/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:33:29,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:33:29,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:33:30,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:33:30,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:33:30,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:33:30,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:33:30,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:33:30,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:33:30,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:33:30,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:33:30,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:33:30,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:33:30,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:33:30,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:33:30,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:33:30,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:33:30,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:33:30,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:33:30,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:33:30,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:33:30,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:33:30,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:33:30,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:33:30,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:33:30,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:33:30,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:33:30,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:33:30,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:33:30,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:33:30,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:33:30,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:33:30,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:33:30,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:33:30,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:33:30,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:33:30,076 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 17:33:30,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:33:30,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:33:30,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:33:30,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:33:30,107 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:33:30,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:33:30,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:33:30,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:33:30,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:33:30,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:33:30,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:33:30,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:33:30,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:33:30,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:33:30,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:33:30,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:33:30,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:33:30,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:33:30,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:33:30,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:33:30,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:33:30,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:33:30,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:33:30,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:33:30,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:33:30,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:33:30,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:33:30,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:33:30,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:33:30,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:33:30,517 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:33:30,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-01-06 17:33:30,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82902c835/1caa53cac1b84b98bbb19cdf5d426fe9/FLAG2b0a5ef10 [2021-01-06 17:33:31,295 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:33:31,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-01-06 17:33:31,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82902c835/1caa53cac1b84b98bbb19cdf5d426fe9/FLAG2b0a5ef10 [2021-01-06 17:33:31,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82902c835/1caa53cac1b84b98bbb19cdf5d426fe9 [2021-01-06 17:33:31,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:33:31,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:33:31,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:31,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:33:31,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:33:31,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:31,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449ae3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31, skipping insertion in model container [2021-01-06 17:33:31,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:31,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:33:31,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:33:31,877 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_unwindbound5.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 17:33:31,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:31,915 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:33:31,931 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_unwindbound5.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 17:33:31,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:31,962 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:33:31,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31 WrapperNode [2021-01-06 17:33:31,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:31,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:31,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:33:31,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:33:31,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:31,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:32,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:33:32,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:33:32,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:33:32,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (1/1) ... [2021-01-06 17:33:32,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:33:32,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:33:32,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:33:32,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:33:32,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (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 17:33:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:33:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:33:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:33:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:33:32,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:33:32,678 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-01-06 17:33:32,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:32 BoogieIcfgContainer [2021-01-06 17:33:32,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:33:32,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:33:32,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:33:32,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:33:32,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:33:31" (1/3) ... [2021-01-06 17:33:32,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209295b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:32, skipping insertion in model container [2021-01-06 17:33:32,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:31" (2/3) ... [2021-01-06 17:33:32,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209295b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:32, skipping insertion in model container [2021-01-06 17:33:32,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:32" (3/3) ... [2021-01-06 17:33:32,689 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2021-01-06 17:33:32,695 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:33:32,701 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 17:33:32,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 17:33:32,751 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:33:32,751 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:33:32,751 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:33:32,751 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:33:32,751 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:33:32,752 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:33:32,752 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:33:32,752 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:33:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-01-06 17:33:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:33:32,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:32,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:32,777 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 17:33:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-01-06 17:33:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:32,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876080617] [2021-01-06 17:33:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:32,969 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 17:33:32,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876080617] [2021-01-06 17:33:32,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:32,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:33:32,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42169039] [2021-01-06 17:33:32,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:33:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:33:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:33:33,005 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2021-01-06 17:33:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:33,029 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-01-06 17:33:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:33:33,031 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 17:33:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:33,041 INFO L225 Difference]: With dead ends: 77 [2021-01-06 17:33:33,041 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:33:33,045 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 17:33:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:33:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:33:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:33:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 17:33:33,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-01-06 17:33:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:33,086 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 17:33:33,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:33:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 17:33:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:33:33,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:33,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:33,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:33:33,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-01-06 17:33:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:33,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144370596] [2021-01-06 17:33:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:33,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19907191] [2021-01-06 17:33:33,114 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 17:33:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:33:33,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:33,315 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 17:33:33,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144370596] [2021-01-06 17:33:33,316 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:33,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19907191] [2021-01-06 17:33:33,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:33,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:33:33,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064680403] [2021-01-06 17:33:33,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:33:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:33:33,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:33:33,321 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2021-01-06 17:33:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:33,350 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:33:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:33:33,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:33:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:33,353 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:33:33,353 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:33:33,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:33:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:33:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:33:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:33:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 17:33:33,361 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-01-06 17:33:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:33,361 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 17:33:33,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:33:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 17:33:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:33:33,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:33,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:33,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:33:33,577 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 17:33:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-01-06 17:33:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:33,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991392491] [2021-01-06 17:33:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:33,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:33,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575390025] [2021-01-06 17:33:33,600 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 17:33:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:33,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:33,756 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 17:33:33,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991392491] [2021-01-06 17:33:33,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:33,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575390025] [2021-01-06 17:33:33,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:33,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:33,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747662725] [2021-01-06 17:33:33,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:33,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:33,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:33,760 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2021-01-06 17:33:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:33,915 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-01-06 17:33:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:33,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:33:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:33,918 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:33:33,918 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:33:33,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 17:33:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:33:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-01-06 17:33:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:33:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-01-06 17:33:33,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-01-06 17:33:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:33,927 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-01-06 17:33:33,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-01-06 17:33:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:33:33,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:33,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:34,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:34,134 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 17:33:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-01-06 17:33:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:34,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003845744] [2021-01-06 17:33:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:34,164 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:34,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197729056] [2021-01-06 17:33:34,165 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 17:33:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:34,596 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 17:33:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003845744] [2021-01-06 17:33:34,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197729056] [2021-01-06 17:33:34,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:34,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:34,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522813888] [2021-01-06 17:33:34,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:34,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:34,603 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2021-01-06 17:33:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:35,000 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 17:33:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:35,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 17:33:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:35,002 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:33:35,002 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:33:35,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:33:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-01-06 17:33:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:33:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-01-06 17:33:35,013 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-01-06 17:33:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:35,013 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-01-06 17:33:35,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-01-06 17:33:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:33:35,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:35,014 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:35,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:35,228 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 17:33:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-01-06 17:33:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:35,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781826164] [2021-01-06 17:33:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:35,247 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:35,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365851319] [2021-01-06 17:33:35,248 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 17:33:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781826164] [2021-01-06 17:33:35,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:35,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365851319] [2021-01-06 17:33:35,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:35,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:33:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842090326] [2021-01-06 17:33:35,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:35,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:35,409 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2021-01-06 17:33:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:35,450 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-01-06 17:33:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:35,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 17:33:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:35,453 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:33:35,454 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:33:35,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:33:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 17:33:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 17:33:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-01-06 17:33:35,465 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-01-06 17:33:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:35,465 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-01-06 17:33:35,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-01-06 17:33:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:35,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:35,466 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:35,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:35,681 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 17:33:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-01-06 17:33:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:35,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53617586] [2021-01-06 17:33:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:35,704 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:35,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558201815] [2021-01-06 17:33:35,705 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 17:33:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:35,880 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 17:33:35,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53617586] [2021-01-06 17:33:35,881 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:35,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558201815] [2021-01-06 17:33:35,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:35,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:33:35,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967715046] [2021-01-06 17:33:35,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:35,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:35,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:35,884 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2021-01-06 17:33:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:35,948 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-01-06 17:33:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:33:35,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-01-06 17:33:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:35,951 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:33:35,951 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:33:35,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:33:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 17:33:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:33:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-01-06 17:33:35,982 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-01-06 17:33:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:35,982 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-01-06 17:33:35,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-01-06 17:33:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:35,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:35,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:36,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:33:36,199 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 17:33:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-01-06 17:33:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:36,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626237291] [2021-01-06 17:33:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:36,218 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:36,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119542879] [2021-01-06 17:33:36,218 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 17:33:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:36,483 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 17:33:36,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626237291] [2021-01-06 17:33:36,484 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:36,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119542879] [2021-01-06 17:33:36,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:36,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:36,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091065506] [2021-01-06 17:33:36,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:36,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:36,486 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 8 states. [2021-01-06 17:33:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:36,841 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:33:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:36,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 17:33:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:36,849 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:33:36,849 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:33:36,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 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 17:33:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:33:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-01-06 17:33:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:33:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-01-06 17:33:36,869 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-01-06 17:33:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:36,871 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-01-06 17:33:36,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-01-06 17:33:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:33:36,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:36,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:37,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:37,074 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 17:33:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-01-06 17:33:37,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:37,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335404634] [2021-01-06 17:33:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:37,099 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:37,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307361277] [2021-01-06 17:33:37,101 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 17:33:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:33:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335404634] [2021-01-06 17:33:37,271 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307361277] [2021-01-06 17:33:37,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:37,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:37,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163462204] [2021-01-06 17:33:37,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:37,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:37,273 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2021-01-06 17:33:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:37,619 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-01-06 17:33:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:33:37,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 17:33:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:37,621 INFO L225 Difference]: With dead ends: 191 [2021-01-06 17:33:37,621 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 17:33:37,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:33:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 17:33:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-01-06 17:33:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 17:33:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-01-06 17:33:37,634 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-01-06 17:33:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-01-06 17:33:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-01-06 17:33:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:33:37,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:37,636 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] [2021-01-06 17:33:37,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:37,849 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 17:33:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-01-06 17:33:37,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:37,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851952255] [2021-01-06 17:33:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:37,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:37,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662332940] [2021-01-06 17:33:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:33:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:33:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:38,132 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 17:33:38,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851952255] [2021-01-06 17:33:38,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:38,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662332940] [2021-01-06 17:33:38,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:38,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:38,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244646076] [2021-01-06 17:33:38,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:38,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:38,135 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 8 states. [2021-01-06 17:33:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:38,464 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-01-06 17:33:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:38,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-01-06 17:33:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:38,466 INFO L225 Difference]: With dead ends: 111 [2021-01-06 17:33:38,466 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:33:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:33:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-01-06 17:33:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 17:33:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-01-06 17:33:38,478 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-01-06 17:33:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-01-06 17:33:38,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-01-06 17:33:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:33:38,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:38,480 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] [2021-01-06 17:33:38,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:33:38,693 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 17:33:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:38,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-01-06 17:33:38,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:38,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923853607] [2021-01-06 17:33:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:38,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:38,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658338236] [2021-01-06 17:33:38,718 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 17:33:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:33:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:38,862 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 17:33:38,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923853607] [2021-01-06 17:33:38,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658338236] [2021-01-06 17:33:38,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:38,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:38,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519309031] [2021-01-06 17:33:38,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:38,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:38,864 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 5 states. [2021-01-06 17:33:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:39,043 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-01-06 17:33:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:39,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 17:33:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:39,046 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:33:39,046 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 17:33:39,047 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 17:33:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 17:33:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-01-06 17:33:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 17:33:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-01-06 17:33:39,064 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-01-06 17:33:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:39,064 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-01-06 17:33:39,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-01-06 17:33:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:33:39,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:39,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:39,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:39,281 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 17:33:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-01-06 17:33:39,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:39,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023584206] [2021-01-06 17:33:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:39,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:39,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700845974] [2021-01-06 17:33:39,297 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 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 17:33:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:33:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:39,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023584206] [2021-01-06 17:33:39,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:39,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700845974] [2021-01-06 17:33:39,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:39,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:39,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782663369] [2021-01-06 17:33:39,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:39,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:39,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:39,537 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand 7 states. [2021-01-06 17:33:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:39,778 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-01-06 17:33:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:33:39,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-01-06 17:33:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:39,781 INFO L225 Difference]: With dead ends: 210 [2021-01-06 17:33:39,781 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 17:33:39,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 17:33:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-01-06 17:33:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:33:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-01-06 17:33:39,809 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-01-06 17:33:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:39,809 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-01-06 17:33:39,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-01-06 17:33:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:33:39,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:39,815 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] [2021-01-06 17:33:40,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:40,029 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 17:33:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:40,030 INFO L82 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-01-06 17:33:40,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:40,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540888878] [2021-01-06 17:33:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:40,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:40,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345714963] [2021-01-06 17:33:40,049 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 17:33:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:40,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:40,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540888878] [2021-01-06 17:33:40,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:40,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345714963] [2021-01-06 17:33:40,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:40,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:40,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056804232] [2021-01-06 17:33:40,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:40,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:40,233 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand 6 states. [2021-01-06 17:33:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:40,292 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-01-06 17:33:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:40,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-01-06 17:33:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:40,294 INFO L225 Difference]: With dead ends: 280 [2021-01-06 17:33:40,294 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 17:33:40,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 17:33:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-01-06 17:33:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:33:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-01-06 17:33:40,315 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-01-06 17:33:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:40,315 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-01-06 17:33:40,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-01-06 17:33:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:33:40,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:40,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:40,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:33:40,531 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 17:33:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-01-06 17:33:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:40,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173471497] [2021-01-06 17:33:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:40,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:40,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82246862] [2021-01-06 17:33:40,544 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 17:33:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:33:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:40,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173471497] [2021-01-06 17:33:40,733 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:40,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82246862] [2021-01-06 17:33:40,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:40,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:33:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805497137] [2021-01-06 17:33:40,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:40,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:40,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:40,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:40,735 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand 7 states. [2021-01-06 17:33:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:40,804 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-01-06 17:33:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:40,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 17:33:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:40,807 INFO L225 Difference]: With dead ends: 303 [2021-01-06 17:33:40,807 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 17:33:40,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 17:33:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-01-06 17:33:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 17:33:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-01-06 17:33:40,847 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-01-06 17:33:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:40,849 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-01-06 17:33:40,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-01-06 17:33:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:33:40,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:40,852 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:41,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:33:41,069 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 17:33:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-01-06 17:33:41,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:41,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029191146] [2021-01-06 17:33:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:41,082 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358257906] [2021-01-06 17:33:41,082 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 17:33:41,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:41,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:41,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:33:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:41,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029191146] [2021-01-06 17:33:41,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:41,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358257906] [2021-01-06 17:33:41,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:41,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:41,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95748873] [2021-01-06 17:33:41,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:41,284 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand 8 states. [2021-01-06 17:33:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:41,380 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-01-06 17:33:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:41,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 17:33:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:41,383 INFO L225 Difference]: With dead ends: 223 [2021-01-06 17:33:41,383 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 17:33:41,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 17:33:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-01-06 17:33:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:33:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-01-06 17:33:41,402 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-01-06 17:33:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:41,402 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-01-06 17:33:41,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-01-06 17:33:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:33:41,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:41,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:41,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:33:41,616 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 17:33:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-01-06 17:33:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:41,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900150368] [2021-01-06 17:33:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:41,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:41,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838428436] [2021-01-06 17:33:41,628 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 17:33:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:41,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:33:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900150368] [2021-01-06 17:33:41,932 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838428436] [2021-01-06 17:33:41,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:41,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406794973] [2021-01-06 17:33:41,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:41,934 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand 8 states. [2021-01-06 17:33:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:42,317 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-01-06 17:33:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:33:42,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 17:33:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:42,320 INFO L225 Difference]: With dead ends: 216 [2021-01-06 17:33:42,320 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 17:33:42,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 17:33:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-01-06 17:33:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:33:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-01-06 17:33:42,338 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-01-06 17:33:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:42,338 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-01-06 17:33:42,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-01-06 17:33:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:33:42,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:42,339 INFO L422 BasicCegarLoop]: trace histogram [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 17:33:42,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:42,553 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 17:33:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-01-06 17:33:42,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:42,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627896169] [2021-01-06 17:33:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:42,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:42,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033634458] [2021-01-06 17:33:42,565 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 17:33:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:33:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627896169] [2021-01-06 17:33:42,779 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:42,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033634458] [2021-01-06 17:33:42,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:42,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:42,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902125599] [2021-01-06 17:33:42,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:42,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:42,781 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 9 states. [2021-01-06 17:33:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:43,279 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-01-06 17:33:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:33:43,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2021-01-06 17:33:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:43,283 INFO L225 Difference]: With dead ends: 336 [2021-01-06 17:33:43,283 INFO L226 Difference]: Without dead ends: 334 [2021-01-06 17:33:43,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:33:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-01-06 17:33:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-01-06 17:33:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 17:33:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-01-06 17:33:43,306 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-01-06 17:33:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:43,306 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-01-06 17:33:43,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-01-06 17:33:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:33:43,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:43,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:43,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:33:43,521 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 17:33:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-01-06 17:33:43,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:43,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616712524] [2021-01-06 17:33:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:43,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:43,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209158428] [2021-01-06 17:33:43,532 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 17:33:43,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:33:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:43,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616712524] [2021-01-06 17:33:43,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:43,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209158428] [2021-01-06 17:33:43,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:43,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:33:43,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115755534] [2021-01-06 17:33:43,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:43,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:43,774 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand 10 states. [2021-01-06 17:33:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:43,888 INFO L93 Difference]: Finished difference Result 412 states and 541 transitions. [2021-01-06 17:33:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:43,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2021-01-06 17:33:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:43,890 INFO L225 Difference]: With dead ends: 412 [2021-01-06 17:33:43,891 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 17:33:43,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:33:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 17:33:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2021-01-06 17:33:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 17:33:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2021-01-06 17:33:43,908 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 30 [2021-01-06 17:33:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:43,908 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2021-01-06 17:33:43,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2021-01-06 17:33:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:33:43,909 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:43,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:44,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:33:44,124 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 17:33:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-01-06 17:33:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:44,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516413239] [2021-01-06 17:33:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:44,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:44,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074959256] [2021-01-06 17:33:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:33:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:33:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516413239] [2021-01-06 17:33:44,343 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074959256] [2021-01-06 17:33:44,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:44,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877131467] [2021-01-06 17:33:44,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:44,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:44,345 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 8 states. [2021-01-06 17:33:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:44,438 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2021-01-06 17:33:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:44,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2021-01-06 17:33:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:44,440 INFO L225 Difference]: With dead ends: 217 [2021-01-06 17:33:44,440 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 17:33:44,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 17:33:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2021-01-06 17:33:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 17:33:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2021-01-06 17:33:44,456 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 30 [2021-01-06 17:33:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:44,456 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2021-01-06 17:33:44,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2021-01-06 17:33:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:33:44,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:44,457 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:44,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:33:44,672 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 17:33:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1158562919, now seen corresponding path program 2 times [2021-01-06 17:33:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:44,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203599776] [2021-01-06 17:33:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:44,682 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:44,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981237412] [2021-01-06 17:33:44,682 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 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 17:33:44,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:44,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:44,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:33:44,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203599776] [2021-01-06 17:33:44,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:44,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981237412] [2021-01-06 17:33:44,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:44,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759163351] [2021-01-06 17:33:44,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:44,868 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand 5 states. [2021-01-06 17:33:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:45,012 INFO L93 Difference]: Finished difference Result 251 states and 311 transitions. [2021-01-06 17:33:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:45,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-01-06 17:33:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:45,014 INFO L225 Difference]: With dead ends: 251 [2021-01-06 17:33:45,014 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 17:33:45,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 17:33:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 17:33:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 178. [2021-01-06 17:33:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 17:33:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 219 transitions. [2021-01-06 17:33:45,032 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 219 transitions. Word has length 31 [2021-01-06 17:33:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:45,032 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 219 transitions. [2021-01-06 17:33:45,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 219 transitions. [2021-01-06 17:33:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:33:45,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:45,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:45,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:45,247 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 17:33:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-01-06 17:33:45,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:45,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680028337] [2021-01-06 17:33:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:45,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:45,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774644543] [2021-01-06 17:33:45,258 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 17:33:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:33:45,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:45,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680028337] [2021-01-06 17:33:45,553 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:45,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774644543] [2021-01-06 17:33:45,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:45,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:45,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5549189] [2021-01-06 17:33:45,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:45,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:45,555 INFO L87 Difference]: Start difference. First operand 178 states and 219 transitions. Second operand 9 states. [2021-01-06 17:33:46,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:46,190 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2021-01-06 17:33:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:33:46,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2021-01-06 17:33:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:46,192 INFO L225 Difference]: With dead ends: 246 [2021-01-06 17:33:46,193 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 17:33:46,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:33:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 17:33:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2021-01-06 17:33:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 17:33:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 209 transitions. [2021-01-06 17:33:46,216 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 209 transitions. Word has length 32 [2021-01-06 17:33:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:46,216 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 209 transitions. [2021-01-06 17:33:46,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 209 transitions. [2021-01-06 17:33:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:33:46,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:46,217 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-01-06 17:33:46,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:46,432 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 17:33:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-01-06 17:33:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:46,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869707958] [2021-01-06 17:33:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:46,443 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:46,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270668591] [2021-01-06 17:33:46,444 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 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 17:33:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 17:33:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:46,896 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-01-06 17:33:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:47,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869707958] [2021-01-06 17:33:47,240 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:47,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270668591] [2021-01-06 17:33:47,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:47,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:33:47,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289399536] [2021-01-06 17:33:47,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:33:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:33:47,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:47,242 INFO L87 Difference]: Start difference. First operand 171 states and 209 transitions. Second operand 13 states. [2021-01-06 17:33:47,802 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-01-06 17:33:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:48,470 INFO L93 Difference]: Finished difference Result 250 states and 309 transitions. [2021-01-06 17:33:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:48,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2021-01-06 17:33:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:48,472 INFO L225 Difference]: With dead ends: 250 [2021-01-06 17:33:48,472 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 17:33:48,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:33:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 17:33:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-01-06 17:33:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 17:33:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2021-01-06 17:33:48,492 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 33 [2021-01-06 17:33:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:48,492 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2021-01-06 17:33:48,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:33:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2021-01-06 17:33:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:33:48,493 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:48,493 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-01-06 17:33:48,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:33:48,706 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 17:33:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-01-06 17:33:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:48,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179023465] [2021-01-06 17:33:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:48,721 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:48,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822376014] [2021-01-06 17:33:48,722 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 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 17:33:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:33:48,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:33:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:33:48,889 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:33:48,981 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:33:48,981 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:33:49,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:33:49,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:33:49 BoogieIcfgContainer [2021-01-06 17:33:49,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:33:49,285 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:33:49,285 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:33:49,286 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:33:49,286 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:32" (3/4) ... [2021-01-06 17:33:49,288 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 17:33:49,395 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c-witness.graphml [2021-01-06 17:33:49,395 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:33:49,397 INFO L168 Benchmark]: Toolchain (without parser) took 17746.23 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 126.2 MB in the beginning and 106.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,397 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:33:49,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 115.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,399 INFO L168 Benchmark]: Boogie Preprocessor took 28.49 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 112.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,399 INFO L168 Benchmark]: RCFGBuilder took 639.30 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 127.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,400 INFO L168 Benchmark]: TraceAbstraction took 16603.13 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 127.0 MB in the beginning and 110.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,401 INFO L168 Benchmark]: Witness Printer took 110.43 ms. Allocated memory is still 231.7 MB. Free memory was 110.6 MB in the beginning and 106.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:49,404 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 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 115.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.49 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 112.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 639.30 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 127.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16603.13 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 127.0 MB in the beginning and 110.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. * Witness Printer took 110.43 ms. Allocated memory is still 231.7 MB. Free memory was 110.6 MB in the beginning and 106.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L13] reach_error() VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.4s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 849 SDtfs, 2564 SDslu, 2166 SDs, 0 SdLazy, 1376 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 21 MinimizatonAttempts, 571 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 445 ConstructedInterpolants, 0 QuantifiedInterpolants, 72464 SizeOfPredicates, 130 NumberOfNonLiveVariables, 2419 ConjunctsInSsa, 339 ConjunctsInUnsatCore, 21 InterpolantComputations, 11 PerfectInterpolantSequences, 64/124 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 proved your program to be incorrect! Received shutdown request...