/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:42:06,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:42:06,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:42:06,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:42:06,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:42:06,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:42:06,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:42:06,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:42:06,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:42:06,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:42:06,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:42:06,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:42:06,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:42:06,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:42:06,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:42:06,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:42:06,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:42:06,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:42:06,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:42:06,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:42:06,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:42:06,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:42:06,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:42:06,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:42:06,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:42:06,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:42:06,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:42:06,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:42:06,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:42:06,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:42:06,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:42:06,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:42:06,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:42:06,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:42:06,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:42:06,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:42:06,553 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 07:42:06,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:42:06,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:42:06,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:42:06,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:42:06,607 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:42:06,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:42:06,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:42:06,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:42:06,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:42:06,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:42:06,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:42:06,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:42:06,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:42:06,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:42:06,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:42:06,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:42:06,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:42:06,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:42:06,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:42:06,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:42:06,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:42:06,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:42:06,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:42:06,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:42:06,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:42:06,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:42:07,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:42:07,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:42:07,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:42:07,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:42:07,084 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:42:07,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2020-12-23 07:42:07,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fdec69b4f/053fd11f326943c89332cf7824932cde/FLAG9ae8da59e [2020-12-23 07:42:07,892 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:42:07,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2020-12-23 07:42:07,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fdec69b4f/053fd11f326943c89332cf7824932cde/FLAG9ae8da59e [2020-12-23 07:42:08,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fdec69b4f/053fd11f326943c89332cf7824932cde [2020-12-23 07:42:08,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:42:08,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:42:08,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:08,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:42:08,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:42:08,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f2464ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08, skipping insertion in model container [2020-12-23 07:42:08,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:42:08,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:42:08,472 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/egcd3-ll_valuebound10.c[490,503] 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[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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[~temp~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[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 07:42:08,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:08,525 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:42:08,544 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/egcd3-ll_valuebound10.c[490,503] 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[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~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[~temp~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[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 07:42:08,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:08,607 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:42:08,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08 WrapperNode [2020-12-23 07:42:08,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:08,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:08,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:42:08,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:42:08,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:08,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:42:08,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:42:08,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:42:08,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (1/1) ... [2020-12-23 07:42:08,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:42:08,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:42:08,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:42:08,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:42:08,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (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 07:42:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:42:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:42:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:42:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:42:09,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:42:09,440 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-23 07:42:09,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:09 BoogieIcfgContainer [2020-12-23 07:42:09,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:42:09,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:42:09,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:42:09,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:42:09,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:42:08" (1/3) ... [2020-12-23 07:42:09,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:09, skipping insertion in model container [2020-12-23 07:42:09,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:08" (2/3) ... [2020-12-23 07:42:09,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:09, skipping insertion in model container [2020-12-23 07:42:09,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:09" (3/3) ... [2020-12-23 07:42:09,451 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2020-12-23 07:42:09,459 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:42:09,464 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 07:42:09,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 07:42:09,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:42:09,511 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:42:09,511 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:42:09,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:42:09,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:42:09,512 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:42:09,512 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:42:09,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:42:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-23 07:42:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:42:09,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:09,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:09,539 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2020-12-23 07:42:09,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:09,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108836134] [2020-12-23 07:42:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:09,720 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 07:42:09,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108836134] [2020-12-23 07:42:09,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:42:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261377568] [2020-12-23 07:42:09,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:42:09,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:42:09,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:42:09,747 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-23 07:42:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:09,770 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2020-12-23 07:42:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:42:09,771 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 07:42:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:09,781 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:42:09,781 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:42:09,785 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 07:42:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:42:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:42:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:42:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 07:42:09,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2020-12-23 07:42:09,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:09,826 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 07:42:09,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:42:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 07:42:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:42:09,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:09,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:09,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:42:09,828 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2020-12-23 07:42:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:09,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661349441] [2020-12-23 07:42:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:09,855 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:09,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790458466] [2020-12-23 07:42:09,856 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 07:42:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:42:09,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:10,078 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 07:42:10,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661349441] [2020-12-23 07:42:10,079 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:10,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790458466] [2020-12-23 07:42:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:10,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040909195] [2020-12-23 07:42:10,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:10,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:10,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:10,084 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-12-23 07:42:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:10,219 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-23 07:42:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:42:10,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:42:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:10,222 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:42:10,222 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:42:10,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:42:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-12-23 07:42:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:42:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 07:42:10,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2020-12-23 07:42:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:10,233 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 07:42:10,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 07:42:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:42:10,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:10,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:10,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:42:10,451 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:10,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:10,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2020-12-23 07:42:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:10,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100734082] [2020-12-23 07:42:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:10,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:10,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407660010] [2020-12-23 07:42:10,481 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 07:42:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:10,931 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 07:42:10,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100734082] [2020-12-23 07:42:10,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:10,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407660010] [2020-12-23 07:42:10,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:10,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 07:42:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191789623] [2020-12-23 07:42:10,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:42:10,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:42:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:42:10,941 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-12-23 07:42:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:11,387 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-12-23 07:42:11,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:11,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 07:42:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:11,389 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:42:11,389 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:42:11,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:42:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:42:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-23 07:42:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-23 07:42:11,400 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2020-12-23 07:42:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:11,400 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-23 07:42:11,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:42:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-23 07:42:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:42:11,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:11,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:11,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:11,616 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:11,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2020-12-23 07:42:11,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669191077] [2020-12-23 07:42:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:11,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:11,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521127030] [2020-12-23 07:42:11,653 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 07:42:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:42:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:11,943 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 07:42:11,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669191077] [2020-12-23 07:42:11,944 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:11,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521127030] [2020-12-23 07:42:11,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:11,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:11,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018457416] [2020-12-23 07:42:11,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:11,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:11,950 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-12-23 07:42:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:12,248 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 07:42:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:12,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 07:42:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:12,249 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:42:12,250 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:42:12,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:42:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-23 07:42:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-23 07:42:12,259 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2020-12-23 07:42:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:12,259 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-23 07:42:12,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-23 07:42:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:42:12,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:12,260 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:12,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:12,475 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2020-12-23 07:42:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:12,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403472306] [2020-12-23 07:42:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:12,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:12,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668649786] [2020-12-23 07:42:12,496 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 07:42:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:42:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:12,624 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 07:42:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403472306] [2020-12-23 07:42:12,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668649786] [2020-12-23 07:42:12,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:12,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:42:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220183269] [2020-12-23 07:42:12,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:42:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:42:12,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:12,627 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-12-23 07:42:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:12,812 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-12-23 07:42:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:12,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 07:42:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:12,820 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:42:12,821 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:42:12,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:42:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2020-12-23 07:42:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:42:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-12-23 07:42:12,850 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2020-12-23 07:42:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:12,851 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-12-23 07:42:12,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:42:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-12-23 07:42:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:42:12,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:12,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:13,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:13,065 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:13,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2020-12-23 07:42:13,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:13,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561064059] [2020-12-23 07:42:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:13,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:13,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10123163] [2020-12-23 07:42:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:42:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:13,297 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 07:42:13,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561064059] [2020-12-23 07:42:13,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:13,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10123163] [2020-12-23 07:42:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:13,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436737482] [2020-12-23 07:42:13,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:13,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:13,305 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2020-12-23 07:42:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:13,565 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-12-23 07:42:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:42:13,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 07:42:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:13,567 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:42:13,567 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:42:13,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:42:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-12-23 07:42:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:42:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-12-23 07:42:13,582 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2020-12-23 07:42:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:13,582 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-12-23 07:42:13,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-12-23 07:42:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:42:13,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:13,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:13,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:42:13,798 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2020-12-23 07:42:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667968786] [2020-12-23 07:42:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:13,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:13,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740887976] [2020-12-23 07:42:13,817 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 [2020-12-23 07:42:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:42:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:14,044 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 07:42:14,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667968786] [2020-12-23 07:42:14,045 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:14,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740887976] [2020-12-23 07:42:14,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:14,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:14,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242055708] [2020-12-23 07:42:14,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:14,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:14,047 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-12-23 07:42:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:14,291 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-12-23 07:42:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:14,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:42:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:14,293 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:42:14,293 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 07:42:14,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 07:42:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2020-12-23 07:42:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:42:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-12-23 07:42:14,312 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 22 [2020-12-23 07:42:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:14,313 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-12-23 07:42:14,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-12-23 07:42:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:42:14,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:14,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:14,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:14,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2020-12-23 07:42:14,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:14,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933714933] [2020-12-23 07:42:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:14,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:14,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92785555] [2020-12-23 07:42:14,545 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 [2020-12-23 07:42:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:42:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:14,658 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 07:42:14,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933714933] [2020-12-23 07:42:14,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:14,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92785555] [2020-12-23 07:42:14,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:14,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:14,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814605422] [2020-12-23 07:42:14,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:14,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:14,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:14,665 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 5 states. [2020-12-23 07:42:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:14,808 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-12-23 07:42:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:14,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 07:42:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:14,812 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:42:14,812 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 07:42:14,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 07:42:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2020-12-23 07:42:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2020-12-23 07:42:14,846 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 23 [2020-12-23 07:42:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:14,846 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2020-12-23 07:42:14,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2020-12-23 07:42:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:42:14,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:14,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:15,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:15,063 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2020-12-23 07:42:15,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:15,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966485022] [2020-12-23 07:42:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:15,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:15,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136896311] [2020-12-23 07:42:15,080 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 07:42:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:42:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:15,283 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 07:42:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966485022] [2020-12-23 07:42:15,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136896311] [2020-12-23 07:42:15,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:15,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:15,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369360910] [2020-12-23 07:42:15,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:15,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:15,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:15,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:15,286 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand 8 states. [2020-12-23 07:42:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:15,577 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-12-23 07:42:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:15,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 07:42:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:15,579 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:42:15,580 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:42:15,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:42:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2020-12-23 07:42:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-12-23 07:42:15,602 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 24 [2020-12-23 07:42:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:15,602 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-12-23 07:42:15,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-12-23 07:42:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:42:15,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:15,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:15,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:42:15,817 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash 151041369, now seen corresponding path program 1 times [2020-12-23 07:42:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:15,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018643306] [2020-12-23 07:42:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:15,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:15,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842933097] [2020-12-23 07:42:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:42:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:16,025 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 07:42:16,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018643306] [2020-12-23 07:42:16,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:16,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842933097] [2020-12-23 07:42:16,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:16,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:42:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792045024] [2020-12-23 07:42:16,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:42:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:42:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:42:16,028 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 11 states. [2020-12-23 07:42:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:16,419 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-12-23 07:42:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:42:16,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 07:42:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:16,422 INFO L225 Difference]: With dead ends: 277 [2020-12-23 07:42:16,422 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 07:42:16,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 07:42:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 198. [2020-12-23 07:42:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:42:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-12-23 07:42:16,448 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 26 [2020-12-23 07:42:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:16,448 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-12-23 07:42:16,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:42:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-12-23 07:42:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:42:16,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:16,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:16,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:16,662 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash -74821968, now seen corresponding path program 2 times [2020-12-23 07:42:16,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:16,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454238370] [2020-12-23 07:42:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:16,676 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:16,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446938741] [2020-12-23 07:42:16,676 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:16,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:16,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:42:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:16,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454238370] [2020-12-23 07:42:16,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:16,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446938741] [2020-12-23 07:42:16,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:16,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:16,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732562505] [2020-12-23 07:42:16,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:16,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:16,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:16,777 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 5 states. [2020-12-23 07:42:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:16,885 INFO L93 Difference]: Finished difference Result 291 states and 355 transitions. [2020-12-23 07:42:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:16,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 07:42:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:16,888 INFO L225 Difference]: With dead ends: 291 [2020-12-23 07:42:16,888 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:16,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2020-12-23 07:42:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:42:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2020-12-23 07:42:16,909 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 27 [2020-12-23 07:42:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:16,910 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2020-12-23 07:42:16,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2020-12-23 07:42:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:16,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:16,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:17,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:17,126 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2020-12-23 07:42:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:17,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468188778] [2020-12-23 07:42:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:17,139 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:17,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286854008] [2020-12-23 07:42:17,139 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:42:17,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:17,667 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 07:42:17,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468188778] [2020-12-23 07:42:17,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:17,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286854008] [2020-12-23 07:42:17,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:17,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:42:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104477962] [2020-12-23 07:42:17,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:42:17,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:42:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:17,670 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 13 states. [2020-12-23 07:42:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:18,414 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2020-12-23 07:42:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:42:18,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 07:42:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:18,417 INFO L225 Difference]: With dead ends: 282 [2020-12-23 07:42:18,418 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 07:42:18,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:42:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 07:42:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2020-12-23 07:42:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2020-12-23 07:42:18,445 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 32 [2020-12-23 07:42:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:18,445 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2020-12-23 07:42:18,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:42:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2020-12-23 07:42:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:18,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:18,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:18,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:42:18,666 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2020-12-23 07:42:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:18,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857808976] [2020-12-23 07:42:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:18,680 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:18,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124752016] [2020-12-23 07:42:18,680 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:42:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:18,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857808976] [2020-12-23 07:42:18,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:18,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124752016] [2020-12-23 07:42:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:18,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123130515] [2020-12-23 07:42:18,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:18,860 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 9 states. [2020-12-23 07:42:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:19,284 INFO L93 Difference]: Finished difference Result 211 states and 244 transitions. [2020-12-23 07:42:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:19,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-23 07:42:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:19,286 INFO L225 Difference]: With dead ends: 211 [2020-12-23 07:42:19,286 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:19,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2020-12-23 07:42:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:42:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2020-12-23 07:42:19,312 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 32 [2020-12-23 07:42:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:19,313 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2020-12-23 07:42:19,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2020-12-23 07:42:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:19,314 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:19,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:42:19,528 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -315127458, now seen corresponding path program 2 times [2020-12-23 07:42:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569604828] [2020-12-23 07:42:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:19,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:19,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070399393] [2020-12-23 07:42:19,543 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:19,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:42:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569604828] [2020-12-23 07:42:19,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:19,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070399393] [2020-12-23 07:42:19,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:19,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:19,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41619392] [2020-12-23 07:42:19,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:19,703 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand 8 states. [2020-12-23 07:42:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:20,102 INFO L93 Difference]: Finished difference Result 402 states and 471 transitions. [2020-12-23 07:42:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:42:20,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 07:42:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:20,105 INFO L225 Difference]: With dead ends: 402 [2020-12-23 07:42:20,106 INFO L226 Difference]: Without dead ends: 398 [2020-12-23 07:42:20,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-23 07:42:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 221. [2020-12-23 07:42:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:42:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2020-12-23 07:42:20,141 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 37 [2020-12-23 07:42:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:20,142 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2020-12-23 07:42:20,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2020-12-23 07:42:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:20,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:20,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:20,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:42:20,356 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash -188960243, now seen corresponding path program 1 times [2020-12-23 07:42:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:20,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002960202] [2020-12-23 07:42:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:20,381 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:20,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659293578] [2020-12-23 07:42:20,381 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002960202] [2020-12-23 07:42:20,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:20,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659293578] [2020-12-23 07:42:20,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:20,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:42:20,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788058882] [2020-12-23 07:42:20,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:42:20,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:20,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:42:20,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:20,658 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 12 states. [2020-12-23 07:42:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:21,306 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2020-12-23 07:42:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:42:21,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-12-23 07:42:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:21,309 INFO L225 Difference]: With dead ends: 363 [2020-12-23 07:42:21,309 INFO L226 Difference]: Without dead ends: 361 [2020-12-23 07:42:21,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:42:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-23 07:42:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 261. [2020-12-23 07:42:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:42:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2020-12-23 07:42:21,349 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 37 [2020-12-23 07:42:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:21,350 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2020-12-23 07:42:21,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:42:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2020-12-23 07:42:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:42:21,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:21,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:21,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:21,566 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2020-12-23 07:42:21,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:21,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962498800] [2020-12-23 07:42:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:21,577 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:21,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603399403] [2020-12-23 07:42:21,578 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:42:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:42:21,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962498800] [2020-12-23 07:42:21,693 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:21,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603399403] [2020-12-23 07:42:21,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:21,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960489157] [2020-12-23 07:42:21,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:21,695 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand 5 states. [2020-12-23 07:42:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:21,793 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-12-23 07:42:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:21,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:42:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:21,795 INFO L225 Difference]: With dead ends: 454 [2020-12-23 07:42:21,795 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 07:42:21,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:42:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 07:42:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2020-12-23 07:42:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:42:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 312 transitions. [2020-12-23 07:42:21,835 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 312 transitions. Word has length 38 [2020-12-23 07:42:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:21,836 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 312 transitions. [2020-12-23 07:42:21,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 312 transitions. [2020-12-23 07:42:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:42:21,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:21,837 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:22,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:42:22,051 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:22,051 INFO L82 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2020-12-23 07:42:22,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:22,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372144500] [2020-12-23 07:42:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:22,062 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:22,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687209260] [2020-12-23 07:42:22,063 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:22,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:42:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:42:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:42:22,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372144500] [2020-12-23 07:42:22,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:22,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687209260] [2020-12-23 07:42:22,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:22,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696491083] [2020-12-23 07:42:22,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:22,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:22,182 INFO L87 Difference]: Start difference. First operand 261 states and 312 transitions. Second operand 5 states. [2020-12-23 07:42:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:22,330 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2020-12-23 07:42:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:42:22,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:42:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:22,333 INFO L225 Difference]: With dead ends: 301 [2020-12-23 07:42:22,333 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 07:42:22,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 07:42:22,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2020-12-23 07:42:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 07:42:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 345 transitions. [2020-12-23 07:42:22,377 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 345 transitions. Word has length 38 [2020-12-23 07:42:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 345 transitions. [2020-12-23 07:42:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 345 transitions. [2020-12-23 07:42:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:42:22,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:22,378 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:22,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:42:22,594 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2091903451, now seen corresponding path program 1 times [2020-12-23 07:42:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:22,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337799645] [2020-12-23 07:42:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:22,605 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:22,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675610416] [2020-12-23 07:42:22,606 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:22,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:42:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337799645] [2020-12-23 07:42:23,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:23,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675610416] [2020-12-23 07:42:23,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:23,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 07:42:23,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601083564] [2020-12-23 07:42:23,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:42:23,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:42:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:42:23,046 INFO L87 Difference]: Start difference. First operand 288 states and 345 transitions. Second operand 15 states. [2020-12-23 07:42:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:25,639 INFO L93 Difference]: Finished difference Result 450 states and 519 transitions. [2020-12-23 07:42:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:42:25,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-23 07:42:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:25,641 INFO L225 Difference]: With dead ends: 450 [2020-12-23 07:42:25,641 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 07:42:25,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=578, Invalid=2178, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:42:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 07:42:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 382. [2020-12-23 07:42:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-12-23 07:42:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 470 transitions. [2020-12-23 07:42:25,714 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 470 transitions. Word has length 39 [2020-12-23 07:42:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:25,714 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 470 transitions. [2020-12-23 07:42:25,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:42:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 470 transitions. [2020-12-23 07:42:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:25,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:25,716 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:25,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:42:25,931 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:25,932 INFO L82 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2020-12-23 07:42:25,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:25,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358226358] [2020-12-23 07:42:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:25,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:25,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947501717] [2020-12-23 07:42:25,942 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:26,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 07:42:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358226358] [2020-12-23 07:42:26,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947501717] [2020-12-23 07:42:26,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:26,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 07:42:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75513019] [2020-12-23 07:42:26,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 07:42:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 07:42:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:42:26,916 INFO L87 Difference]: Start difference. First operand 382 states and 470 transitions. Second operand 20 states. [2020-12-23 07:42:27,415 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-23 07:42:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:28,453 INFO L93 Difference]: Finished difference Result 461 states and 553 transitions. [2020-12-23 07:42:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:42:28,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-23 07:42:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:28,456 INFO L225 Difference]: With dead ends: 461 [2020-12-23 07:42:28,456 INFO L226 Difference]: Without dead ends: 459 [2020-12-23 07:42:28,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:42:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-12-23 07:42:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 429. [2020-12-23 07:42:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-23 07:42:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 526 transitions. [2020-12-23 07:42:28,538 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 526 transitions. Word has length 41 [2020-12-23 07:42:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:28,539 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 526 transitions. [2020-12-23 07:42:28,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 07:42:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 526 transitions. [2020-12-23 07:42:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:28,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:28,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:28,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:28,753 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1404711062, now seen corresponding path program 1 times [2020-12-23 07:42:28,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:28,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772330647] [2020-12-23 07:42:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:28,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:28,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665966428] [2020-12-23 07:42:28,778 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:28,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 07:42:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772330647] [2020-12-23 07:42:29,827 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665966428] [2020-12-23 07:42:29,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:29,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 07:42:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888578929] [2020-12-23 07:42:29,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:42:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:42:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:29,829 INFO L87 Difference]: Start difference. First operand 429 states and 526 transitions. Second operand 19 states. [2020-12-23 07:42:30,302 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 07:42:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:31,235 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2020-12-23 07:42:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:42:31,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-23 07:42:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:31,239 INFO L225 Difference]: With dead ends: 535 [2020-12-23 07:42:31,239 INFO L226 Difference]: Without dead ends: 527 [2020-12-23 07:42:31,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:42:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-12-23 07:42:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 450. [2020-12-23 07:42:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-23 07:42:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 550 transitions. [2020-12-23 07:42:31,314 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 550 transitions. Word has length 41 [2020-12-23 07:42:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:31,314 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 550 transitions. [2020-12-23 07:42:31,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:42:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 550 transitions. [2020-12-23 07:42:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:31,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:31,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:31,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:31,529 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1278543847, now seen corresponding path program 2 times [2020-12-23 07:42:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:31,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289716189] [2020-12-23 07:42:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:31,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:31,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366088489] [2020-12-23 07:42:31,540 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:31,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:42:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:31,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289716189] [2020-12-23 07:42:31,805 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:31,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366088489] [2020-12-23 07:42:31,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:31,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:42:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960483657] [2020-12-23 07:42:31,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:42:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:42:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:42:31,807 INFO L87 Difference]: Start difference. First operand 450 states and 550 transitions. Second operand 11 states. [2020-12-23 07:42:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:32,605 INFO L93 Difference]: Finished difference Result 501 states and 605 transitions. [2020-12-23 07:42:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:42:32,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-23 07:42:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:32,609 INFO L225 Difference]: With dead ends: 501 [2020-12-23 07:42:32,609 INFO L226 Difference]: Without dead ends: 499 [2020-12-23 07:42:32,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:42:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-23 07:42:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 468. [2020-12-23 07:42:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-12-23 07:42:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 571 transitions. [2020-12-23 07:42:32,690 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 571 transitions. Word has length 41 [2020-12-23 07:42:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:32,691 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 571 transitions. [2020-12-23 07:42:32,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:42:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 571 transitions. [2020-12-23 07:42:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:42:32,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:32,692 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:32,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:42:32,906 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 2 times [2020-12-23 07:42:32,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:32,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473642142] [2020-12-23 07:42:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:32,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:32,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339829601] [2020-12-23 07:42:32,917 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:32,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 07:42:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:33,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473642142] [2020-12-23 07:42:33,768 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:33,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339829601] [2020-12-23 07:42:33,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:33,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:42:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169531227] [2020-12-23 07:42:33,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:42:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:42:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:33,770 INFO L87 Difference]: Start difference. First operand 468 states and 571 transitions. Second operand 17 states. [2020-12-23 07:42:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:35,365 INFO L93 Difference]: Finished difference Result 604 states and 722 transitions. [2020-12-23 07:42:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:42:35,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:42:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:35,369 INFO L225 Difference]: With dead ends: 604 [2020-12-23 07:42:35,369 INFO L226 Difference]: Without dead ends: 594 [2020-12-23 07:42:35,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:42:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-23 07:42:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 489. [2020-12-23 07:42:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-23 07:42:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 595 transitions. [2020-12-23 07:42:35,460 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 595 transitions. Word has length 46 [2020-12-23 07:42:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:35,460 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 595 transitions. [2020-12-23 07:42:35,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:42:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 595 transitions. [2020-12-23 07:42:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:42:35,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:35,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:35,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:42:35,676 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2102920060, now seen corresponding path program 2 times [2020-12-23 07:42:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:35,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321239492] [2020-12-23 07:42:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:35,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:35,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638480161] [2020-12-23 07:42:35,688 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:35,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:42:35,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:36,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321239492] [2020-12-23 07:42:36,191 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:36,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638480161] [2020-12-23 07:42:36,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:36,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:42:36,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876728510] [2020-12-23 07:42:36,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:42:36,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:36,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:42:36,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:36,193 INFO L87 Difference]: Start difference. First operand 489 states and 595 transitions. Second operand 17 states. [2020-12-23 07:42:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:43,510 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2020-12-23 07:42:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:42:43,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:42:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:43,514 INFO L225 Difference]: With dead ends: 633 [2020-12-23 07:42:43,514 INFO L226 Difference]: Without dead ends: 629 [2020-12-23 07:42:43,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:42:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-12-23 07:42:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 507. [2020-12-23 07:42:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-23 07:42:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 615 transitions. [2020-12-23 07:42:43,614 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 615 transitions. Word has length 46 [2020-12-23 07:42:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:43,615 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 615 transitions. [2020-12-23 07:42:43,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:42:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 615 transitions. [2020-12-23 07:42:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:42:43,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:43,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:43,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:43,831 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1437779966, now seen corresponding path program 1 times [2020-12-23 07:42:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:43,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111360019] [2020-12-23 07:42:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:43,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:43,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014419083] [2020-12-23 07:42:43,841 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:42:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111360019] [2020-12-23 07:42:44,173 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014419083] [2020-12-23 07:42:44,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:44,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:42:44,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103411514] [2020-12-23 07:42:44,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:42:44,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:44,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:42:44,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:44,175 INFO L87 Difference]: Start difference. First operand 507 states and 615 transitions. Second operand 13 states. [2020-12-23 07:42:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:45,244 INFO L93 Difference]: Finished difference Result 723 states and 875 transitions. [2020-12-23 07:42:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:42:45,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-23 07:42:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:45,249 INFO L225 Difference]: With dead ends: 723 [2020-12-23 07:42:45,250 INFO L226 Difference]: Without dead ends: 721 [2020-12-23 07:42:45,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:42:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-23 07:42:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 603. [2020-12-23 07:42:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-23 07:42:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 729 transitions. [2020-12-23 07:42:45,365 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 729 transitions. Word has length 49 [2020-12-23 07:42:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:45,365 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 729 transitions. [2020-12-23 07:42:45,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:42:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 729 transitions. [2020-12-23 07:42:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:42:45,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:45,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:45,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:42:45,583 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1323606593, now seen corresponding path program 3 times [2020-12-23 07:42:45,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:45,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35406520] [2020-12-23 07:42:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:45,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:45,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984025000] [2020-12-23 07:42:45,593 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:45,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:42:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 07:42:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:42:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35406520] [2020-12-23 07:42:46,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:46,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984025000] [2020-12-23 07:42:46,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:46,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:42:46,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288005178] [2020-12-23 07:42:46,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:42:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:42:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:46,025 INFO L87 Difference]: Start difference. First operand 603 states and 729 transitions. Second operand 12 states. [2020-12-23 07:42:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:50,936 INFO L93 Difference]: Finished difference Result 752 states and 897 transitions. [2020-12-23 07:42:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:42:50,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-12-23 07:42:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:50,952 INFO L225 Difference]: With dead ends: 752 [2020-12-23 07:42:50,953 INFO L226 Difference]: Without dead ends: 744 [2020-12-23 07:42:50,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:42:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-12-23 07:42:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 620. [2020-12-23 07:42:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-12-23 07:42:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 748 transitions. [2020-12-23 07:42:51,078 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 748 transitions. Word has length 50 [2020-12-23 07:42:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 748 transitions. [2020-12-23 07:42:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:42:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 748 transitions. [2020-12-23 07:42:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:42:51,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:51,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:51,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,292 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1449773808, now seen corresponding path program 3 times [2020-12-23 07:42:51,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:51,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726658516] [2020-12-23 07:42:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:51,301 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:51,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606961905] [2020-12-23 07:42:51,301 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:42:51,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:42:51,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:42:53,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726658516] [2020-12-23 07:42:53,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:53,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606961905] [2020-12-23 07:42:53,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:53,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:53,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711973693] [2020-12-23 07:42:53,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2020-12-23 07:42:53,582 INFO L87 Difference]: Start difference. First operand 620 states and 748 transitions. Second operand 8 states. [2020-12-23 07:44:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:44:37,793 INFO L93 Difference]: Finished difference Result 630 states and 753 transitions. [2020-12-23 07:44:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:44:37,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-12-23 07:44:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:44:37,817 INFO L225 Difference]: With dead ends: 630 [2020-12-23 07:44:37,817 INFO L226 Difference]: Without dead ends: 628 [2020-12-23 07:44:37,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=73, Invalid=179, Unknown=20, NotChecked=0, Total=272 [2020-12-23 07:44:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-12-23 07:44:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 443. [2020-12-23 07:44:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 07:44:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 529 transitions. [2020-12-23 07:44:37,924 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 529 transitions. Word has length 50 [2020-12-23 07:44:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:44:37,924 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 529 transitions. [2020-12-23 07:44:37,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:44:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 529 transitions. [2020-12-23 07:44:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:44:37,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:37,925 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:44:38,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:44:38,126 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:44:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash 272025232, now seen corresponding path program 2 times [2020-12-23 07:44:38,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:38,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749144849] [2020-12-23 07:44:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:38,139 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:44:38,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857674319] [2020-12-23 07:44:38,139 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:44:38,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:44:38,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:44:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:44:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:44:38,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749144849] [2020-12-23 07:44:38,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:44:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857674319] [2020-12-23 07:44:38,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:44:38,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:44:38,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:44:38,972 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:44:38,973 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:44:39,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:44:39,229 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:44:39,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:44:39 BoogieIcfgContainer [2020-12-23 07:44:39,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:44:39,230 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:44:39,230 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:44:39,231 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:44:39,231 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:09" (3/4) ... [2020-12-23 07:44:39,235 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:44:39,235 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:44:39,239 INFO L168 Benchmark]: Toolchain (without parser) took 150962.04 ms. Allocated memory was 155.2 MB in the beginning and 272.6 MB in the end (delta: 117.4 MB). Free memory was 130.2 MB in the beginning and 245.5 MB in the end (delta: -115.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,240 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:44:39,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.02 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 119.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.42 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,244 INFO L168 Benchmark]: Boogie Preprocessor took 40.84 ms. Allocated memory is still 155.2 MB. Free memory was 117.6 MB in the beginning and 116.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,245 INFO L168 Benchmark]: RCFGBuilder took 741.50 ms. Allocated memory is still 155.2 MB. Free memory was 116.3 MB in the beginning and 132.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,245 INFO L168 Benchmark]: TraceAbstraction took 149786.15 ms. Allocated memory was 155.2 MB in the beginning and 272.6 MB in the end (delta: 117.4 MB). Free memory was 132.2 MB in the beginning and 246.0 MB in the end (delta: -113.8 MB). Peak memory consumption was 160.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:39,246 INFO L168 Benchmark]: Witness Printer took 5.22 ms. Allocated memory is still 272.6 MB. Free memory was 246.0 MB in the beginning and 245.5 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:44:39,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.02 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 119.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.42 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 117.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.84 ms. Allocated memory is still 155.2 MB. Free memory was 117.6 MB in the beginning and 116.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 741.50 ms. Allocated memory is still 155.2 MB. Free memory was 116.3 MB in the beginning and 132.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 149786.15 ms. Allocated memory was 155.2 MB in the beginning and 272.6 MB in the end (delta: 117.4 MB). Free memory was 132.2 MB in the beginning and 246.0 MB in the end (delta: -113.8 MB). Peak memory consumption was 160.4 MB. Max. memory is 8.0 GB. * Witness Printer took 5.22 ms. Allocated memory is still 272.6 MB. Free memory was 246.0 MB in the beginning and 245.5 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: 13]: 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: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 149.6s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 130.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 990 SDtfs, 4123 SDslu, 4124 SDs, 0 SdLazy, 5855 SolverSat, 716 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 77.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1073 GetRequests, 620 SyntacticMatches, 4 SemanticMatches, 449 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 55.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=620occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 1558 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 845 NumberOfCodeBlocks, 792 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 819 ConstructedInterpolants, 0 QuantifiedInterpolants, 342858 SizeOfPredicates, 322 NumberOfNonLiveVariables, 3338 ConjunctsInSsa, 833 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 86/340 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...