/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:36:05,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:36:05,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:36:05,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:36:05,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:36:05,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:36:05,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:36:05,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:36:05,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:36:05,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:36:05,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:36:05,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:36:05,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:36:05,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:36:05,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:36:05,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:36:05,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:36:05,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:36:05,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:36:05,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:36:05,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:36:05,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:36:05,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:36:05,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:36:05,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:36:05,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:36:05,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:36:05,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:36:05,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:36:05,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:36:05,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:36:05,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:36:05,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:36:05,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:36:05,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:36:05,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:36:05,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:36:05,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:36:05,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:36:05,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:36:05,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:36:05,921 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:36:05,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:36:05,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:36:05,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:36:05,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:36:05,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:36:05,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:36:05,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:36:05,923 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:36:05,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:36:05,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:36:05,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:36:05,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:36:05,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:36:05,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:36:05,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:36:05,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:36:05,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:36:05,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:36:05,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:36:05,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:36:05,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:36:06,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:36:06,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:36:06,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:36:06,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:36:06,346 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:36:06,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-01-06 17:36:06,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/213f76f6a/ce4380f679384cce9312de29b23e2b9f/FLAGafe905cce [2021-01-06 17:36:07,027 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:36:07,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-01-06 17:36:07,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/213f76f6a/ce4380f679384cce9312de29b23e2b9f/FLAGafe905cce [2021-01-06 17:36:07,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/213f76f6a/ce4380f679384cce9312de29b23e2b9f [2021-01-06 17:36:07,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:36:07,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:36:07,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:36:07,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:36:07,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:36:07,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ba6b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07, skipping insertion in model container [2021-01-06 17:36:07,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:36:07,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:36:07,616 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_valuebound100.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,] [2021-01-06 17:36:07,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:36:07,653 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:36:07,669 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_valuebound100.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,] [2021-01-06 17:36:07,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:36:07,699 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:36:07,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07 WrapperNode [2021-01-06 17:36:07,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:36:07,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:36:07,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:36:07,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:36:07,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:36:07,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:36:07,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:36:07,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:36:07,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... [2021-01-06 17:36:07,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:36:07,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:36:07,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:36:07,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:36:07,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:36:07,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:36:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:36:07,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:36:07,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:36:08,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:36:08,383 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-01-06 17:36:08,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:36:08 BoogieIcfgContainer [2021-01-06 17:36:08,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:36:08,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:36:08,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:36:08,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:36:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:36:07" (1/3) ... [2021-01-06 17:36:08,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e57b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:36:08, skipping insertion in model container [2021-01-06 17:36:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:36:07" (2/3) ... [2021-01-06 17:36:08,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e57b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:36:08, skipping insertion in model container [2021-01-06 17:36:08,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:36:08" (3/3) ... [2021-01-06 17:36:08,396 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2021-01-06 17:36:08,406 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:36:08,411 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 17:36:08,432 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 17:36:08,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:36:08,463 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:36:08,463 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:36:08,463 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:36:08,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:36:08,464 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:36:08,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:36:08,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:36:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2021-01-06 17:36:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:36:08,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:08,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:08,498 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]=== [2021-01-06 17:36:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2021-01-06 17:36:08,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:08,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771667758] [2021-01-06 17:36:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:08,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771667758] [2021-01-06 17:36:08,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:08,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:36:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78115866] [2021-01-06 17:36:08,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:36:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:08,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:36:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:36:08,806 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2021-01-06 17:36:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:08,849 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2021-01-06 17:36:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:36:08,851 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2021-01-06 17:36:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:08,865 INFO L225 Difference]: With dead ends: 79 [2021-01-06 17:36:08,865 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:36:08,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:36:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:36:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 17:36:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:36:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 17:36:08,926 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2021-01-06 17:36:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:08,927 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 17:36:08,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:36:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 17:36:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:36:08,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:08,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:08,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:36:08,930 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]=== [2021-01-06 17:36:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2021-01-06 17:36:08,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:08,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834845335] [2021-01-06 17:36:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:08,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:08,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559763570] [2021-01-06 17:36:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:36:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:09,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834845335] [2021-01-06 17:36:09,227 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:09,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559763570] [2021-01-06 17:36:09,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:09,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:36:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676208418] [2021-01-06 17:36:09,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:36:09,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:36:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:36:09,241 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2021-01-06 17:36:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:09,509 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-01-06 17:36:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:36:09,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:36:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:09,514 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:36:09,514 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:36:09,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:36:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:36:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-01-06 17:36:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:36:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 17:36:09,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2021-01-06 17:36:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:09,542 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 17:36:09,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:36:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 17:36:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:36:09,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:09,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:09,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:36:09,760 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]=== [2021-01-06 17:36:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2021-01-06 17:36:09,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:09,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885457228] [2021-01-06 17:36:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:09,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:09,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210925503] [2021-01-06 17:36:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:36:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885457228] [2021-01-06 17:36:10,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210925503] [2021-01-06 17:36:10,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:10,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-06 17:36:10,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936833776] [2021-01-06 17:36:10,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:36:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:36:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:36:10,300 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2021-01-06 17:36:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:10,843 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-01-06 17:36:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:36:10,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 17:36:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:10,845 INFO L225 Difference]: With dead ends: 60 [2021-01-06 17:36:10,845 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:36:10,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:36:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:36:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-01-06 17:36:10,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:36:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-01-06 17:36:10,855 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2021-01-06 17:36:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:10,856 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-01-06 17:36:10,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:36:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-01-06 17:36:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:36:10,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:10,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:11,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:11,073 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]=== [2021-01-06 17:36:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2021-01-06 17:36:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:11,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020395430] [2021-01-06 17:36:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:11,095 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:11,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029284601] [2021-01-06 17:36:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:36:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020395430] [2021-01-06 17:36:11,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029284601] [2021-01-06 17:36:11,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:11,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:36:11,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073495025] [2021-01-06 17:36:11,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:36:11,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:11,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:36:11,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:36:11,292 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2021-01-06 17:36:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:11,671 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-01-06 17:36:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:36:11,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-01-06 17:36:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:11,673 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:36:11,674 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:36:11,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:36:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:36:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-01-06 17:36:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:36:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-01-06 17:36:11,694 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-01-06 17:36:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:11,694 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-01-06 17:36:11,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:36:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-01-06 17:36:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:36:11,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:11,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:11,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:11,911 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]=== [2021-01-06 17:36:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2021-01-06 17:36:11,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:11,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409381351] [2021-01-06 17:36:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:11,932 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:11,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551716233] [2021-01-06 17:36:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:36:11,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409381351] [2021-01-06 17:36:12,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551716233] [2021-01-06 17:36:12,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:12,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:36:12,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049942263] [2021-01-06 17:36:12,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:36:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:36:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:36:12,078 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2021-01-06 17:36:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:12,259 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-01-06 17:36:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:36:12,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2021-01-06 17:36:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:12,261 INFO L225 Difference]: With dead ends: 140 [2021-01-06 17:36:12,261 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 17:36:12,262 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 [2021-01-06 17:36:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 17:36:12,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2021-01-06 17:36:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 17:36:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-01-06 17:36:12,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2021-01-06 17:36:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:12,276 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-01-06 17:36:12,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:36:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-01-06 17:36:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:36:12,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:12,277 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] [2021-01-06 17:36:12,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:12,492 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]=== [2021-01-06 17:36:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2021-01-06 17:36:12,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:12,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385084663] [2021-01-06 17:36:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:12,522 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:12,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765707845] [2021-01-06 17:36:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:36:12,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385084663] [2021-01-06 17:36:12,657 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765707845] [2021-01-06 17:36:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:12,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:36:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178020422] [2021-01-06 17:36:12,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:36:12,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:36:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:36:12,659 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2021-01-06 17:36:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:12,896 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-01-06 17:36:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:36:12,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 17:36:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:12,898 INFO L225 Difference]: With dead ends: 95 [2021-01-06 17:36:12,898 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 17:36:12,898 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 [2021-01-06 17:36:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 17:36:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-01-06 17:36:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 17:36:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-01-06 17:36:12,912 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2021-01-06 17:36:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:12,912 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-01-06 17:36:12,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:36:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-01-06 17:36:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:36:12,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:12,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:13,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:36:13,127 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]=== [2021-01-06 17:36:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2021-01-06 17:36:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:13,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526903167] [2021-01-06 17:36:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:13,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:13,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322327556] [2021-01-06 17:36:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:36:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526903167] [2021-01-06 17:36:13,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:13,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322327556] [2021-01-06 17:36:13,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:13,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:36:13,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555370023] [2021-01-06 17:36:13,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:36:13,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:36:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:36:13,400 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2021-01-06 17:36:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:13,630 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2021-01-06 17:36:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:36:13,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 17:36:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:13,632 INFO L225 Difference]: With dead ends: 135 [2021-01-06 17:36:13,632 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 17:36:13,633 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 [2021-01-06 17:36:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 17:36:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2021-01-06 17:36:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 17:36:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2021-01-06 17:36:13,652 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 22 [2021-01-06 17:36:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:13,653 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2021-01-06 17:36:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:36:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2021-01-06 17:36:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:36:13,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:13,654 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] [2021-01-06 17:36:13,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:13,868 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]=== [2021-01-06 17:36:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2021-01-06 17:36:13,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:13,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393058667] [2021-01-06 17:36:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:13,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:13,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730169732] [2021-01-06 17:36:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:13,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:36:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393058667] [2021-01-06 17:36:14,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730169732] [2021-01-06 17:36:14,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:36:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383333999] [2021-01-06 17:36:14,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:36:14,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:36:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:36:14,021 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 5 states. [2021-01-06 17:36:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:14,175 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2021-01-06 17:36:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:36:14,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 17:36:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:14,179 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:36:14,179 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 17:36:14,180 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 [2021-01-06 17:36:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 17:36:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-01-06 17:36:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 17:36:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2021-01-06 17:36:14,208 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 23 [2021-01-06 17:36:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:14,208 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2021-01-06 17:36:14,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:36:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2021-01-06 17:36:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:36:14,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:14,210 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] [2021-01-06 17:36:14,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:14,425 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]=== [2021-01-06 17:36:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2021-01-06 17:36:14,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:14,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425553399] [2021-01-06 17:36:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:14,442 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:14,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634210008] [2021-01-06 17:36:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:36:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:14,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425553399] [2021-01-06 17:36:14,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:14,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634210008] [2021-01-06 17:36:14,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:14,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:36:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061472808] [2021-01-06 17:36:14,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:36:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:36:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:36:14,669 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand 8 states. [2021-01-06 17:36:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:14,954 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2021-01-06 17:36:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:36:14,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-01-06 17:36:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:14,956 INFO L225 Difference]: With dead ends: 179 [2021-01-06 17:36:14,956 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:36:14,957 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 [2021-01-06 17:36:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:36:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2021-01-06 17:36:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 17:36:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2021-01-06 17:36:14,996 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 24 [2021-01-06 17:36:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:14,997 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2021-01-06 17:36:14,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:36:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2021-01-06 17:36:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:36:14,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:14,998 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] [2021-01-06 17:36:15,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:36:15,212 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]=== [2021-01-06 17:36:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash 151041369, now seen corresponding path program 1 times [2021-01-06 17:36:15,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:15,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855024783] [2021-01-06 17:36:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:15,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:15,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609510553] [2021-01-06 17:36:15,228 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 [2021-01-06 17:36:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:36:15,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855024783] [2021-01-06 17:36:15,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609510553] [2021-01-06 17:36:15,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:15,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:36:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622520958] [2021-01-06 17:36:15,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:36:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:36:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:36:15,434 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 11 states. [2021-01-06 17:36:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:15,834 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2021-01-06 17:36:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:36:15,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2021-01-06 17:36:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:15,836 INFO L225 Difference]: With dead ends: 277 [2021-01-06 17:36:15,837 INFO L226 Difference]: Without dead ends: 275 [2021-01-06 17:36:15,837 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 [2021-01-06 17:36:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-01-06 17:36:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 198. [2021-01-06 17:36:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 17:36:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2021-01-06 17:36:15,862 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 26 [2021-01-06 17:36:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:15,862 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2021-01-06 17:36:15,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:36:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2021-01-06 17:36:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:36:15,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:15,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:36:16,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:16,078 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]=== [2021-01-06 17:36:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash -74821968, now seen corresponding path program 2 times [2021-01-06 17:36:16,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380620166] [2021-01-06 17:36:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:16,093 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:16,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132818600] [2021-01-06 17:36:16,093 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 [2021-01-06 17:36:16,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:36:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:36:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:16,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380620166] [2021-01-06 17:36:16,224 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:16,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132818600] [2021-01-06 17:36:16,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:16,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:36:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399133339] [2021-01-06 17:36:16,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:36:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:36:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:36:16,226 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 5 states. [2021-01-06 17:36:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:16,341 INFO L93 Difference]: Finished difference Result 291 states and 355 transitions. [2021-01-06 17:36:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:36:16,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 17:36:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:16,344 INFO L225 Difference]: With dead ends: 291 [2021-01-06 17:36:16,344 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 17:36:16,345 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 [2021-01-06 17:36:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 17:36:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2021-01-06 17:36:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 17:36:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-01-06 17:36:16,367 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 27 [2021-01-06 17:36:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:16,368 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-01-06 17:36:16,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:36:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-01-06 17:36:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:36:16,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:16,369 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] [2021-01-06 17:36:16,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:16,583 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]=== [2021-01-06 17:36:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2021-01-06 17:36:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:16,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986897634] [2021-01-06 17:36:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:16,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:16,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933433228] [2021-01-06 17:36:16,608 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 [2021-01-06 17:36:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 17:36:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:17,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986897634] [2021-01-06 17:36:17,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:17,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933433228] [2021-01-06 17:36:17,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:17,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:36:17,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891645830] [2021-01-06 17:36:17,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:36:17,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:17,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:36:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:36:17,083 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 13 states. [2021-01-06 17:36:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:17,880 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2021-01-06 17:36:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:36:17,881 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2021-01-06 17:36:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:17,882 INFO L225 Difference]: With dead ends: 282 [2021-01-06 17:36:17,882 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 17:36:17,883 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 [2021-01-06 17:36:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 17:36:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2021-01-06 17:36:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 17:36:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2021-01-06 17:36:17,906 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 32 [2021-01-06 17:36:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:17,906 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2021-01-06 17:36:17,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:36:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2021-01-06 17:36:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:36:17,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:17,907 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] [2021-01-06 17:36:18,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:36:18,121 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]=== [2021-01-06 17:36:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2021-01-06 17:36:18,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:18,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333135805] [2021-01-06 17:36:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:18,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:18,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477922379] [2021-01-06 17:36:18,134 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 [2021-01-06 17:36:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:36:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:18,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333135805] [2021-01-06 17:36:18,318 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:18,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477922379] [2021-01-06 17:36:18,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:18,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:36:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925757242] [2021-01-06 17:36:18,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:36:18,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:36:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:36:18,320 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 9 states. [2021-01-06 17:36:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:18,763 INFO L93 Difference]: Finished difference Result 211 states and 244 transitions. [2021-01-06 17:36:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:36:18,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2021-01-06 17:36:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:18,765 INFO L225 Difference]: With dead ends: 211 [2021-01-06 17:36:18,766 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 17:36:18,766 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 [2021-01-06 17:36:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 17:36:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2021-01-06 17:36:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 17:36:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-01-06 17:36:18,794 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 32 [2021-01-06 17:36:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:18,795 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-01-06 17:36:18,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:36:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-01-06 17:36:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:36:18,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:18,796 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] [2021-01-06 17:36:19,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:36:19,011 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]=== [2021-01-06 17:36:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -315127458, now seen corresponding path program 2 times [2021-01-06 17:36:19,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:19,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822832735] [2021-01-06 17:36:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:19,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:19,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664747054] [2021-01-06 17:36:19,039 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 [2021-01-06 17:36:19,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:36:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:36:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:19,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822832735] [2021-01-06 17:36:19,196 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:19,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664747054] [2021-01-06 17:36:19,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:19,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:36:19,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254683562] [2021-01-06 17:36:19,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:36:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:36:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:36:19,198 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand 8 states. [2021-01-06 17:36:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:19,599 INFO L93 Difference]: Finished difference Result 402 states and 471 transitions. [2021-01-06 17:36:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:36:19,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-01-06 17:36:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:19,602 INFO L225 Difference]: With dead ends: 402 [2021-01-06 17:36:19,602 INFO L226 Difference]: Without dead ends: 398 [2021-01-06 17:36:19,603 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 [2021-01-06 17:36:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-01-06 17:36:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 221. [2021-01-06 17:36:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-01-06 17:36:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2021-01-06 17:36:19,637 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 37 [2021-01-06 17:36:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:19,637 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2021-01-06 17:36:19,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:36:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2021-01-06 17:36:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:36:19,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:19,638 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] [2021-01-06 17:36:19,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:36:19,852 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]=== [2021-01-06 17:36:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash -188960243, now seen corresponding path program 1 times [2021-01-06 17:36:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:19,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74789417] [2021-01-06 17:36:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:19,872 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991284609] [2021-01-06 17:36:19,878 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 [2021-01-06 17:36:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:36:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:20,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74789417] [2021-01-06 17:36:20,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991284609] [2021-01-06 17:36:20,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:20,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:36:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499593617] [2021-01-06 17:36:20,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:36:20,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:36:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:36:20,112 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 12 states. [2021-01-06 17:36:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:20,792 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2021-01-06 17:36:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:36:20,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2021-01-06 17:36:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:20,795 INFO L225 Difference]: With dead ends: 363 [2021-01-06 17:36:20,795 INFO L226 Difference]: Without dead ends: 361 [2021-01-06 17:36:20,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:36:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-01-06 17:36:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 261. [2021-01-06 17:36:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-01-06 17:36:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2021-01-06 17:36:20,831 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 37 [2021-01-06 17:36:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:20,832 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2021-01-06 17:36:20,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:36:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2021-01-06 17:36:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:36:20,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:20,833 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] [2021-01-06 17:36:21,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:21,043 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]=== [2021-01-06 17:36:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2021-01-06 17:36:21,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:21,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648780870] [2021-01-06 17:36:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:21,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:21,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871520474] [2021-01-06 17:36:21,058 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 [2021-01-06 17:36:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:21,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:36:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:36:21,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648780870] [2021-01-06 17:36:21,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:21,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871520474] [2021-01-06 17:36:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:36:21,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188089674] [2021-01-06 17:36:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:36:21,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:21,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:36:21,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:36:21,169 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand 5 states. [2021-01-06 17:36:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:21,256 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2021-01-06 17:36:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:36:21,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-01-06 17:36:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:21,259 INFO L225 Difference]: With dead ends: 454 [2021-01-06 17:36:21,259 INFO L226 Difference]: Without dead ends: 287 [2021-01-06 17:36:21,260 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 [2021-01-06 17:36:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-01-06 17:36:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2021-01-06 17:36:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-01-06 17:36:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 312 transitions. [2021-01-06 17:36:21,295 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 312 transitions. Word has length 38 [2021-01-06 17:36:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:21,296 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 312 transitions. [2021-01-06 17:36:21,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:36:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 312 transitions. [2021-01-06 17:36:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:36:21,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:21,297 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] [2021-01-06 17:36:21,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:36:21,513 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]=== [2021-01-06 17:36:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2021-01-06 17:36:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:21,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474045117] [2021-01-06 17:36:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:21,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:21,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446646562] [2021-01-06 17:36:21,525 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 [2021-01-06 17:36:21,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 17:36:21,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:36:21,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:36:21,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474045117] [2021-01-06 17:36:21,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:21,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446646562] [2021-01-06 17:36:21,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:36:21,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:36:21,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986559824] [2021-01-06 17:36:21,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:36:21,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:21,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:36:21,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:36:21,634 INFO L87 Difference]: Start difference. First operand 261 states and 312 transitions. Second operand 5 states. [2021-01-06 17:36:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:21,784 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2021-01-06 17:36:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:36:21,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2021-01-06 17:36:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:21,787 INFO L225 Difference]: With dead ends: 301 [2021-01-06 17:36:21,787 INFO L226 Difference]: Without dead ends: 299 [2021-01-06 17:36:21,787 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 [2021-01-06 17:36:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-01-06 17:36:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2021-01-06 17:36:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2021-01-06 17:36:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 345 transitions. [2021-01-06 17:36:21,828 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 345 transitions. Word has length 38 [2021-01-06 17:36:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:21,828 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 345 transitions. [2021-01-06 17:36:21,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:36:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 345 transitions. [2021-01-06 17:36:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:36:21,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:21,829 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] [2021-01-06 17:36:22,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:36:22,044 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]=== [2021-01-06 17:36:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2091903451, now seen corresponding path program 1 times [2021-01-06 17:36:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:22,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527296008] [2021-01-06 17:36:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:22,056 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:22,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401707200] [2021-01-06 17:36:22,057 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 [2021-01-06 17:36:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:36:22,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:22,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527296008] [2021-01-06 17:36:22,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:22,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401707200] [2021-01-06 17:36:22,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:22,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:36:22,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531310872] [2021-01-06 17:36:22,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:36:22,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:22,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:36:22,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:36:22,519 INFO L87 Difference]: Start difference. First operand 288 states and 345 transitions. Second operand 15 states. [2021-01-06 17:36:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:25,108 INFO L93 Difference]: Finished difference Result 450 states and 519 transitions. [2021-01-06 17:36:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:36:25,109 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2021-01-06 17:36:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:25,111 INFO L225 Difference]: With dead ends: 450 [2021-01-06 17:36:25,111 INFO L226 Difference]: Without dead ends: 448 [2021-01-06 17:36:25,113 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 [2021-01-06 17:36:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-01-06 17:36:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 382. [2021-01-06 17:36:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-01-06 17:36:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 470 transitions. [2021-01-06 17:36:25,175 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 470 transitions. Word has length 39 [2021-01-06 17:36:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:25,176 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 470 transitions. [2021-01-06 17:36:25,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:36:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 470 transitions. [2021-01-06 17:36:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:36:25,176 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:25,177 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] [2021-01-06 17:36:25,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:36:25,392 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]=== [2021-01-06 17:36:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2021-01-06 17:36:25,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:25,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663617461] [2021-01-06 17:36:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:25,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:25,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349002665] [2021-01-06 17:36:25,404 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 [2021-01-06 17:36:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 17:36:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:26,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663617461] [2021-01-06 17:36:26,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349002665] [2021-01-06 17:36:26,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:26,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 17:36:26,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503441778] [2021-01-06 17:36:26,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:36:26,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:36:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:36:26,246 INFO L87 Difference]: Start difference. First operand 382 states and 470 transitions. Second operand 18 states. [2021-01-06 17:36:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:27,733 INFO L93 Difference]: Finished difference Result 461 states and 553 transitions. [2021-01-06 17:36:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:36:27,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2021-01-06 17:36:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:27,736 INFO L225 Difference]: With dead ends: 461 [2021-01-06 17:36:27,736 INFO L226 Difference]: Without dead ends: 459 [2021-01-06 17:36:27,737 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 [2021-01-06 17:36:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-01-06 17:36:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 429. [2021-01-06 17:36:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2021-01-06 17:36:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 526 transitions. [2021-01-06 17:36:27,810 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 526 transitions. Word has length 41 [2021-01-06 17:36:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:27,810 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 526 transitions. [2021-01-06 17:36:27,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:36:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 526 transitions. [2021-01-06 17:36:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:36:27,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:27,811 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] [2021-01-06 17:36:28,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:28,026 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]=== [2021-01-06 17:36:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1404711062, now seen corresponding path program 1 times [2021-01-06 17:36:28,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:28,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114631640] [2021-01-06 17:36:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:28,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:28,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597542039] [2021-01-06 17:36:28,047 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 [2021-01-06 17:36:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:28,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 17:36:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:29,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114631640] [2021-01-06 17:36:29,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:29,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597542039] [2021-01-06 17:36:29,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:29,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 17:36:29,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563294528] [2021-01-06 17:36:29,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:36:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:29,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:36:29,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:36:29,016 INFO L87 Difference]: Start difference. First operand 429 states and 526 transitions. Second operand 19 states. [2021-01-06 17:36:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:30,414 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2021-01-06 17:36:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:36:30,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2021-01-06 17:36:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:30,418 INFO L225 Difference]: With dead ends: 535 [2021-01-06 17:36:30,418 INFO L226 Difference]: Without dead ends: 527 [2021-01-06 17:36:30,419 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 [2021-01-06 17:36:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-01-06 17:36:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 450. [2021-01-06 17:36:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2021-01-06 17:36:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 550 transitions. [2021-01-06 17:36:30,488 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 550 transitions. Word has length 41 [2021-01-06 17:36:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:30,488 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 550 transitions. [2021-01-06 17:36:30,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:36:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 550 transitions. [2021-01-06 17:36:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:36:30,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:30,489 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] [2021-01-06 17:36:30,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:30,703 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]=== [2021-01-06 17:36:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1278543847, now seen corresponding path program 2 times [2021-01-06 17:36:30,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:30,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190573352] [2021-01-06 17:36:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:30,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:30,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781649001] [2021-01-06 17:36:30,715 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 [2021-01-06 17:36:30,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:36:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:36:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190573352] [2021-01-06 17:36:30,948 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781649001] [2021-01-06 17:36:30,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:30,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:36:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173757475] [2021-01-06 17:36:30,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:36:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:36:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:36:30,950 INFO L87 Difference]: Start difference. First operand 450 states and 550 transitions. Second operand 11 states. [2021-01-06 17:36:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:31,741 INFO L93 Difference]: Finished difference Result 501 states and 605 transitions. [2021-01-06 17:36:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:36:31,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2021-01-06 17:36:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:31,744 INFO L225 Difference]: With dead ends: 501 [2021-01-06 17:36:31,744 INFO L226 Difference]: Without dead ends: 499 [2021-01-06 17:36:31,745 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 [2021-01-06 17:36:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-01-06 17:36:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 468. [2021-01-06 17:36:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2021-01-06 17:36:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 571 transitions. [2021-01-06 17:36:31,832 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 571 transitions. Word has length 41 [2021-01-06 17:36:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:31,832 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 571 transitions. [2021-01-06 17:36:31,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:36:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 571 transitions. [2021-01-06 17:36:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:36:31,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:31,833 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] [2021-01-06 17:36:32,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:36:32,049 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]=== [2021-01-06 17:36:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 2 times [2021-01-06 17:36:32,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:32,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240741395] [2021-01-06 17:36:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:32,062 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:32,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691768978] [2021-01-06 17:36:32,062 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 [2021-01-06 17:36:32,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:36:32,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:32,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 17:36:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240741395] [2021-01-06 17:36:32,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691768978] [2021-01-06 17:36:32,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:32,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 17:36:32,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534593660] [2021-01-06 17:36:32,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:36:32,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:32,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:36:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:36:32,825 INFO L87 Difference]: Start difference. First operand 468 states and 571 transitions. Second operand 17 states. [2021-01-06 17:36:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:34,387 INFO L93 Difference]: Finished difference Result 604 states and 722 transitions. [2021-01-06 17:36:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:36:34,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2021-01-06 17:36:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:34,392 INFO L225 Difference]: With dead ends: 604 [2021-01-06 17:36:34,392 INFO L226 Difference]: Without dead ends: 594 [2021-01-06 17:36:34,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:36:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-01-06 17:36:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 489. [2021-01-06 17:36:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2021-01-06 17:36:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 595 transitions. [2021-01-06 17:36:34,486 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 595 transitions. Word has length 46 [2021-01-06 17:36:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:34,487 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 595 transitions. [2021-01-06 17:36:34,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:36:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 595 transitions. [2021-01-06 17:36:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:36:34,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:34,488 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] [2021-01-06 17:36:34,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:36:34,702 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]=== [2021-01-06 17:36:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2102920060, now seen corresponding path program 2 times [2021-01-06 17:36:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:34,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825741719] [2021-01-06 17:36:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:34,716 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941082752] [2021-01-06 17:36:34,716 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 [2021-01-06 17:36:34,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:36:34,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:36:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:35,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825741719] [2021-01-06 17:36:35,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:35,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941082752] [2021-01-06 17:36:35,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:35,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 17:36:35,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030398242] [2021-01-06 17:36:35,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:36:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:36:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:36:35,251 INFO L87 Difference]: Start difference. First operand 489 states and 595 transitions. Second operand 17 states. [2021-01-06 17:36:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:42,513 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2021-01-06 17:36:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:36:42,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2021-01-06 17:36:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:42,518 INFO L225 Difference]: With dead ends: 633 [2021-01-06 17:36:42,518 INFO L226 Difference]: Without dead ends: 629 [2021-01-06 17:36:42,519 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 [2021-01-06 17:36:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-01-06 17:36:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 507. [2021-01-06 17:36:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2021-01-06 17:36:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 615 transitions. [2021-01-06 17:36:42,622 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 615 transitions. Word has length 46 [2021-01-06 17:36:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:42,622 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 615 transitions. [2021-01-06 17:36:42,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:36:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 615 transitions. [2021-01-06 17:36:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:36:42,623 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:42,623 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] [2021-01-06 17:36:42,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:42,837 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]=== [2021-01-06 17:36:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1437779966, now seen corresponding path program 1 times [2021-01-06 17:36:42,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:42,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311169313] [2021-01-06 17:36:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:42,851 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:42,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723324716] [2021-01-06 17:36:42,852 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 [2021-01-06 17:36:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:36:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:36:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:36:43,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311169313] [2021-01-06 17:36:43,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:43,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723324716] [2021-01-06 17:36:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:36:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329991904] [2021-01-06 17:36:43,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:36:43,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:36:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:36:43,146 INFO L87 Difference]: Start difference. First operand 507 states and 615 transitions. Second operand 13 states. [2021-01-06 17:36:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:44,235 INFO L93 Difference]: Finished difference Result 723 states and 875 transitions. [2021-01-06 17:36:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:36:44,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2021-01-06 17:36:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:44,239 INFO L225 Difference]: With dead ends: 723 [2021-01-06 17:36:44,240 INFO L226 Difference]: Without dead ends: 721 [2021-01-06 17:36:44,241 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 [2021-01-06 17:36:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-01-06 17:36:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 603. [2021-01-06 17:36:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2021-01-06 17:36:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 729 transitions. [2021-01-06 17:36:44,356 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 729 transitions. Word has length 49 [2021-01-06 17:36:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:44,356 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 729 transitions. [2021-01-06 17:36:44,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:36:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 729 transitions. [2021-01-06 17:36:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:36:44,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:44,358 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] [2021-01-06 17:36:44,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:36:44,572 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]=== [2021-01-06 17:36:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1323606593, now seen corresponding path program 3 times [2021-01-06 17:36:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:44,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121566270] [2021-01-06 17:36:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:44,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328431496] [2021-01-06 17:36:44,591 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 [2021-01-06 17:36:44,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:36:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 17:36:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 17:36:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121566270] [2021-01-06 17:36:45,047 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:45,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328431496] [2021-01-06 17:36:45,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:45,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:36:45,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733808843] [2021-01-06 17:36:45,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:36:45,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:36:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:36:45,049 INFO L87 Difference]: Start difference. First operand 603 states and 729 transitions. Second operand 12 states. [2021-01-06 17:36:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:36:49,966 INFO L93 Difference]: Finished difference Result 752 states and 897 transitions. [2021-01-06 17:36:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:36:49,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2021-01-06 17:36:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:36:49,971 INFO L225 Difference]: With dead ends: 752 [2021-01-06 17:36:49,972 INFO L226 Difference]: Without dead ends: 744 [2021-01-06 17:36:49,973 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 [2021-01-06 17:36:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-01-06 17:36:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 620. [2021-01-06 17:36:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2021-01-06 17:36:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 748 transitions. [2021-01-06 17:36:50,106 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 748 transitions. Word has length 50 [2021-01-06 17:36:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:36:50,107 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 748 transitions. [2021-01-06 17:36:50,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:36:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 748 transitions. [2021-01-06 17:36:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:36:50,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:36:50,108 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] [2021-01-06 17:36:50,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:36:50,324 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]=== [2021-01-06 17:36:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:36:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1449773808, now seen corresponding path program 3 times [2021-01-06 17:36:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:36:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740606267] [2021-01-06 17:36:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:36:50,334 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:36:50,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474837954] [2021-01-06 17:36:50,334 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 [2021-01-06 17:36:50,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:36:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:36:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:36:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:36:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:36:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740606267] [2021-01-06 17:36:52,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:36:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474837954] [2021-01-06 17:36:52,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:36:52,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:36:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147039678] [2021-01-06 17:36:52,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:36:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:36:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:36:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2021-01-06 17:36:52,741 INFO L87 Difference]: Start difference. First operand 620 states and 748 transitions. Second operand 8 states. [2021-01-06 17:38:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:38:33,309 INFO L93 Difference]: Finished difference Result 630 states and 753 transitions. [2021-01-06 17:38:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:38:33,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2021-01-06 17:38:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:38:33,314 INFO L225 Difference]: With dead ends: 630 [2021-01-06 17:38:33,315 INFO L226 Difference]: Without dead ends: 628 [2021-01-06 17:38:33,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=73, Invalid=179, Unknown=20, NotChecked=0, Total=272 [2021-01-06 17:38:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-01-06 17:38:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 443. [2021-01-06 17:38:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2021-01-06 17:38:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 529 transitions. [2021-01-06 17:38:33,426 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 529 transitions. Word has length 50 [2021-01-06 17:38:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:38:33,426 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 529 transitions. [2021-01-06 17:38:33,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:38:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 529 transitions. [2021-01-06 17:38:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:38:33,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:38:33,427 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] [2021-01-06 17:38:33,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:38:33,642 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]=== [2021-01-06 17:38:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:38:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 272025232, now seen corresponding path program 2 times [2021-01-06 17:38:33,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:38:33,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901925315] [2021-01-06 17:38:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:38:33,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:38:33,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161743442] [2021-01-06 17:38:33,656 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 [2021-01-06 17:38:33,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:38:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:38:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:38:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:38:34,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901925315] [2021-01-06 17:38:34,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:38:34,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161743442] [2021-01-06 17:38:34,380 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:38:34,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:38:34,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:38:34,380 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:38:34,380 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:38:34,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:38:34,634 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:38:34,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:38:34 BoogieIcfgContainer [2021-01-06 17:38:34,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:38:34,635 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:38:34,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:38:34,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:38:34,636 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:36:08" (3/4) ... [2021-01-06 17:38:34,640 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:38:34,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:38:34,643 INFO L168 Benchmark]: Toolchain (without parser) took 147238.03 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 138.8 MB in the beginning and 204.2 MB in the end (delta: -65.4 MB). Peak memory consumption was 114.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,643 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 163.6 MB. Free memory is still 136.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:38:34,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.11 ms. Allocated memory is still 163.6 MB. Free memory was 138.7 MB in the beginning and 128.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.63 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 126.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,645 INFO L168 Benchmark]: Boogie Preprocessor took 31.24 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 125.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,645 INFO L168 Benchmark]: RCFGBuilder took 602.89 ms. Allocated memory is still 163.6 MB. Free memory was 125.3 MB in the beginning and 140.6 MB in the end (delta: -15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,646 INFO L168 Benchmark]: TraceAbstraction took 146247.82 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 140.1 MB in the beginning and 204.7 MB in the end (delta: -64.6 MB). Peak memory consumption was 115.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:34,646 INFO L168 Benchmark]: Witness Printer took 5.17 ms. Allocated memory is still 342.9 MB. Free memory is still 204.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:38:34,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 163.6 MB. Free memory is still 136.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.11 ms. Allocated memory is still 163.6 MB. Free memory was 138.7 MB in the beginning and 128.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.63 ms. Allocated memory is still 163.6 MB. Free memory was 128.3 MB in the beginning and 126.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.24 ms. Allocated memory is still 163.6 MB. Free memory was 126.5 MB in the beginning and 125.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 602.89 ms. Allocated memory is still 163.6 MB. Free memory was 125.3 MB in the beginning and 140.6 MB in the end (delta: -15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 146247.82 ms. Allocated memory was 163.6 MB in the beginning and 342.9 MB in the end (delta: 179.3 MB). Free memory was 140.1 MB in the beginning and 204.7 MB in the end (delta: -64.6 MB). Peak memory consumption was 115.7 MB. Max. memory is 8.0 GB. * Witness Printer took 5.17 ms. Allocated memory is still 342.9 MB. Free memory is still 204.2 MB. 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: 146.1s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 127.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 992 SDtfs, 4123 SDslu, 4169 SDs, 0 SdLazy, 5909 SolverSat, 710 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 75.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1074 GetRequests, 622 SyntacticMatches, 4 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 54.2s 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, 8.7s 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...