/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:42:28,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:42:28,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:42:28,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:42:28,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:42:28,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:42:28,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:42:28,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:42:28,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:42:28,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:42:28,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:42:28,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:42:28,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:42:28,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:42:28,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:42:28,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:42:28,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:42:28,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:42:28,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:42:28,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:42:28,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:42:28,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:42:28,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:42:28,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:42:28,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:42:28,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:42:28,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:42:28,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:42:28,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:42:28,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:42:28,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:42:28,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:42:28,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:42:28,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:42:28,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:42:28,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:42:28,935 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 07:42:28,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:42:28,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:42:28,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:42:28,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:42:28,987 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:42:28,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:42:28,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:42:28,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:42:28,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:42:28,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:42:28,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:42:28,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:42:28,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:42:28,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:42:28,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:42:28,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:42:28,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:42:28,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:42:28,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:42:28,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:42:28,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:42:28,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:42:28,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:42:28,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:42:28,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:42:28,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:42:29,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:42:29,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:42:29,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:42:29,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:42:29,473 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:42:29,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2020-12-23 07:42:29,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/647395419/c4dc3e8b533a48e4a4fb420df0e6e95c/FLAG7cabe124a [2020-12-23 07:42:30,271 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:42:30,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2020-12-23 07:42:30,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/647395419/c4dc3e8b533a48e4a4fb420df0e6e95c/FLAG7cabe124a [2020-12-23 07:42:30,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/647395419/c4dc3e8b533a48e4a4fb420df0e6e95c [2020-12-23 07:42:30,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:42:30,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:42:30,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:30,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:42:30,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:42:30,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3953ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30, skipping insertion in model container [2020-12-23 07:42:30,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:42:30,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:42:30,761 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_valuebound20.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 07:42:30,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:30,798 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:42:30,810 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_valuebound20.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 07:42:30,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:30,837 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:42:30,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30 WrapperNode [2020-12-23 07:42:30,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:30,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:30,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:42:30,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:42:30,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:30,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:42:30,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:42:30,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:42:30,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (1/1) ... [2020-12-23 07:42:30,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:42:30,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:42:30,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:42:30,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:42:30,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (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 07:42:31,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:42:31,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:42:31,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:42:31,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:42:31,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:42:31,498 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-23 07:42:31,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:31 BoogieIcfgContainer [2020-12-23 07:42:31,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:42:31,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:42:31,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:42:31,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:42:31,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:42:30" (1/3) ... [2020-12-23 07:42:31,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d537e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:31, skipping insertion in model container [2020-12-23 07:42:31,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:30" (2/3) ... [2020-12-23 07:42:31,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d537e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:31, skipping insertion in model container [2020-12-23 07:42:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:31" (3/3) ... [2020-12-23 07:42:31,512 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2020-12-23 07:42:31,520 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:42:31,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 07:42:31,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 07:42:31,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:42:31,586 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:42:31,586 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:42:31,586 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:42:31,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:42:31,586 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:42:31,587 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:42:31,587 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:42:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-23 07:42:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:42:31,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:31,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:31,635 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 07:42:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:31,651 INFO L82 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2020-12-23 07:42:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:31,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680722863] [2020-12-23 07:42:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:31,920 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 07:42:31,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680722863] [2020-12-23 07:42:31,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:31,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:42:31,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955235643] [2020-12-23 07:42:31,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:42:31,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:42:31,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:42:31,958 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-23 07:42:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:32,007 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2020-12-23 07:42:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:42:32,009 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 07:42:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:32,021 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:42:32,022 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:42:32,027 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 07:42:32,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:42:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:42:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:42:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 07:42:32,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2020-12-23 07:42:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:32,085 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 07:42:32,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:42:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 07:42:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:42:32,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:32,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:32,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:42:32,088 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 07:42:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2020-12-23 07:42:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:32,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188681390] [2020-12-23 07:42:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:32,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:32,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474862435] [2020-12-23 07:42:32,153 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 07:42:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:42:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:32,376 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 07:42:32,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188681390] [2020-12-23 07:42:32,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:32,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474862435] [2020-12-23 07:42:32,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:32,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207438807] [2020-12-23 07:42:32,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:32,381 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-12-23 07:42:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:32,526 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-23 07:42:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:42:32,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:42:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:32,529 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:42:32,529 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:42:32,530 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 07:42:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:42:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-12-23 07:42:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:42:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 07:42:32,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2020-12-23 07:42:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:32,540 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 07:42:32,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 07:42:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:42:32,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:32,541 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 07:42:32,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:42:32,756 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 07:42:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2020-12-23 07:42:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:32,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737460977] [2020-12-23 07:42:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:32,779 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:32,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903121119] [2020-12-23 07:42:32,780 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 07:42:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:32,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:33,118 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 07:42:33,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737460977] [2020-12-23 07:42:33,119 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:33,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903121119] [2020-12-23 07:42:33,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:33,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 07:42:33,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513844801] [2020-12-23 07:42:33,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:42:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:42:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:42:33,121 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-12-23 07:42:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:33,515 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-12-23 07:42:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:33,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 07:42:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:33,520 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:42:33,521 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:42:33,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:42:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:42:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-23 07:42:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-23 07:42:33,549 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2020-12-23 07:42:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:33,550 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-23 07:42:33,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:42:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-23 07:42:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:42:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:33,552 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 07:42:33,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:33,769 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 07:42:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2020-12-23 07:42:33,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:33,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192147557] [2020-12-23 07:42:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:33,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:33,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486078310] [2020-12-23 07:42:33,792 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 07:42:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:42:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:34,004 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 07:42:34,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192147557] [2020-12-23 07:42:34,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:34,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486078310] [2020-12-23 07:42:34,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:34,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153822809] [2020-12-23 07:42:34,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:34,008 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-12-23 07:42:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:34,286 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 07:42:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:34,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 07:42:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:34,288 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:42:34,288 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:42:34,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:42:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-23 07:42:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-23 07:42:34,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2020-12-23 07:42:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:34,297 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-23 07:42:34,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-23 07:42:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:42:34,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:34,299 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 07:42:34,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:34,514 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 07:42:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2020-12-23 07:42:34,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:34,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681671004] [2020-12-23 07:42:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:34,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:34,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435231620] [2020-12-23 07:42:34,545 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 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 07:42:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:42:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:34,663 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 07:42:34,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681671004] [2020-12-23 07:42:34,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:34,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435231620] [2020-12-23 07:42:34,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:34,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:42:34,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269727831] [2020-12-23 07:42:34,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:42:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:42:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:34,667 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-12-23 07:42:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:34,876 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-12-23 07:42:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:34,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 07:42:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:34,878 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:42:34,878 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:42:34,879 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 07:42:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:42:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2020-12-23 07:42:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:42:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-12-23 07:42:34,892 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2020-12-23 07:42:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:34,893 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-12-23 07:42:34,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:42:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-12-23 07:42:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:42:34,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:34,894 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 07:42:35,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:35,108 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 07:42:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2020-12-23 07:42:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:35,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163792255] [2020-12-23 07:42:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:35,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:35,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48225545] [2020-12-23 07:42:35,137 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 07:42:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:42:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:35,290 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 07:42:35,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163792255] [2020-12-23 07:42:35,291 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:35,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48225545] [2020-12-23 07:42:35,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:35,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238480751] [2020-12-23 07:42:35,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:35,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:35,294 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2020-12-23 07:42:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:35,535 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-12-23 07:42:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:42:35,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 07:42:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:35,537 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:42:35,537 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:42:35,538 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 07:42:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:42:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-12-23 07:42:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:42:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-12-23 07:42:35,552 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2020-12-23 07:42:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:35,552 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-12-23 07:42:35,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-12-23 07:42:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:42:35,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:35,554 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 07:42:35,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:42:35,768 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 07:42:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2020-12-23 07:42:35,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:35,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249699099] [2020-12-23 07:42:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:35,786 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:35,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832651272] [2020-12-23 07:42:35,786 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 07:42:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:42:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:35,980 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 07:42:35,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249699099] [2020-12-23 07:42:35,981 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:35,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832651272] [2020-12-23 07:42:35,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:35,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72620464] [2020-12-23 07:42:35,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:35,984 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-12-23 07:42:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:36,211 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-12-23 07:42:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:36,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:42:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:36,213 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:42:36,213 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 07:42:36,213 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 07:42:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 07:42:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2020-12-23 07:42:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:42:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-12-23 07:42:36,232 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 22 [2020-12-23 07:42:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:36,233 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-12-23 07:42:36,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-12-23 07:42:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:42:36,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:36,234 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 07:42:36,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:36,449 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 07:42:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2020-12-23 07:42:36,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:36,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781315603] [2020-12-23 07:42:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:36,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:36,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259854367] [2020-12-23 07:42:36,466 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 07:42:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:42:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:36,572 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 07:42:36,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781315603] [2020-12-23 07:42:36,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:36,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259854367] [2020-12-23 07:42:36,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:36,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:36,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708567100] [2020-12-23 07:42:36,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:36,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:36,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:36,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:36,575 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 5 states. [2020-12-23 07:42:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:36,707 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-12-23 07:42:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:36,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 07:42:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:36,711 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:42:36,712 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 07:42:36,712 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 07:42:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 07:42:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2020-12-23 07:42:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2020-12-23 07:42:36,744 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 23 [2020-12-23 07:42:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2020-12-23 07:42:36,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2020-12-23 07:42:36,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:42:36,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:36,752 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 07:42:36,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:36,960 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 07:42:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2020-12-23 07:42:36,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:36,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186682947] [2020-12-23 07:42:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:36,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:36,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336166319] [2020-12-23 07:42:36,991 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 07:42:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:42:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:37,186 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 07:42:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186682947] [2020-12-23 07:42:37,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336166319] [2020-12-23 07:42:37,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:37,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707358374] [2020-12-23 07:42:37,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:37,190 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand 8 states. [2020-12-23 07:42:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:37,478 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-12-23 07:42:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:37,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 07:42:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:37,480 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:42:37,480 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:42:37,481 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 07:42:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:42:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2020-12-23 07:42:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-12-23 07:42:37,503 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 24 [2020-12-23 07:42:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:37,504 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-12-23 07:42:37,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-12-23 07:42:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:42:37,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:37,505 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 07:42:37,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:42:37,719 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 07:42:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash 151041369, now seen corresponding path program 1 times [2020-12-23 07:42:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:37,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866641670] [2020-12-23 07:42:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:37,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:37,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176198831] [2020-12-23 07:42:37,735 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 07:42:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:42:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:37,937 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 07:42:37,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866641670] [2020-12-23 07:42:37,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:37,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176198831] [2020-12-23 07:42:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:37,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:42:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876391903] [2020-12-23 07:42:37,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:42:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:42:37,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:42:37,941 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 11 states. [2020-12-23 07:42:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:38,344 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-12-23 07:42:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:42:38,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 07:42:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:38,346 INFO L225 Difference]: With dead ends: 277 [2020-12-23 07:42:38,347 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 07:42:38,347 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 07:42:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 07:42:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 198. [2020-12-23 07:42:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:42:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-12-23 07:42:38,371 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 26 [2020-12-23 07:42:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:38,372 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-12-23 07:42:38,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:42:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-12-23 07:42:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:42:38,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:38,373 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 07:42:38,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:38,587 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 07:42:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:38,588 INFO L82 PathProgramCache]: Analyzing trace with hash -74821968, now seen corresponding path program 2 times [2020-12-23 07:42:38,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:38,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719418093] [2020-12-23 07:42:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:38,601 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:38,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421115055] [2020-12-23 07:42:38,602 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 07:42:38,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:42:38,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:38,706 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 07:42:38,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719418093] [2020-12-23 07:42:38,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:38,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421115055] [2020-12-23 07:42:38,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:38,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:38,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180614577] [2020-12-23 07:42:38,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:38,710 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 5 states. [2020-12-23 07:42:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:38,820 INFO L93 Difference]: Finished difference Result 291 states and 355 transitions. [2020-12-23 07:42:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:38,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 07:42:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:38,822 INFO L225 Difference]: With dead ends: 291 [2020-12-23 07:42:38,822 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:38,823 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 07:42:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2020-12-23 07:42:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:42:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2020-12-23 07:42:38,846 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 27 [2020-12-23 07:42:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:38,847 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2020-12-23 07:42:38,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2020-12-23 07:42:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:38,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:38,848 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 07:42:39,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:39,062 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 07:42:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2020-12-23 07:42:39,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:39,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328360712] [2020-12-23 07:42:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:39,077 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:39,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290488821] [2020-12-23 07:42:39,077 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 07:42:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:42:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:39,532 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 07:42:39,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328360712] [2020-12-23 07:42:39,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:39,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290488821] [2020-12-23 07:42:39,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:39,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:42:39,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40983565] [2020-12-23 07:42:39,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:42:39,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:42:39,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:39,535 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 13 states. [2020-12-23 07:42:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:40,308 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2020-12-23 07:42:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:42:40,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 07:42:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:40,310 INFO L225 Difference]: With dead ends: 282 [2020-12-23 07:42:40,311 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 07:42:40,312 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 07:42:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 07:42:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2020-12-23 07:42:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2020-12-23 07:42:40,334 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 32 [2020-12-23 07:42:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:40,334 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2020-12-23 07:42:40,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:42:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2020-12-23 07:42:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:40,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:40,335 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 07:42:40,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:42:40,545 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 07:42:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2020-12-23 07:42:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:40,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623644271] [2020-12-23 07:42:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:40,579 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:40,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680763142] [2020-12-23 07:42:40,580 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 07:42:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:42:40,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:40,758 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 07:42:40,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623644271] [2020-12-23 07:42:40,759 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:40,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680763142] [2020-12-23 07:42:40,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:40,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:40,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550760407] [2020-12-23 07:42:40,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:40,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:40,761 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 9 states. [2020-12-23 07:42:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:41,175 INFO L93 Difference]: Finished difference Result 211 states and 244 transitions. [2020-12-23 07:42:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:41,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-23 07:42:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:41,177 INFO L225 Difference]: With dead ends: 211 [2020-12-23 07:42:41,177 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:41,178 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 07:42:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2020-12-23 07:42:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:42:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2020-12-23 07:42:41,201 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 32 [2020-12-23 07:42:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:41,202 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2020-12-23 07:42:41,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2020-12-23 07:42:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:41,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:41,203 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 07:42:41,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:42:41,417 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 07:42:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash -315127458, now seen corresponding path program 2 times [2020-12-23 07:42:41,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:41,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560060177] [2020-12-23 07:42:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:41,431 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:41,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881509994] [2020-12-23 07:42:41,432 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 07:42:41,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:42:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:41,575 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 07:42:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560060177] [2020-12-23 07:42:41,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:41,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881509994] [2020-12-23 07:42:41,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:41,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:41,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661130499] [2020-12-23 07:42:41,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:41,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:41,578 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand 8 states. [2020-12-23 07:42:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:41,944 INFO L93 Difference]: Finished difference Result 402 states and 471 transitions. [2020-12-23 07:42:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:42:41,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 07:42:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:41,947 INFO L225 Difference]: With dead ends: 402 [2020-12-23 07:42:41,947 INFO L226 Difference]: Without dead ends: 398 [2020-12-23 07:42:41,948 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 07:42:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-23 07:42:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 221. [2020-12-23 07:42:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:42:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2020-12-23 07:42:41,982 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 37 [2020-12-23 07:42:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:41,982 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2020-12-23 07:42:41,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2020-12-23 07:42:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:41,983 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 07:42:42,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:42:42,197 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 07:42:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -188960243, now seen corresponding path program 1 times [2020-12-23 07:42:42,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:42,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269511517] [2020-12-23 07:42:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:42,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:42,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537953162] [2020-12-23 07:42:42,210 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 07:42:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:42,465 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 07:42:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269511517] [2020-12-23 07:42:42,465 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537953162] [2020-12-23 07:42:42,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:42,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:42:42,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715096575] [2020-12-23 07:42:42,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:42:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:42:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:42,468 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 12 states. [2020-12-23 07:42:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:43,074 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2020-12-23 07:42:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:42:43,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-12-23 07:42:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:43,077 INFO L225 Difference]: With dead ends: 363 [2020-12-23 07:42:43,077 INFO L226 Difference]: Without dead ends: 361 [2020-12-23 07:42:43,078 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 07:42:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-23 07:42:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 261. [2020-12-23 07:42:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:42:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2020-12-23 07:42:43,131 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 37 [2020-12-23 07:42:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:43,131 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2020-12-23 07:42:43,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:42:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2020-12-23 07:42:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:42:43,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:43,132 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 07:42:43,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:43,348 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 07:42:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2020-12-23 07:42:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:43,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253852491] [2020-12-23 07:42:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:43,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:43,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027108635] [2020-12-23 07:42:43,362 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 07:42:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:42:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:43,473 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 07:42:43,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253852491] [2020-12-23 07:42:43,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:43,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027108635] [2020-12-23 07:42:43,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:43,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152811998] [2020-12-23 07:42:43,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:43,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:43,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:43,475 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand 5 states. [2020-12-23 07:42:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:43,567 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-12-23 07:42:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:43,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:42:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:43,569 INFO L225 Difference]: With dead ends: 454 [2020-12-23 07:42:43,570 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 07:42:43,571 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 07:42:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 07:42:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2020-12-23 07:42:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:42:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 312 transitions. [2020-12-23 07:42:43,607 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 312 transitions. Word has length 38 [2020-12-23 07:42:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:43,608 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 312 transitions. [2020-12-23 07:42:43,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 312 transitions. [2020-12-23 07:42:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:42:43,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:43,609 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 07:42:43,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:42:43,823 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 07:42:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2020-12-23 07:42:43,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:43,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545316183] [2020-12-23 07:42:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:43,834 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:43,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815705250] [2020-12-23 07:42:43,835 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 07:42:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:42:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:42:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:43,949 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 07:42:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545316183] [2020-12-23 07:42:43,949 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815705250] [2020-12-23 07:42:43,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730961607] [2020-12-23 07:42:43,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:43,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:43,951 INFO L87 Difference]: Start difference. First operand 261 states and 312 transitions. Second operand 5 states. [2020-12-23 07:42:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:44,080 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2020-12-23 07:42:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:42:44,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:42:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:44,083 INFO L225 Difference]: With dead ends: 301 [2020-12-23 07:42:44,083 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 07:42:44,083 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 07:42:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 07:42:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2020-12-23 07:42:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 07:42:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 345 transitions. [2020-12-23 07:42:44,143 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 345 transitions. Word has length 38 [2020-12-23 07:42:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:44,143 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 345 transitions. [2020-12-23 07:42:44,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 345 transitions. [2020-12-23 07:42:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:42:44,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:44,144 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 07:42:44,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:42:44,358 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 07:42:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2091903451, now seen corresponding path program 1 times [2020-12-23 07:42:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:44,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938064542] [2020-12-23 07:42:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:44,369 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:44,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448420732] [2020-12-23 07:42:44,370 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 07:42:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:42:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:44,836 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 07:42:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938064542] [2020-12-23 07:42:44,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448420732] [2020-12-23 07:42:44,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:44,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 07:42:44,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255623455] [2020-12-23 07:42:44,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:42:44,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:42:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:42:44,841 INFO L87 Difference]: Start difference. First operand 288 states and 345 transitions. Second operand 15 states. [2020-12-23 07:42:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:47,965 INFO L93 Difference]: Finished difference Result 450 states and 519 transitions. [2020-12-23 07:42:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:42:47,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-23 07:42:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:47,968 INFO L225 Difference]: With dead ends: 450 [2020-12-23 07:42:47,968 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 07:42:47,970 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 07:42:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 07:42:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 382. [2020-12-23 07:42:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-12-23 07:42:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 470 transitions. [2020-12-23 07:42:48,030 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 470 transitions. Word has length 39 [2020-12-23 07:42:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:48,030 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 470 transitions. [2020-12-23 07:42:48,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:42:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 470 transitions. [2020-12-23 07:42:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:48,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:48,031 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 07:42:48,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:42:48,245 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 07:42:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:48,246 INFO L82 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2020-12-23 07:42:48,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:48,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219769690] [2020-12-23 07:42:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:48,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:48,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105632034] [2020-12-23 07:42:48,256 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 07:42:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 07:42:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:49,066 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 07:42:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219769690] [2020-12-23 07:42:49,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:49,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105632034] [2020-12-23 07:42:49,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:49,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 07:42:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097253007] [2020-12-23 07:42:49,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:42:49,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:42:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:42:49,069 INFO L87 Difference]: Start difference. First operand 382 states and 470 transitions. Second operand 18 states. [2020-12-23 07:42:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:50,581 INFO L93 Difference]: Finished difference Result 461 states and 553 transitions. [2020-12-23 07:42:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:42:50,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-12-23 07:42:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:50,585 INFO L225 Difference]: With dead ends: 461 [2020-12-23 07:42:50,585 INFO L226 Difference]: Without dead ends: 459 [2020-12-23 07:42:50,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:42:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-12-23 07:42:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 429. [2020-12-23 07:42:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-23 07:42:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 526 transitions. [2020-12-23 07:42:50,658 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 526 transitions. Word has length 41 [2020-12-23 07:42:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:50,658 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 526 transitions. [2020-12-23 07:42:50,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:42:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 526 transitions. [2020-12-23 07:42:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:50,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:50,660 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 07:42:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:50,874 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 07:42:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1404711062, now seen corresponding path program 1 times [2020-12-23 07:42:50,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:50,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494238366] [2020-12-23 07:42:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:50,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685653529] [2020-12-23 07:42:50,899 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 07:42:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:50,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:42:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:51,887 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 07:42:51,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494238366] [2020-12-23 07:42:51,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:51,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685653529] [2020-12-23 07:42:51,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:51,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 07:42:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600819349] [2020-12-23 07:42:51,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:42:51,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:42:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:51,890 INFO L87 Difference]: Start difference. First operand 429 states and 526 transitions. Second operand 19 states. [2020-12-23 07:42:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:53,287 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2020-12-23 07:42:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:42:53,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-23 07:42:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:53,290 INFO L225 Difference]: With dead ends: 535 [2020-12-23 07:42:53,290 INFO L226 Difference]: Without dead ends: 527 [2020-12-23 07:42:53,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:42:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-12-23 07:42:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 450. [2020-12-23 07:42:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-23 07:42:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 550 transitions. [2020-12-23 07:42:53,364 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 550 transitions. Word has length 41 [2020-12-23 07:42:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:53,365 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 550 transitions. [2020-12-23 07:42:53,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:42:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 550 transitions. [2020-12-23 07:42:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:42:53,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:53,366 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 07:42:53,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:53,581 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 07:42:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1278543847, now seen corresponding path program 2 times [2020-12-23 07:42:53,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:53,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375862776] [2020-12-23 07:42:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:53,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:53,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346615591] [2020-12-23 07:42:53,593 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 07:42:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:53,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:42:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:53,843 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 07:42:53,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375862776] [2020-12-23 07:42:53,844 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:53,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346615591] [2020-12-23 07:42:53,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:53,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:42:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175087433] [2020-12-23 07:42:53,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:42:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:42:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:42:53,845 INFO L87 Difference]: Start difference. First operand 450 states and 550 transitions. Second operand 11 states. [2020-12-23 07:42:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:54,627 INFO L93 Difference]: Finished difference Result 501 states and 605 transitions. [2020-12-23 07:42:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:42:54,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-23 07:42:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:54,631 INFO L225 Difference]: With dead ends: 501 [2020-12-23 07:42:54,631 INFO L226 Difference]: Without dead ends: 499 [2020-12-23 07:42:54,632 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 07:42:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-23 07:42:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 468. [2020-12-23 07:42:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-12-23 07:42:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 571 transitions. [2020-12-23 07:42:54,713 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 571 transitions. Word has length 41 [2020-12-23 07:42:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:54,713 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 571 transitions. [2020-12-23 07:42:54,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:42:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 571 transitions. [2020-12-23 07:42:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:42:54,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:54,714 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 07:42:54,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:42:54,928 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 07:42:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 2 times [2020-12-23 07:42:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:54,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972197663] [2020-12-23 07:42:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:54,943 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:54,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708117525] [2020-12-23 07:42:54,945 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 07:42:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:55,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 07:42:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:55,752 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 07:42:55,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972197663] [2020-12-23 07:42:55,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:55,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708117525] [2020-12-23 07:42:55,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:55,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:42:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572733359] [2020-12-23 07:42:55,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:42:55,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:42:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:55,754 INFO L87 Difference]: Start difference. First operand 468 states and 571 transitions. Second operand 17 states. [2020-12-23 07:42:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:57,359 INFO L93 Difference]: Finished difference Result 604 states and 722 transitions. [2020-12-23 07:42:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:42:57,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:42:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:57,368 INFO L225 Difference]: With dead ends: 604 [2020-12-23 07:42:57,368 INFO L226 Difference]: Without dead ends: 594 [2020-12-23 07:42:57,369 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 07:42:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-23 07:42:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 489. [2020-12-23 07:42:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-23 07:42:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 595 transitions. [2020-12-23 07:42:57,451 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 595 transitions. Word has length 46 [2020-12-23 07:42:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:57,452 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 595 transitions. [2020-12-23 07:42:57,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:42:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 595 transitions. [2020-12-23 07:42:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:42:57,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:57,453 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 07:42:57,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:42:57,666 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 07:42:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2102920060, now seen corresponding path program 2 times [2020-12-23 07:42:57,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:57,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514575658] [2020-12-23 07:42:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:57,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:57,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382124968] [2020-12-23 07:42:57,685 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 07:42:57,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:57,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:42:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:58,224 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 07:42:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514575658] [2020-12-23 07:42:58,225 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382124968] [2020-12-23 07:42:58,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:58,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:42:58,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114517024] [2020-12-23 07:42:58,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:42:58,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:58,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:42:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:58,226 INFO L87 Difference]: Start difference. First operand 489 states and 595 transitions. Second operand 17 states. [2020-12-23 07:43:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:05,492 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2020-12-23 07:43:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:43:05,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:43:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:05,497 INFO L225 Difference]: With dead ends: 633 [2020-12-23 07:43:05,497 INFO L226 Difference]: Without dead ends: 629 [2020-12-23 07:43:05,498 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 07:43:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-12-23 07:43:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 507. [2020-12-23 07:43:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-23 07:43:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 615 transitions. [2020-12-23 07:43:05,604 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 615 transitions. Word has length 46 [2020-12-23 07:43:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:05,604 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 615 transitions. [2020-12-23 07:43:05,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:43:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 615 transitions. [2020-12-23 07:43:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:43:05,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:05,606 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 07:43:05,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:05,818 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 07:43:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1437779966, now seen corresponding path program 1 times [2020-12-23 07:43:05,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:05,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413486043] [2020-12-23 07:43:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:05,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:05,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423949276] [2020-12-23 07:43:05,829 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 07:43:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:43:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:06,124 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 07:43:06,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413486043] [2020-12-23 07:43:06,125 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:06,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423949276] [2020-12-23 07:43:06,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:06,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:43:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609520375] [2020-12-23 07:43:06,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:43:06,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:43:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:43:06,127 INFO L87 Difference]: Start difference. First operand 507 states and 615 transitions. Second operand 13 states. [2020-12-23 07:43:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:07,165 INFO L93 Difference]: Finished difference Result 723 states and 875 transitions. [2020-12-23 07:43:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:43:07,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-23 07:43:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:07,170 INFO L225 Difference]: With dead ends: 723 [2020-12-23 07:43:07,170 INFO L226 Difference]: Without dead ends: 721 [2020-12-23 07:43:07,171 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 07:43:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-23 07:43:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 603. [2020-12-23 07:43:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-23 07:43:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 729 transitions. [2020-12-23 07:43:07,272 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 729 transitions. Word has length 49 [2020-12-23 07:43:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:07,273 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 729 transitions. [2020-12-23 07:43:07,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:43:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 729 transitions. [2020-12-23 07:43:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:43:07,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:07,274 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 07:43:07,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:43:07,490 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 07:43:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1323606593, now seen corresponding path program 3 times [2020-12-23 07:43:07,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:07,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572102672] [2020-12-23 07:43:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:07,500 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:07,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063390092] [2020-12-23 07:43:07,501 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 07:43:07,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:43:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 07:43:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:07,902 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 07:43:07,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572102672] [2020-12-23 07:43:07,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:07,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063390092] [2020-12-23 07:43:07,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:07,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:43:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163527131] [2020-12-23 07:43:07,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:43:07,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:43:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:43:07,904 INFO L87 Difference]: Start difference. First operand 603 states and 729 transitions. Second operand 12 states. [2020-12-23 07:43:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:12,826 INFO L93 Difference]: Finished difference Result 752 states and 897 transitions. [2020-12-23 07:43:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:43:12,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-12-23 07:43:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:12,830 INFO L225 Difference]: With dead ends: 752 [2020-12-23 07:43:12,831 INFO L226 Difference]: Without dead ends: 744 [2020-12-23 07:43:12,831 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 07:43:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-12-23 07:43:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 620. [2020-12-23 07:43:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-12-23 07:43:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 748 transitions. [2020-12-23 07:43:12,957 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 748 transitions. Word has length 50 [2020-12-23 07:43:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:12,957 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 748 transitions. [2020-12-23 07:43:12,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:43:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 748 transitions. [2020-12-23 07:43:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:43:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:12,958 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 07:43:13,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:13,172 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 07:43:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1449773808, now seen corresponding path program 3 times [2020-12-23 07:43:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:13,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223512523] [2020-12-23 07:43:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:13,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:13,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532770672] [2020-12-23 07:43:13,188 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 07:43:13,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:43:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:43:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:15,672 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 07:43:15,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223512523] [2020-12-23 07:43:15,673 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:15,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532770672] [2020-12-23 07:43:15,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:15,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:43:15,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629847902] [2020-12-23 07:43:15,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:43:15,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:43:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2020-12-23 07:43:15,674 INFO L87 Difference]: Start difference. First operand 620 states and 748 transitions. Second operand 8 states. [2020-12-23 07:44:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:44:54,258 INFO L93 Difference]: Finished difference Result 630 states and 753 transitions. [2020-12-23 07:44:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:44:54,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-12-23 07:44:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:44:54,278 INFO L225 Difference]: With dead ends: 630 [2020-12-23 07:44:54,278 INFO L226 Difference]: Without dead ends: 628 [2020-12-23 07:44:54,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=73, Invalid=180, Unknown=19, NotChecked=0, Total=272 [2020-12-23 07:44:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-12-23 07:44:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 443. [2020-12-23 07:44:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 07:44:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 529 transitions. [2020-12-23 07:44:54,372 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 529 transitions. Word has length 50 [2020-12-23 07:44:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:44:54,372 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 529 transitions. [2020-12-23 07:44:54,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:44:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 529 transitions. [2020-12-23 07:44:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:44:54,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:54,373 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 07:44:54,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:44:54,574 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 07:44:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash 272025232, now seen corresponding path program 2 times [2020-12-23 07:44:54,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:54,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005882754] [2020-12-23 07:44:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:54,583 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:44:54,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855193669] [2020-12-23 07:44:54,583 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 07:44:54,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:44:54,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:44:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:44:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:44:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005882754] [2020-12-23 07:44:55,273 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:44:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855193669] [2020-12-23 07:44:55,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:44:55,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:44:55,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:44:55,274 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:44:55,274 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:44:55,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:44:55,525 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:44:55,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:44:55 BoogieIcfgContainer [2020-12-23 07:44:55,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:44:55,526 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:44:55,526 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:44:55,526 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:44:55,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:31" (3/4) ... [2020-12-23 07:44:55,530 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:44:55,530 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:44:55,532 INFO L168 Benchmark]: Toolchain (without parser) took 144963.27 ms. Allocated memory was 159.4 MB in the beginning and 345.0 MB in the end (delta: 185.6 MB). Free memory was 140.0 MB in the beginning and 243.1 MB in the end (delta: -103.2 MB). Peak memory consumption was 81.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,532 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory was 131.3 MB in the beginning and 131.2 MB in the end (delta: 74.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:44:55,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 159.4 MB. Free memory was 139.8 MB in the beginning and 129.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.71 ms. Allocated memory is still 159.4 MB. Free memory was 129.4 MB in the beginning and 127.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,534 INFO L168 Benchmark]: Boogie Preprocessor took 45.29 ms. Allocated memory is still 159.4 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,534 INFO L168 Benchmark]: RCFGBuilder took 538.28 ms. Allocated memory is still 159.4 MB. Free memory was 126.5 MB in the beginning and 126.1 MB in the end (delta: 448.1 kB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,535 INFO L168 Benchmark]: TraceAbstraction took 144022.29 ms. Allocated memory was 159.4 MB in the beginning and 345.0 MB in the end (delta: 185.6 MB). Free memory was 125.8 MB in the beginning and 243.7 MB in the end (delta: -117.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:44:55,535 INFO L168 Benchmark]: Witness Printer took 4.18 ms. Allocated memory is still 345.0 MB. Free memory was 243.7 MB in the beginning and 243.1 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:44:55,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory was 131.3 MB in the beginning and 131.2 MB in the end (delta: 74.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 159.4 MB. Free memory was 139.8 MB in the beginning and 129.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 74.71 ms. Allocated memory is still 159.4 MB. Free memory was 129.4 MB in the beginning and 127.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.29 ms. Allocated memory is still 159.4 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 538.28 ms. Allocated memory is still 159.4 MB. Free memory was 126.5 MB in the beginning and 126.1 MB in the end (delta: 448.1 kB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 144022.29 ms. Allocated memory was 159.4 MB in the beginning and 345.0 MB in the end (delta: 185.6 MB). Free memory was 125.8 MB in the beginning and 243.7 MB in the end (delta: -117.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.18 ms. Allocated memory is still 345.0 MB. Free memory was 243.7 MB in the beginning and 243.1 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: 143.9s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 125.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 992 SDtfs, 4123 SDslu, 4170 SDs, 0 SdLazy, 5909 SolverSat, 710 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 74.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1074 GetRequests, 622 SyntacticMatches, 4 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 54.1s 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, 8.6s InterpolantComputationTime, 845 NumberOfCodeBlocks, 792 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 819 ConstructedInterpolants, 0 QuantifiedInterpolants, 337378 SizeOfPredicates, 320 NumberOfNonLiveVariables, 3338 ConjunctsInSsa, 824 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...