Preprocessor took 24.35 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 113.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,293 INFO L168 Benchmark]: RCFGBuilder took 575.70 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 100.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,294 INFO L168 Benchmark]: TraceAbstraction took 14696.85 ms. Allocated memory was 151.0 MB in the beginning and 346.0 MB in the end (delta: 195.0 MB). Free memory was 100.0 MB in the beginning and 211.7 MB in the end (delta: -111.7 MB). Peak memory consumption was 181.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:56,295 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 346.0 MB. Free memory was 211.7 MB in the beginning and 211.5 MB in the end (delta: 219.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:33:56,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.02 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.32 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.35 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 113.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 575.70 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 100.5 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14696.85 ms. Allocated memory was 151.0 MB in the beginning and 346.0 MB in the end (delta: 195.0 MB). Free memory was 100.0 MB in the beginning and 211.7 MB in the end (delta: -111.7 MB). Peak memory consumption was 181.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.82 ms. Allocated memory is still 346.0 MB. Free memory was 211.7 MB in the beginning and 211.5 MB in the end (delta: 219.1 kB). There was no memory consumed. 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: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 14.5s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 302 SDslu, 183 SDs, 0 SdLazy, 380 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 16709 SizeOfPredicates, 39 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 17/40 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...