/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:42:45,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:42:45,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:42:45,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:42:45,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:42:45,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:42:45,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:42:45,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:42:45,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:42:45,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:42:45,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:42:45,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:42:45,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:42:45,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:42:45,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:42:45,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:42:45,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:42:45,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:42:45,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:42:45,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:42:45,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:42:45,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:42:45,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:42:45,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:42:45,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:42:45,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:42:45,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:42:45,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:42:45,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:42:45,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:42:45,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:42:45,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:42:45,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:42:45,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:42:45,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:42:45,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:42:45,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:42:45,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:42:45,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:42:45,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:42:45,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:42:45,887 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:42:45,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:42:45,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:42:45,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:42:45,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:42:45,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:42:45,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:42:45,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:42:45,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:42:45,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:42:45,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:42:45,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:42:45,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:42:45,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:42:45,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:42:45,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:42:45,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:42:45,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:42:45,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:42:45,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:42:45,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:42:45,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:42:46,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:42:46,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:42:46,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:42:46,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:42:46,331 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:42:46,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2020-12-23 07:42:46,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f05c3bd2/3e611d8075bb41a5aa53d06eb81e62c0/FLAG4a461b688 [2020-12-23 07:42:46,959 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:42:46,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2020-12-23 07:42:46,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f05c3bd2/3e611d8075bb41a5aa53d06eb81e62c0/FLAG4a461b688 [2020-12-23 07:42:47,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f05c3bd2/3e611d8075bb41a5aa53d06eb81e62c0 [2020-12-23 07:42:47,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:42:47,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:42:47,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:47,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:42:47,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:42:47,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ddc7c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47, skipping insertion in model container [2020-12-23 07:42:47,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:42:47,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:42:47,528 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_valuebound50.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 07:42:47,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:47,564 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:42:47,582 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_valuebound50.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2020-12-23 07:42:47,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:42:47,640 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:42:47,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47 WrapperNode [2020-12-23 07:42:47,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:42:47,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:47,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:42:47,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:42:47,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:42:47,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:42:47,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:42:47,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:42:47,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... [2020-12-23 07:42:47,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:42:47,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:42:47,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:42:47,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:42:47,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:42:47,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:42:47,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:42:47,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:42:47,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:42:48,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:42:48,511 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-23 07:42:48,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:48 BoogieIcfgContainer [2020-12-23 07:42:48,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:42:48,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:42:48,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:42:48,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:42:48,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:42:47" (1/3) ... [2020-12-23 07:42:48,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:48, skipping insertion in model container [2020-12-23 07:42:48,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:42:47" (2/3) ... [2020-12-23 07:42:48,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae2f2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:42:48, skipping insertion in model container [2020-12-23 07:42:48,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:48" (3/3) ... [2020-12-23 07:42:48,529 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2020-12-23 07:42:48,537 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:42:48,542 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 07:42:48,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 07:42:48,591 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:42:48,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:42:48,592 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:42:48,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:42:48,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:42:48,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:42:48,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:42:48,592 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:42:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-23 07:42:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:42:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:48,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:48,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2020-12-23 07:42:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:48,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262289631] [2020-12-23 07:42:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:48,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262289631] [2020-12-23 07:42:48,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:48,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:42:48,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411379724] [2020-12-23 07:42:48,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:42:48,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:42:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:42:48,818 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-23 07:42:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:48,841 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2020-12-23 07:42:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:42:48,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 07:42:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:48,852 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:42:48,853 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:42:48,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:42:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:42:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:42:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:42:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 07:42:48,897 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2020-12-23 07:42:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:48,897 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 07:42:48,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:42:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 07:42:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:42:48,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:48,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:48,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:42:48,899 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2020-12-23 07:42:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:48,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846535601] [2020-12-23 07:42:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:48,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:48,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002411902] [2020-12-23 07:42:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:42:49,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:49,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846535601] [2020-12-23 07:42:49,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:49,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002411902] [2020-12-23 07:42:49,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:49,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:49,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810218760] [2020-12-23 07:42:49,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:49,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:49,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:49,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:49,182 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-12-23 07:42:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:49,389 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-23 07:42:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:42:49,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:42:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:49,392 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:42:49,392 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:42:49,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:42:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-12-23 07:42:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:42:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-23 07:42:49,403 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2020-12-23 07:42:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:49,404 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-23 07:42:49,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-23 07:42:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:42:49,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:49,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:49,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:42:49,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2020-12-23 07:42:49,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:49,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215907426] [2020-12-23 07:42:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:49,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:49,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128595133] [2020-12-23 07:42:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:49,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:50,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215907426] [2020-12-23 07:42:50,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:50,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128595133] [2020-12-23 07:42:50,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:50,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 07:42:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843385230] [2020-12-23 07:42:50,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:42:50,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:42:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:42:50,201 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-12-23 07:42:50,540 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 14 [2020-12-23 07:42:50,693 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-12-23 07:42:50,878 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2020-12-23 07:42:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:50,947 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-12-23 07:42:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:50,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 07:42:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:50,949 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:42:50,949 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:42:50,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:42:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:42:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-23 07:42:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-23 07:42:50,960 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2020-12-23 07:42:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:50,960 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-23 07:42:50,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:42:50,961 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-23 07:42:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:42:50,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:50,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:51,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,175 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2020-12-23 07:42:51,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:51,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24463853] [2020-12-23 07:42:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:51,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:51,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533885872] [2020-12-23 07:42:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:42:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24463853] [2020-12-23 07:42:51,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533885872] [2020-12-23 07:42:51,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:51,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:51,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657137515] [2020-12-23 07:42:51,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:51,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:51,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:51,436 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-12-23 07:42:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:51,703 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 07:42:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:51,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-23 07:42:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:51,705 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:42:51,705 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:42:51,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:42:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-23 07:42:51,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:42:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-12-23 07:42:51,714 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2020-12-23 07:42:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:51,715 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-12-23 07:42:51,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-12-23 07:42:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:42:51,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:51,716 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:51,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,930 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2020-12-23 07:42:51,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:51,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71310863] [2020-12-23 07:42:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:51,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291634961] [2020-12-23 07:42:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:42:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:52,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71310863] [2020-12-23 07:42:52,072 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:52,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291634961] [2020-12-23 07:42:52,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:52,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:42:52,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578830324] [2020-12-23 07:42:52,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:42:52,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:42:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:52,074 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2020-12-23 07:42:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:52,249 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-12-23 07:42:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:42:52,250 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 07:42:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:52,252 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:42:52,252 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:42:52,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:42:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2020-12-23 07:42:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 07:42:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2020-12-23 07:42:52,266 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2020-12-23 07:42:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:52,267 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2020-12-23 07:42:52,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:42:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2020-12-23 07:42:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:42:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:52,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:52,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:52,483 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2020-12-23 07:42:52,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:52,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570218843] [2020-12-23 07:42:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:52,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:52,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886108855] [2020-12-23 07:42:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:42:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570218843] [2020-12-23 07:42:52,677 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:52,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886108855] [2020-12-23 07:42:52,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:52,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:42:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195787203] [2020-12-23 07:42:52,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:52,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:52,681 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 8 states. [2020-12-23 07:42:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:52,893 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-12-23 07:42:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:42:52,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 07:42:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:52,895 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:42:52,895 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:42:52,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:42:52,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-12-23 07:42:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 07:42:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-12-23 07:42:52,911 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2020-12-23 07:42:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:52,911 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-12-23 07:42:52,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-12-23 07:42:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:42:52,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:52,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:53,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:42:53,127 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2020-12-23 07:42:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:53,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456807676] [2020-12-23 07:42:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:53,145 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610278830] [2020-12-23 07:42:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:53,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:42:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:53,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456807676] [2020-12-23 07:42:53,427 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:53,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610278830] [2020-12-23 07:42:53,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:53,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:53,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633863033] [2020-12-23 07:42:53,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:53,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:53,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:53,429 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 9 states. [2020-12-23 07:42:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:53,721 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-12-23 07:42:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:53,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:42:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:53,723 INFO L225 Difference]: With dead ends: 135 [2020-12-23 07:42:53,723 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 07:42:53,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 07:42:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2020-12-23 07:42:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:42:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-12-23 07:42:53,744 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 22 [2020-12-23 07:42:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:53,744 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-12-23 07:42:53,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-12-23 07:42:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:42:53,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:53,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:53,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:53,960 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2020-12-23 07:42:53,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:53,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946273719] [2020-12-23 07:42:53,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:53,977 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:53,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554177352] [2020-12-23 07:42:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:42:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:54,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946273719] [2020-12-23 07:42:54,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:54,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554177352] [2020-12-23 07:42:54,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:54,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:54,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384008877] [2020-12-23 07:42:54,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:54,092 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 5 states. [2020-12-23 07:42:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:54,214 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-12-23 07:42:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:54,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 07:42:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:54,218 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:42:54,218 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 07:42:54,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 07:42:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2020-12-23 07:42:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2020-12-23 07:42:54,251 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 23 [2020-12-23 07:42:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:54,253 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2020-12-23 07:42:54,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2020-12-23 07:42:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:42:54,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:54,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:54,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:54,475 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2020-12-23 07:42:54,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:54,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065432143] [2020-12-23 07:42:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:54,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:54,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687248203] [2020-12-23 07:42:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 07:42:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065432143] [2020-12-23 07:42:54,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687248203] [2020-12-23 07:42:54,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:54,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:54,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569216523] [2020-12-23 07:42:54,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:54,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:54,692 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand 8 states. [2020-12-23 07:42:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:55,000 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-12-23 07:42:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:42:55,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 07:42:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:55,002 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:42:55,002 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 07:42:55,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 07:42:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2020-12-23 07:42:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-12-23 07:42:55,027 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 24 [2020-12-23 07:42:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:55,028 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-12-23 07:42:55,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-12-23 07:42:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:42:55,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:55,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:55,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:42:55,244 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash 151041369, now seen corresponding path program 1 times [2020-12-23 07:42:55,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:55,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037917755] [2020-12-23 07:42:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:55,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:55,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003291292] [2020-12-23 07:42:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:42:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037917755] [2020-12-23 07:42:55,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003291292] [2020-12-23 07:42:55,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:55,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:42:55,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026719944] [2020-12-23 07:42:55,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:42:55,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:42:55,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:42:55,473 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 11 states. [2020-12-23 07:42:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:55,878 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-12-23 07:42:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:42:55,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 07:42:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:55,880 INFO L225 Difference]: With dead ends: 277 [2020-12-23 07:42:55,880 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 07:42:55,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 07:42:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 198. [2020-12-23 07:42:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:42:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2020-12-23 07:42:55,908 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 26 [2020-12-23 07:42:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:55,908 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2020-12-23 07:42:55,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:42:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2020-12-23 07:42:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:42:55,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:55,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:56,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:56,126 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -74821968, now seen corresponding path program 2 times [2020-12-23 07:42:56,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:56,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606627977] [2020-12-23 07:42:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:56,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:56,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616305741] [2020-12-23 07:42:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:56,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:42:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:56,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606627977] [2020-12-23 07:42:56,257 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:56,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616305741] [2020-12-23 07:42:56,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:42:56,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:42:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991423885] [2020-12-23 07:42:56,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:42:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:42:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:42:56,258 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand 5 states. [2020-12-23 07:42:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:56,357 INFO L93 Difference]: Finished difference Result 291 states and 355 transitions. [2020-12-23 07:42:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:42:56,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 07:42:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:56,359 INFO L225 Difference]: With dead ends: 291 [2020-12-23 07:42:56,359 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:56,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:42:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2020-12-23 07:42:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:42:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2020-12-23 07:42:56,379 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 27 [2020-12-23 07:42:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:56,379 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2020-12-23 07:42:56,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:42:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2020-12-23 07:42:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:56,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:56,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:56,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:56,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2020-12-23 07:42:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:56,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051338242] [2020-12-23 07:42:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:56,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:56,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743654778] [2020-12-23 07:42:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:42:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:57,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051338242] [2020-12-23 07:42:57,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:57,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743654778] [2020-12-23 07:42:57,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:57,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:42:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581507420] [2020-12-23 07:42:57,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:42:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:42:57,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:42:57,067 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 13 states. [2020-12-23 07:42:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:57,799 INFO L93 Difference]: Finished difference Result 282 states and 333 transitions. [2020-12-23 07:42:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:42:57,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-23 07:42:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:57,801 INFO L225 Difference]: With dead ends: 282 [2020-12-23 07:42:57,801 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 07:42:57,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:42:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 07:42:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2020-12-23 07:42:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 07:42:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2020-12-23 07:42:57,823 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 32 [2020-12-23 07:42:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:57,823 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2020-12-23 07:42:57,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:42:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2020-12-23 07:42:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:42:57,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:57,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:58,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:42:58,038 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:58,039 INFO L82 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2020-12-23 07:42:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:58,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526830998] [2020-12-23 07:42:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:58,051 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:58,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493344088] [2020-12-23 07:42:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:42:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:58,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526830998] [2020-12-23 07:42:58,232 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493344088] [2020-12-23 07:42:58,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:58,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:42:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77987138] [2020-12-23 07:42:58,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:42:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:42:58,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:42:58,238 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 9 states. [2020-12-23 07:42:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:58,676 INFO L93 Difference]: Finished difference Result 211 states and 244 transitions. [2020-12-23 07:42:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:42:58,676 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-23 07:42:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:58,678 INFO L225 Difference]: With dead ends: 211 [2020-12-23 07:42:58,678 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 07:42:58,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:42:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 07:42:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2020-12-23 07:42:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:42:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2020-12-23 07:42:58,728 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 32 [2020-12-23 07:42:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:58,728 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2020-12-23 07:42:58,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:42:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2020-12-23 07:42:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:58,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:58,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:58,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:42:58,944 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash -315127458, now seen corresponding path program 2 times [2020-12-23 07:42:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853815497] [2020-12-23 07:42:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:58,958 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:58,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951342379] [2020-12-23 07:42:58,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:59,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:42:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:42:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:42:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:59,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853815497] [2020-12-23 07:42:59,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:59,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951342379] [2020-12-23 07:42:59,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:59,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:42:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571037729] [2020-12-23 07:42:59,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:42:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:42:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:42:59,107 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand 8 states. [2020-12-23 07:42:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:42:59,485 INFO L93 Difference]: Finished difference Result 402 states and 471 transitions. [2020-12-23 07:42:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:42:59,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 07:42:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:42:59,488 INFO L225 Difference]: With dead ends: 402 [2020-12-23 07:42:59,488 INFO L226 Difference]: Without dead ends: 398 [2020-12-23 07:42:59,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:42:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-23 07:42:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 221. [2020-12-23 07:42:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-23 07:42:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 265 transitions. [2020-12-23 07:42:59,526 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 265 transitions. Word has length 37 [2020-12-23 07:42:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:42:59,526 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 265 transitions. [2020-12-23 07:42:59,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:42:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 265 transitions. [2020-12-23 07:42:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:42:59,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:42:59,527 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:42:59,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:42:59,731 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:42:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:42:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -188960243, now seen corresponding path program 1 times [2020-12-23 07:42:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:42:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138517039] [2020-12-23 07:42:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:42:59,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:42:59,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620848927] [2020-12-23 07:42:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:42:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:42:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:42:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:42:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:42:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138517039] [2020-12-23 07:42:59,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:42:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620848927] [2020-12-23 07:42:59,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:42:59,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:42:59,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682223011] [2020-12-23 07:42:59,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:42:59,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:42:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:42:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:42:59,969 INFO L87 Difference]: Start difference. First operand 221 states and 265 transitions. Second operand 12 states. [2020-12-23 07:43:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:00,604 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2020-12-23 07:43:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:43:00,605 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-12-23 07:43:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:00,607 INFO L225 Difference]: With dead ends: 363 [2020-12-23 07:43:00,607 INFO L226 Difference]: Without dead ends: 361 [2020-12-23 07:43:00,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:43:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-23 07:43:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 261. [2020-12-23 07:43:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:43:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2020-12-23 07:43:00,643 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 37 [2020-12-23 07:43:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:00,643 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2020-12-23 07:43:00,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:43:00,644 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2020-12-23 07:43:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:43:00,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:00,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:00,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:00,856 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2020-12-23 07:43:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:00,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088035668] [2020-12-23 07:43:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:00,884 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:00,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279685239] [2020-12-23 07:43:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:43:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:43:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088035668] [2020-12-23 07:43:01,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:01,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279685239] [2020-12-23 07:43:01,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:43:01,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:43:01,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089950526] [2020-12-23 07:43:01,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:43:01,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:43:01,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:43:01,016 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand 5 states. [2020-12-23 07:43:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:01,132 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-12-23 07:43:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:43:01,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:43:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:01,134 INFO L225 Difference]: With dead ends: 454 [2020-12-23 07:43:01,134 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 07:43:01,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:43:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 07:43:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2020-12-23 07:43:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 07:43:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 312 transitions. [2020-12-23 07:43:01,183 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 312 transitions. Word has length 38 [2020-12-23 07:43:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:01,184 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 312 transitions. [2020-12-23 07:43:01,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:43:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 312 transitions. [2020-12-23 07:43:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:43:01,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:01,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:01,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:43:01,386 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2020-12-23 07:43:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985273358] [2020-12-23 07:43:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:01,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:01,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943365509] [2020-12-23 07:43:01,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:01,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:43:01,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:43:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:43:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985273358] [2020-12-23 07:43:01,515 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943365509] [2020-12-23 07:43:01,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:43:01,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:43:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970783516] [2020-12-23 07:43:01,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:43:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:43:01,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:43:01,520 INFO L87 Difference]: Start difference. First operand 261 states and 312 transitions. Second operand 5 states. [2020-12-23 07:43:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:01,662 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2020-12-23 07:43:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:43:01,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 07:43:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:01,664 INFO L225 Difference]: With dead ends: 301 [2020-12-23 07:43:01,664 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 07:43:01,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:43:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 07:43:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 288. [2020-12-23 07:43:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-23 07:43:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 345 transitions. [2020-12-23 07:43:01,706 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 345 transitions. Word has length 38 [2020-12-23 07:43:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:01,707 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 345 transitions. [2020-12-23 07:43:01,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:43:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 345 transitions. [2020-12-23 07:43:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:43:01,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:01,708 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:01,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:43:01,922 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2091903451, now seen corresponding path program 1 times [2020-12-23 07:43:01,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:01,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834636566] [2020-12-23 07:43:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:01,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:01,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431932397] [2020-12-23 07:43:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:43:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:02,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834636566] [2020-12-23 07:43:02,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:02,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431932397] [2020-12-23 07:43:02,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:02,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 07:43:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529220147] [2020-12-23 07:43:02,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:43:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:43:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:43:02,379 INFO L87 Difference]: Start difference. First operand 288 states and 345 transitions. Second operand 15 states. [2020-12-23 07:43:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:04,748 INFO L93 Difference]: Finished difference Result 450 states and 519 transitions. [2020-12-23 07:43:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:43:04,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-23 07:43:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:04,750 INFO L225 Difference]: With dead ends: 450 [2020-12-23 07:43:04,750 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 07:43:04,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=578, Invalid=2178, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:43:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 07:43:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 382. [2020-12-23 07:43:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-12-23 07:43:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 470 transitions. [2020-12-23 07:43:04,812 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 470 transitions. Word has length 39 [2020-12-23 07:43:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:04,812 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 470 transitions. [2020-12-23 07:43:04,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:43:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 470 transitions. [2020-12-23 07:43:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:43:04,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:04,813 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:05,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:43:05,027 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2020-12-23 07:43:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:05,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804391579] [2020-12-23 07:43:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:05,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:05,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548136819] [2020-12-23 07:43:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 07:43:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:05,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804391579] [2020-12-23 07:43:05,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:05,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548136819] [2020-12-23 07:43:05,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 07:43:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084057357] [2020-12-23 07:43:05,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:43:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:43:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:43:05,801 INFO L87 Difference]: Start difference. First operand 382 states and 470 transitions. Second operand 18 states. [2020-12-23 07:43:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:07,183 INFO L93 Difference]: Finished difference Result 461 states and 553 transitions. [2020-12-23 07:43:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:43:07,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-12-23 07:43:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:07,187 INFO L225 Difference]: With dead ends: 461 [2020-12-23 07:43:07,187 INFO L226 Difference]: Without dead ends: 459 [2020-12-23 07:43:07,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2020-12-23 07:43:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-12-23 07:43:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 429. [2020-12-23 07:43:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-23 07:43:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 526 transitions. [2020-12-23 07:43:07,260 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 526 transitions. Word has length 41 [2020-12-23 07:43:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:07,260 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 526 transitions. [2020-12-23 07:43:07,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:43:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 526 transitions. [2020-12-23 07:43:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:43:07,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:07,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:07,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:07,477 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1404711062, now seen corresponding path program 1 times [2020-12-23 07:43:07,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:07,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721485946] [2020-12-23 07:43:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:07,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:07,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198639195] [2020-12-23 07:43:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:07,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:43:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:08,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721485946] [2020-12-23 07:43:08,450 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:08,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198639195] [2020-12-23 07:43:08,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:08,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 07:43:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815652711] [2020-12-23 07:43:08,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:43:08,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:43:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:43:08,453 INFO L87 Difference]: Start difference. First operand 429 states and 526 transitions. Second operand 19 states. [2020-12-23 07:43:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:09,779 INFO L93 Difference]: Finished difference Result 535 states and 645 transitions. [2020-12-23 07:43:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:43:09,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-23 07:43:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:09,783 INFO L225 Difference]: With dead ends: 535 [2020-12-23 07:43:09,783 INFO L226 Difference]: Without dead ends: 527 [2020-12-23 07:43:09,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:43:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-12-23 07:43:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 450. [2020-12-23 07:43:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-12-23 07:43:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 550 transitions. [2020-12-23 07:43:09,856 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 550 transitions. Word has length 41 [2020-12-23 07:43:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:09,857 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 550 transitions. [2020-12-23 07:43:09,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:43:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 550 transitions. [2020-12-23 07:43:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 07:43:09,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:09,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:10,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:10,071 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1278543847, now seen corresponding path program 2 times [2020-12-23 07:43:10,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:10,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093940003] [2020-12-23 07:43:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:10,082 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:10,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240433538] [2020-12-23 07:43:10,082 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:10,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:43:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:43:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093940003] [2020-12-23 07:43:10,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240433538] [2020-12-23 07:43:10,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:10,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:43:10,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015516664] [2020-12-23 07:43:10,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:43:10,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:43:10,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:43:10,335 INFO L87 Difference]: Start difference. First operand 450 states and 550 transitions. Second operand 11 states. [2020-12-23 07:43:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:11,074 INFO L93 Difference]: Finished difference Result 501 states and 605 transitions. [2020-12-23 07:43:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:43:11,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-23 07:43:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:11,078 INFO L225 Difference]: With dead ends: 501 [2020-12-23 07:43:11,078 INFO L226 Difference]: Without dead ends: 499 [2020-12-23 07:43:11,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:43:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-23 07:43:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 468. [2020-12-23 07:43:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-12-23 07:43:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 571 transitions. [2020-12-23 07:43:11,159 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 571 transitions. Word has length 41 [2020-12-23 07:43:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:11,159 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 571 transitions. [2020-12-23 07:43:11,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:43:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 571 transitions. [2020-12-23 07:43:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:43:11,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:11,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:11,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:43:11,375 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 2 times [2020-12-23 07:43:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:11,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445342844] [2020-12-23 07:43:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:11,391 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810110115] [2020-12-23 07:43:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:43:11,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:11,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 07:43:11,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:12,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445342844] [2020-12-23 07:43:12,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:12,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810110115] [2020-12-23 07:43:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:12,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:43:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663682498] [2020-12-23 07:43:12,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:43:12,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:43:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:43:12,170 INFO L87 Difference]: Start difference. First operand 468 states and 571 transitions. Second operand 17 states. [2020-12-23 07:43:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:13,677 INFO L93 Difference]: Finished difference Result 604 states and 722 transitions. [2020-12-23 07:43:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:43:13,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:43:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:13,683 INFO L225 Difference]: With dead ends: 604 [2020-12-23 07:43:13,683 INFO L226 Difference]: Without dead ends: 594 [2020-12-23 07:43:13,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:43:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-23 07:43:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 489. [2020-12-23 07:43:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-23 07:43:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 595 transitions. [2020-12-23 07:43:13,769 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 595 transitions. Word has length 46 [2020-12-23 07:43:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:13,769 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 595 transitions. [2020-12-23 07:43:13,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:43:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 595 transitions. [2020-12-23 07:43:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:43:13,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:13,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:13,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:43:13,985 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2102920060, now seen corresponding path program 2 times [2020-12-23 07:43:13,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041607027] [2020-12-23 07:43:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:13,995 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:13,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813581423] [2020-12-23 07:43:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:14,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:43:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:43:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041607027] [2020-12-23 07:43:14,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:14,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813581423] [2020-12-23 07:43:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:43:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998602309] [2020-12-23 07:43:14,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:43:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:43:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:43:14,469 INFO L87 Difference]: Start difference. First operand 489 states and 595 transitions. Second operand 17 states. [2020-12-23 07:43:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:21,652 INFO L93 Difference]: Finished difference Result 633 states and 755 transitions. [2020-12-23 07:43:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:43:21,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:43:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:21,656 INFO L225 Difference]: With dead ends: 633 [2020-12-23 07:43:21,656 INFO L226 Difference]: Without dead ends: 629 [2020-12-23 07:43:21,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:43:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-12-23 07:43:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 507. [2020-12-23 07:43:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-23 07:43:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 615 transitions. [2020-12-23 07:43:21,759 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 615 transitions. Word has length 46 [2020-12-23 07:43:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 615 transitions. [2020-12-23 07:43:21,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:43:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 615 transitions. [2020-12-23 07:43:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:43:21,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:21,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:21,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:21,974 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1437779966, now seen corresponding path program 1 times [2020-12-23 07:43:21,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:21,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961717590] [2020-12-23 07:43:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:21,983 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:21,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320657397] [2020-12-23 07:43:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:43:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:43:22,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:43:22,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961717590] [2020-12-23 07:43:22,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:22,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320657397] [2020-12-23 07:43:22,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:43:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322448919] [2020-12-23 07:43:22,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:43:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:43:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:43:22,302 INFO L87 Difference]: Start difference. First operand 507 states and 615 transitions. Second operand 13 states. [2020-12-23 07:43:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:23,300 INFO L93 Difference]: Finished difference Result 723 states and 875 transitions. [2020-12-23 07:43:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:43:23,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-23 07:43:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:23,304 INFO L225 Difference]: With dead ends: 723 [2020-12-23 07:43:23,305 INFO L226 Difference]: Without dead ends: 721 [2020-12-23 07:43:23,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:43:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-12-23 07:43:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 603. [2020-12-23 07:43:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-23 07:43:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 729 transitions. [2020-12-23 07:43:23,419 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 729 transitions. Word has length 49 [2020-12-23 07:43:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:23,419 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 729 transitions. [2020-12-23 07:43:23,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:43:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 729 transitions. [2020-12-23 07:43:23,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:43:23,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:23,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:23,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:43:23,634 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1323606593, now seen corresponding path program 3 times [2020-12-23 07:43:23,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:23,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599426644] [2020-12-23 07:43:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:23,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:23,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318402042] [2020-12-23 07:43:23,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:23,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:43:23,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 07:43:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:43:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599426644] [2020-12-23 07:43:24,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:24,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318402042] [2020-12-23 07:43:24,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:24,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:43:24,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408558955] [2020-12-23 07:43:24,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:43:24,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:43:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:43:24,049 INFO L87 Difference]: Start difference. First operand 603 states and 729 transitions. Second operand 12 states. [2020-12-23 07:43:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:43:28,906 INFO L93 Difference]: Finished difference Result 752 states and 897 transitions. [2020-12-23 07:43:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:43:28,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-12-23 07:43:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:43:28,910 INFO L225 Difference]: With dead ends: 752 [2020-12-23 07:43:28,911 INFO L226 Difference]: Without dead ends: 744 [2020-12-23 07:43:28,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:43:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-12-23 07:43:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 620. [2020-12-23 07:43:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-12-23 07:43:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 748 transitions. [2020-12-23 07:43:29,033 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 748 transitions. Word has length 50 [2020-12-23 07:43:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:43:29,033 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 748 transitions. [2020-12-23 07:43:29,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:43:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 748 transitions. [2020-12-23 07:43:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:43:29,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:43:29,034 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:43:29,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:29,248 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:43:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:43:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1449773808, now seen corresponding path program 3 times [2020-12-23 07:43:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:43:29,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513368725] [2020-12-23 07:43:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:43:29,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:43:29,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762611696] [2020-12-23 07:43:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:43:29,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:43:29,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:43:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:43:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:43:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:43:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513368725] [2020-12-23 07:43:31,840 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:43:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762611696] [2020-12-23 07:43:31,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:43:31,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:43:31,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78011311] [2020-12-23 07:43:31,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:43:31,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:43:31,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:43:31,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=40, Unknown=1, NotChecked=0, Total=56 [2020-12-23 07:43:31,842 INFO L87 Difference]: Start difference. First operand 620 states and 748 transitions. Second operand 8 states. [2020-12-23 07:45:06,591 WARN L197 SmtUtils]: Spent 18.99 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-23 07:45:50,223 WARN L197 SmtUtils]: Spent 25.46 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-23 07:46:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:12,854 INFO L93 Difference]: Finished difference Result 635 states and 758 transitions. [2020-12-23 07:46:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:46:12,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-12-23 07:46:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:12,861 INFO L225 Difference]: With dead ends: 635 [2020-12-23 07:46:12,861 INFO L226 Difference]: Without dead ends: 633 [2020-12-23 07:46:12,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 97.3s TimeCoverageRelationStatistics Valid=102, Invalid=218, Unknown=22, NotChecked=0, Total=342 [2020-12-23 07:46:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-12-23 07:46:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 443. [2020-12-23 07:46:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 07:46:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 529 transitions. [2020-12-23 07:46:12,958 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 529 transitions. Word has length 50 [2020-12-23 07:46:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:12,959 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 529 transitions. [2020-12-23 07:46:12,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:46:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 529 transitions. [2020-12-23 07:46:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:46:12,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:12,960 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:13,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:46:13,161 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 272025232, now seen corresponding path program 2 times [2020-12-23 07:46:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269518788] [2020-12-23 07:46:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:13,171 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:13,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626921453] [2020-12-23 07:46:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:13,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:46:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:46:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:13,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269518788] [2020-12-23 07:46:13,892 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:13,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626921453] [2020-12-23 07:46:13,893 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:46:13,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:13,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:46:13,893 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:46:13,893 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:46:14,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:46:14,132 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:46:14,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:46:14 BoogieIcfgContainer [2020-12-23 07:46:14,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:46:14,133 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:46:14,133 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:46:14,134 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:46:14,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:42:48" (3/4) ... [2020-12-23 07:46:14,137 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:46:14,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:46:14,138 INFO L168 Benchmark]: Toolchain (without parser) took 206785.98 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 125.1 MB in the beginning and 156.7 MB in the end (delta: -31.6 MB). Peak memory consumption was 195.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,139 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:46:14,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.02 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 114.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,140 INFO L168 Benchmark]: Boogie Preprocessor took 61.12 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 111.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,140 INFO L168 Benchmark]: RCFGBuilder took 732.70 ms. Allocated memory is still 151.0 MB. Free memory was 111.6 MB in the beginning and 129.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,141 INFO L168 Benchmark]: TraceAbstraction took 205615.58 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 129.3 MB in the beginning and 157.2 MB in the end (delta: -27.9 MB). Peak memory consumption was 198.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,141 INFO L168 Benchmark]: Witness Printer took 4.13 ms. Allocated memory is still 377.5 MB. Free memory was 157.2 MB in the beginning and 156.7 MB in the end (delta: 539.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:14,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.02 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 114.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 74.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.12 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 111.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 732.70 ms. Allocated memory is still 151.0 MB. Free memory was 111.6 MB in the beginning and 129.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 205615.58 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 129.3 MB in the beginning and 157.2 MB in the end (delta: -27.9 MB). Peak memory consumption was 198.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.13 ms. Allocated memory is still 377.5 MB. Free memory was 157.2 MB in the beginning and 156.7 MB in the end (delta: 539.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 205.5s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 186.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 993 SDtfs, 4133 SDslu, 4173 SDs, 0 SdLazy, 5923 SolverSat, 714 SolverUnsat, 37 SolverUnknown, 0 SolverNotchecked, 80.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1076 GetRequests, 622 SyntacticMatches, 4 SemanticMatches, 450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 109.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=620occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 1563 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 845 NumberOfCodeBlocks, 792 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 819 ConstructedInterpolants, 0 QuantifiedInterpolants, 337378 SizeOfPredicates, 320 NumberOfNonLiveVariables, 3338 ConjunctsInSsa, 824 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 86/340 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...