/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:15:01,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:15:01,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:15:01,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:15:01,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:15:01,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:15:01,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:15:01,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:15:01,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:15:01,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:15:01,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:15:01,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:15:01,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:15:01,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:15:01,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:15:01,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:15:01,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:15:01,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:15:01,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:15:01,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:15:01,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:15:01,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:15:01,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:15:01,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:15:01,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:15:01,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:15:01,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:15:01,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:15:01,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:15:01,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:15:01,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:15:01,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:15:01,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:15:01,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:15:01,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:15:01,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:15:01,815 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 17:15:01,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:15:01,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:15:01,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:15:01,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:15:01,842 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:15:01,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:15:01,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:15:01,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:15:01,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:15:01,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:15:01,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:15:01,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:15:01,844 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:15:01,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:15:01,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:15:01,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:15:01,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:15:01,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:15:01,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:15:01,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:15:01,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:15:01,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:15:01,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:15:01,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:15:01,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:15:01,847 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:15:02,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:15:02,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:15:02,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:15:02,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:15:02,223 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:15:02,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prod4br-ll.c [2021-01-06 17:15:02,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1c8bf55d/30da1ac98efb48f7adfcf2b7c7fbb36c/FLAG85795bc41 [2021-01-06 17:15:02,848 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:15:02,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/prod4br-ll.c [2021-01-06 17:15:02,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1c8bf55d/30da1ac98efb48f7adfcf2b7c7fbb36c/FLAG85795bc41 [2021-01-06 17:15:03,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1c8bf55d/30da1ac98efb48f7adfcf2b7c7fbb36c [2021-01-06 17:15:03,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:15:03,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:15:03,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:15:03,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:15:03,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:15:03,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167da8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03, skipping insertion in model container [2021-01-06 17:15:03,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:15:03,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:15:03,495 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/prod4br-ll.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:15:03,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:15:03,557 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:15:03,572 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/prod4br-ll.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] 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[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~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[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:15:03,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:15:03,624 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:15:03,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03 WrapperNode [2021-01-06 17:15:03,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:15:03,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:15:03,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:15:03,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:15:03,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:15:03,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:15:03,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:15:03,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:15:03,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (1/1) ... [2021-01-06 17:15:03,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:15:03,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:15:03,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:15:03,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:15:03,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (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 17:15:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:15:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:15:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:15:03,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:15:04,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:15:04,095 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:15:04,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:15:04 BoogieIcfgContainer [2021-01-06 17:15:04,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:15:04,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:15:04,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:15:04,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:15:04,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:15:03" (1/3) ... [2021-01-06 17:15:04,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486de97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:15:04, skipping insertion in model container [2021-01-06 17:15:04,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:03" (2/3) ... [2021-01-06 17:15:04,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486de97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:15:04, skipping insertion in model container [2021-01-06 17:15:04,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:15:04" (3/3) ... [2021-01-06 17:15:04,108 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2021-01-06 17:15:04,166 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:15:04,171 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:15:04,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:15:04,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:15:04,251 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:15:04,251 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:15:04,251 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:15:04,251 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:15:04,252 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:15:04,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:15:04,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:15:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 17:15:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:15:04,273 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:04,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:04,275 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:15:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:04,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198911466] [2021-01-06 17:15:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:04,443 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 17:15:04,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198911466] [2021-01-06 17:15:04,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:04,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:15:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278572676] [2021-01-06 17:15:04,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:15:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:04,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:15:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:15:04,468 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 17:15:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:04,486 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-01-06 17:15:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:15:04,488 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:15:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:04,497 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:15:04,497 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:15:04,500 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 17:15:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:15:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:15:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:15:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:15:04,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2021-01-06 17:15:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:04,536 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:15:04,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:15:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:15:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:15:04,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:04,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:04,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:15:04,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:15:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:04,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022833932] [2021-01-06 17:15:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:04,558 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062017320] [2021-01-06 17:15:04,559 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 17:15:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:15:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:04,851 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 17:15:04,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022833932] [2021-01-06 17:15:04,852 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:04,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062017320] [2021-01-06 17:15:04,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:04,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:15:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577847723] [2021-01-06 17:15:04,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:15:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:15:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:15:04,856 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2021-01-06 17:15:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:05,230 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-01-06 17:15:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:15:05,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2021-01-06 17:15:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:05,233 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:15:05,233 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:15:05,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:15:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:15:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2021-01-06 17:15:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:15:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 17:15:05,250 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2021-01-06 17:15:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:05,251 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 17:15:05,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:15:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 17:15:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:15:05,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:05,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:05,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:15:05,466 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:05,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1864211483, now seen corresponding path program 1 times [2021-01-06 17:15:05,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:05,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195185351] [2021-01-06 17:15:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:05,489 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:05,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765402122] [2021-01-06 17:15:05,490 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 17:15:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:15:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:05,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:05,933 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 17:15:06,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:06,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:15:06,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:15:06,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:15:06,054 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:15:06,059 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:15:06,131 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 17:15:06,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195185351] [2021-01-06 17:15:06,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:06,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765402122] [2021-01-06 17:15:06,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:06,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:15:06,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089256900] [2021-01-06 17:15:06,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:15:06,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:15:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:15:06,135 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2021-01-06 17:15:06,327 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-01-06 17:15:09,025 WARN L197 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-06 17:15:09,217 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-01-06 17:15:09,380 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2021-01-06 17:15:13,889 WARN L197 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-06 17:15:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:14,158 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 17:15:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:15:14,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2021-01-06 17:15:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:14,161 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:15:14,161 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:15:14,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:15:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:15:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-01-06 17:15:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:15:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 17:15:14,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 10 [2021-01-06 17:15:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:14,170 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 17:15:14,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:15:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 17:15:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:15:14,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:14,171 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:14,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:14,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1954678172, now seen corresponding path program 1 times [2021-01-06 17:15:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:14,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643335077] [2021-01-06 17:15:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:14,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:14,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371465926] [2021-01-06 17:15:14,409 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 17:15:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:15:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:14,605 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:14,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:14,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:15:16,699 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 17:15:16,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643335077] [2021-01-06 17:15:16,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:16,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371465926] [2021-01-06 17:15:16,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:15:16,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220468239] [2021-01-06 17:15:16,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:15:16,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:16,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:15:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:15:16,705 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 7 states. [2021-01-06 17:15:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:19,098 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 17:15:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:15:19,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-06 17:15:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:19,100 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:15:19,100 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:15:19,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:15:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:15:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-01-06 17:15:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:15:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-01-06 17:15:19,109 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-01-06 17:15:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:19,109 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-01-06 17:15:19,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:15:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-01-06 17:15:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:15:19,110 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:19,110 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:19,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:19,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash -462951875, now seen corresponding path program 1 times [2021-01-06 17:15:19,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:19,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387857452] [2021-01-06 17:15:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:19,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:19,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089750339] [2021-01-06 17:15:19,340 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 17:15:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:15:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:23,669 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:15:23,727 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 17:15:23,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387857452] [2021-01-06 17:15:23,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:23,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089750339] [2021-01-06 17:15:23,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:23,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:15:23,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590558767] [2021-01-06 17:15:23,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:15:23,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:23,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:15:23,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:15:23,730 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 8 states. [2021-01-06 17:15:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:28,261 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-01-06 17:15:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:15:28,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 17:15:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:28,263 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:15:28,263 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:15:28,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:15:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:15:28,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-01-06 17:15:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 17:15:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-01-06 17:15:28,271 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2021-01-06 17:15:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:28,271 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-01-06 17:15:28,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:15:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-01-06 17:15:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:15:28,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:28,273 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:28,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:28,481 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1463868387, now seen corresponding path program 1 times [2021-01-06 17:15:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:28,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706647572] [2021-01-06 17:15:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:28,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:28,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221370542] [2021-01-06 17:15:28,511 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 17:15:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:15:28,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:32,851 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:15:32,923 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 17:15:32,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706647572] [2021-01-06 17:15:32,924 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:32,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221370542] [2021-01-06 17:15:32,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:32,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:15:32,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626606264] [2021-01-06 17:15:32,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:15:32,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:32,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:15:32,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:15:32,926 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 8 states. [2021-01-06 17:15:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:35,683 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-01-06 17:15:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:15:35,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:15:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:35,685 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:15:35,685 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:15:35,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:15:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:15:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-01-06 17:15:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:15:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-01-06 17:15:35,694 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 13 [2021-01-06 17:15:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:35,694 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-01-06 17:15:35,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:15:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-01-06 17:15:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:15:35,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:35,695 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:35,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:15:35,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1463927969, now seen corresponding path program 1 times [2021-01-06 17:15:35,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:35,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842637571] [2021-01-06 17:15:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:35,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:35,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413609304] [2021-01-06 17:15:35,927 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 17:15:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:15:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:40,274 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:15:40,383 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 17:15:40,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842637571] [2021-01-06 17:15:40,383 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:40,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413609304] [2021-01-06 17:15:40,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:40,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:15:40,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835449145] [2021-01-06 17:15:40,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:15:40,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:15:40,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:15:40,385 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2021-01-06 17:15:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:47,149 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-01-06 17:15:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:15:47,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-01-06 17:15:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:47,151 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:15:47,151 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:15:47,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:15:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:15:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2021-01-06 17:15:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:15:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-01-06 17:15:47,166 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 13 [2021-01-06 17:15:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:47,166 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-01-06 17:15:47,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:15:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-01-06 17:15:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:15:47,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:47,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:47,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:47,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -645914224, now seen corresponding path program 1 times [2021-01-06 17:15:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:47,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704925773] [2021-01-06 17:15:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:47,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:47,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691071688] [2021-01-06 17:15:47,411 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 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 17:15:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:15:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:47,592 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 17:15:47,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704925773] [2021-01-06 17:15:47,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:47,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691071688] [2021-01-06 17:15:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:15:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034163902] [2021-01-06 17:15:47,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:15:47,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:15:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:15:47,595 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 6 states. [2021-01-06 17:15:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:47,790 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2021-01-06 17:15:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:15:47,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 17:15:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:47,792 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:15:47,792 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:15:47,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:15:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:15:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2021-01-06 17:15:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 17:15:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-01-06 17:15:47,802 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 14 [2021-01-06 17:15:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:47,803 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-01-06 17:15:47,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:15:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-01-06 17:15:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:15:47,804 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:47,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:48,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:48,019 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1452798489, now seen corresponding path program 2 times [2021-01-06 17:15:48,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:48,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110184435] [2021-01-06 17:15:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:48,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:48,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628142799] [2021-01-06 17:15:48,034 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 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 17:15:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:15:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:15:48,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:15:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:50,299 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~p~0 4) (<= 1 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~a~0 (div c_ULTIMATE.start_main_~x~0 2)) (= (mod c_ULTIMATE.start_main_~x~0 2) 0) (= c_ULTIMATE.start_main_~b~0 (div c_ULTIMATE.start_main_~y~0 2)) (= c_ULTIMATE.start_main_~q~0 0) (<= (mod c_ULTIMATE.start_main_~y~0 2) 0) (let ((.cse0 (= (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~p~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~q~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)) (and .cse0 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond))))) is different from false [2021-01-06 17:16:00,467 WARN L197 SmtUtils]: Spent 8.14 s on a formula simplification that was a NOOP. DAG size: 26 [2021-01-06 17:16:12,660 WARN L197 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-01-06 17:16:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110184435] [2021-01-06 17:16:12,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:12,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628142799] [2021-01-06 17:16:12,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:16:12,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:12,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:16:12,690 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:16:12,691 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:16:12,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:16:12,916 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:16:12,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:16:12 BoogieIcfgContainer [2021-01-06 17:16:12,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:16:12,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:16:12,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:16:12,918 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:16:12,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:15:04" (3/4) ... [2021-01-06 17:16:12,922 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:16:12,922 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:16:12,923 INFO L168 Benchmark]: Toolchain (without parser) took 69680.46 ms. Allocated memory was 175.1 MB in the beginning and 243.3 MB in the end (delta: 68.2 MB). Free memory was 149.7 MB in the beginning and 166.7 MB in the end (delta: -17.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,923 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 146.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:12,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.37 ms. Allocated memory is still 175.1 MB. Free memory was 149.5 MB in the beginning and 139.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 175.1 MB. Free memory was 139.4 MB in the beginning and 138.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,937 INFO L168 Benchmark]: Boogie Preprocessor took 25.53 ms. Allocated memory is still 175.1 MB. Free memory was 138.0 MB in the beginning and 136.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,939 INFO L168 Benchmark]: RCFGBuilder took 403.41 ms. Allocated memory is still 175.1 MB. Free memory was 136.7 MB in the beginning and 122.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,940 INFO L168 Benchmark]: TraceAbstraction took 68817.91 ms. Allocated memory was 175.1 MB in the beginning and 243.3 MB in the end (delta: 68.2 MB). Free memory was 121.6 MB in the beginning and 167.2 MB in the end (delta: -45.6 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:12,940 INFO L168 Benchmark]: Witness Printer took 4.15 ms. Allocated memory is still 243.3 MB. Free memory was 167.2 MB in the beginning and 166.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:12,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 175.1 MB. Free memory is still 146.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 379.37 ms. Allocated memory is still 175.1 MB. Free memory was 149.5 MB in the beginning and 139.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 175.1 MB. Free memory was 139.4 MB in the beginning and 138.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.53 ms. Allocated memory is still 175.1 MB. Free memory was 138.0 MB in the beginning and 136.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.41 ms. Allocated memory is still 175.1 MB. Free memory was 136.7 MB in the beginning and 122.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68817.91 ms. Allocated memory was 175.1 MB in the beginning and 243.3 MB in the end (delta: 68.2 MB). Free memory was 121.6 MB in the beginning and 167.2 MB in the end (delta: -45.6 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. * Witness Printer took 4.15 ms. Allocated memory is still 243.3 MB. Free memory was 167.2 MB in the beginning and 166.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L35] COND FALSE !(!(a != 0 && b != 0)) [L38] COND TRUE a % 2 == 0 && b % 2 == 0 [L39] a = a / 2 [L40] b = b / 2 [L41] p = 4 * p [L32] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 68.6s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 25.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 118 SDtfs, 458 SDslu, 257 SDs, 0 SdLazy, 476 SolverSat, 130 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=8, 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, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 79 ConstructedInterpolants, 1 QuantifiedInterpolants, 8817 SizeOfPredicates, 65 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 3/11 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...