/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/egcd2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:38:19,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:38:19,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:38:20,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:38:20,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:38:20,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:38:20,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:38:20,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:38:20,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:38:20,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:38:20,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:38:20,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:38:20,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:38:20,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:38:20,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:38:20,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:38:20,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:38:20,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:38:20,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:38:20,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:38:20,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:38:20,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:38:20,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:38:20,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:38:20,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:38:20,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:38:20,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:38:20,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:38:20,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:38:20,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:38:20,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:38:20,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:38:20,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:38:20,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:38:20,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:38:20,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:38:20,117 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 07:38:20,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:38:20,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:38:20,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:38:20,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:38:20,174 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:38:20,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:38:20,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:38:20,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:38:20,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:38:20,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:38:20,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:38:20,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:38:20,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:38:20,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:38:20,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:38:20,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:38:20,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:38:20,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:38:20,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:38:20,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:38:20,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:38:20,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:38:20,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:38:20,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:38:20,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:38:20,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:38:20,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:38:20,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:38:20,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:38:20,611 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:38:20,611 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:38:20,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2020-12-23 07:38:20,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b55813fc1/0c3a349dab71485c95d2baa6d14b32d2/FLAGd134c7f3c [2020-12-23 07:38:21,264 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:38:21,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2020-12-23 07:38:21,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b55813fc1/0c3a349dab71485c95d2baa6d14b32d2/FLAGd134c7f3c [2020-12-23 07:38:21,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b55813fc1/0c3a349dab71485c95d2baa6d14b32d2 [2020-12-23 07:38:21,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:38:21,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:38:21,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:38:21,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:38:21,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:38:21,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:38:21" (1/1) ... [2020-12-23 07:38:21,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ae14a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:21, skipping insertion in model container [2020-12-23 07:38:21,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:38:21" (1/1) ... [2020-12-23 07:38:21,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:38:21,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:38:21,914 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/egcd2-ll_unwindbound50.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[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~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[~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 07:38:21,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:38:21,953 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:38:21,968 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/egcd2-ll_unwindbound50.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[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yy~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[~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 07:38:21,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:38:22,007 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:38:22,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22 WrapperNode [2020-12-23 07:38:22,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:38:22,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:38:22,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:38:22,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:38:22,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:38:22,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:38:22,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:38:22,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:38:22,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (1/1) ... [2020-12-23 07:38:22,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:38:22,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:38:22,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:38:22,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:38:22,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (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 07:38:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:38:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:38:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:38:22,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:38:22,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:38:22,604 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2020-12-23 07:38:22,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:38:22 BoogieIcfgContainer [2020-12-23 07:38:22,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:38:22,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:38:22,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:38:22,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:38:22,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:38:21" (1/3) ... [2020-12-23 07:38:22,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa39b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:38:22, skipping insertion in model container [2020-12-23 07:38:22,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:38:22" (2/3) ... [2020-12-23 07:38:22,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa39b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:38:22, skipping insertion in model container [2020-12-23 07:38:22,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:38:22" (3/3) ... [2020-12-23 07:38:22,617 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2020-12-23 07:38:22,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:38:22,631 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-23 07:38:22,653 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-23 07:38:22,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:38:22,704 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:38:22,704 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:38:22,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:38:22,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:38:22,705 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:38:22,707 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:38:22,707 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:38:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-12-23 07:38:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:38:22,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:22,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:22,738 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:22,745 INFO L82 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2020-12-23 07:38:22,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:22,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273161978] [2020-12-23 07:38:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:22,915 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 07:38:22,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273161978] [2020-12-23 07:38:22,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:22,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:38:22,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297013761] [2020-12-23 07:38:22,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:38:22,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:38:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:38:22,941 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-12-23 07:38:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:22,964 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-12-23 07:38:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:38:22,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-23 07:38:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:22,976 INFO L225 Difference]: With dead ends: 83 [2020-12-23 07:38:22,976 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:38:22,980 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 07:38:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:38:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 07:38:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:38:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-23 07:38:23,020 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2020-12-23 07:38:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:23,020 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-23 07:38:23,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:38:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-23 07:38:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:38:23,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:23,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:23,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:38:23,022 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2020-12-23 07:38:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:23,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178777358] [2020-12-23 07:38:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:23,045 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:23,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937028113] [2020-12-23 07:38:23,045 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 07:38:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:38:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:23,213 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 07:38:23,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178777358] [2020-12-23 07:38:23,214 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:23,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937028113] [2020-12-23 07:38:23,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:23,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:38:23,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759576322] [2020-12-23 07:38:23,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:38:23,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:38:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:38:23,219 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-12-23 07:38:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:23,247 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 07:38:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:38:23,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 07:38:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:23,250 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:38:23,250 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:38:23,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:38:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:38:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:38:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:38:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-23 07:38:23,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2020-12-23 07:38:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:23,260 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-23 07:38:23,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:38:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-23 07:38:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:38:23,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:23,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:23,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:38:23,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2020-12-23 07:38:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:23,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636235798] [2020-12-23 07:38:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:23,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:23,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221806048] [2020-12-23 07:38:23,499 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 07:38:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:38:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:23,627 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 07:38:23,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636235798] [2020-12-23 07:38:23,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:23,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221806048] [2020-12-23 07:38:23,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:38:23,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254792820] [2020-12-23 07:38:23,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:38:23,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:23,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:38:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:38:23,631 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-12-23 07:38:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:23,727 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-23 07:38:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:38:23,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:38:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:23,729 INFO L225 Difference]: With dead ends: 69 [2020-12-23 07:38:23,729 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:38:23,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 07:38:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:38:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-12-23 07:38:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:38:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-23 07:38:23,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2020-12-23 07:38:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:23,739 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-23 07:38:23,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:38:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-23 07:38:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:38:23,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:23,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:23,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:23,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2020-12-23 07:38:23,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:23,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553840407] [2020-12-23 07:38:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:23,973 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722526109] [2020-12-23 07:38:23,974 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 07:38:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:38:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:24,160 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 07:38:24,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553840407] [2020-12-23 07:38:24,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:24,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722526109] [2020-12-23 07:38:24,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:24,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:38:24,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705154267] [2020-12-23 07:38:24,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:24,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:24,166 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-12-23 07:38:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:24,432 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-23 07:38:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:24,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 07:38:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:24,436 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:38:24,436 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:38:24,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:38:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:38:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2020-12-23 07:38:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 07:38:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-23 07:38:24,449 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-12-23 07:38:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:24,450 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-23 07:38:24,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-23 07:38:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:38:24,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:24,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:24,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:24,662 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2020-12-23 07:38:24,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:24,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957982339] [2020-12-23 07:38:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:24,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:24,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250674357] [2020-12-23 07:38:24,681 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 07:38:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:38:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:24,887 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 07:38:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957982339] [2020-12-23 07:38:24,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:24,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250674357] [2020-12-23 07:38:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:38:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131446263] [2020-12-23 07:38:24,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:24,891 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-12-23 07:38:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:25,045 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-23 07:38:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:25,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-23 07:38:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:25,047 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:38:25,047 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:38:25,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:38:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-12-23 07:38:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:38:25,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-23 07:38:25,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2020-12-23 07:38:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:25,058 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-23 07:38:25,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:25,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-23 07:38:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:38:25,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:25,059 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 07:38:25,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:25,274 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2020-12-23 07:38:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:25,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064250421] [2020-12-23 07:38:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:25,300 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:25,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146868777] [2020-12-23 07:38:25,301 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 07:38:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:38:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064250421] [2020-12-23 07:38:25,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146868777] [2020-12-23 07:38:25,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:25,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:38:25,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292910184] [2020-12-23 07:38:25,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:38:25,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:25,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:38:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:38:25,411 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 5 states. [2020-12-23 07:38:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:25,434 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-12-23 07:38:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:38:25,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-23 07:38:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:25,436 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:38:25,437 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 07:38:25,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:38:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 07:38:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 07:38:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:38:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-12-23 07:38:25,448 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2020-12-23 07:38:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:25,448 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-12-23 07:38:25,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:38:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-12-23 07:38:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:38:25,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:25,450 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] [2020-12-23 07:38:25,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:38:25,666 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2020-12-23 07:38:25,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:25,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113382409] [2020-12-23 07:38:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:25,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:25,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257389289] [2020-12-23 07:38:25,681 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 07:38:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:25,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:38:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:25,888 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 07:38:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113382409] [2020-12-23 07:38:25,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257389289] [2020-12-23 07:38:25,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:25,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:38:25,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524397246] [2020-12-23 07:38:25,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:25,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:25,892 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 8 states. [2020-12-23 07:38:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:26,062 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-23 07:38:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:26,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-23 07:38:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:26,063 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:38:26,063 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:38:26,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:38:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-23 07:38:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:38:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-23 07:38:26,071 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-23 07:38:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:26,072 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-23 07:38:26,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:26,072 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-23 07:38:26,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:38:26,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:26,073 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] [2020-12-23 07:38:26,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:26,286 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:26,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2020-12-23 07:38:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:26,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264512154] [2020-12-23 07:38:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:26,306 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:26,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447739278] [2020-12-23 07:38:26,307 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 07:38:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:38:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:26,552 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 07:38:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264512154] [2020-12-23 07:38:26,553 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447739278] [2020-12-23 07:38:26,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:26,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 07:38:26,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715624310] [2020-12-23 07:38:26,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:38:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:38:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:38:26,555 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 9 states. [2020-12-23 07:38:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:28,769 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-12-23 07:38:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:38:28,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:38:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:28,770 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:38:28,771 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:38:28,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:38:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:38:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-12-23 07:38:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:38:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-12-23 07:38:28,780 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-12-23 07:38:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:28,780 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-12-23 07:38:28,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:38:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-12-23 07:38:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:38:28,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:28,781 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] [2020-12-23 07:38:28,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:28,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:28,998 INFO L82 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2020-12-23 07:38:28,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:28,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225779110] [2020-12-23 07:38:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:29,016 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:29,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372443906] [2020-12-23 07:38:29,016 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 07:38:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:38:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:29,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225779110] [2020-12-23 07:38:29,162 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:29,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372443906] [2020-12-23 07:38:29,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:29,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:38:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274474333] [2020-12-23 07:38:29,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:38:29,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:38:29,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:38:29,164 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 6 states. [2020-12-23 07:38:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:29,358 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-12-23 07:38:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:38:29,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-23 07:38:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:29,362 INFO L225 Difference]: With dead ends: 108 [2020-12-23 07:38:29,362 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 07:38:29,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:38:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 07:38:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-12-23 07:38:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 07:38:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-12-23 07:38:29,394 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2020-12-23 07:38:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:29,394 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-12-23 07:38:29,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:38:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-12-23 07:38:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:38:29,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:29,400 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:38:29,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:38:29,615 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2020-12-23 07:38:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:29,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192800114] [2020-12-23 07:38:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:29,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:29,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764732536] [2020-12-23 07:38:29,627 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 07:38:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:29,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:38:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:29,757 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 07:38:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192800114] [2020-12-23 07:38:29,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764732536] [2020-12-23 07:38:29,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:29,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:38:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524017784] [2020-12-23 07:38:29,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:38:29,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:38:29,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:38:29,760 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 6 states. [2020-12-23 07:38:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:29,797 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-12-23 07:38:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:38:29,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-23 07:38:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:29,798 INFO L225 Difference]: With dead ends: 89 [2020-12-23 07:38:29,798 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 07:38:29,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:38:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 07:38:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 07:38:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 07:38:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-12-23 07:38:29,810 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2020-12-23 07:38:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:29,810 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-12-23 07:38:29,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:38:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-12-23 07:38:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:38:29,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:29,811 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] [2020-12-23 07:38:30,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:30,025 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:30,027 INFO L82 PathProgramCache]: Analyzing trace with hash -134066994, now seen corresponding path program 1 times [2020-12-23 07:38:30,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:30,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589193596] [2020-12-23 07:38:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:30,037 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:30,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987935676] [2020-12-23 07:38:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:38:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:30,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589193596] [2020-12-23 07:38:30,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987935676] [2020-12-23 07:38:30,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:30,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:38:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257040535] [2020-12-23 07:38:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:38:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:38:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:38:30,180 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 7 states. [2020-12-23 07:38:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:30,428 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2020-12-23 07:38:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:38:30,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-23 07:38:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:30,430 INFO L225 Difference]: With dead ends: 232 [2020-12-23 07:38:30,431 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 07:38:30,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:38:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 07:38:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2020-12-23 07:38:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 07:38:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-12-23 07:38:30,473 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2020-12-23 07:38:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:30,475 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-12-23 07:38:30,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:38:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-12-23 07:38:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:38:30,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:30,478 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] [2020-12-23 07:38:30,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:30,692 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 966792015, now seen corresponding path program 1 times [2020-12-23 07:38:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511163238] [2020-12-23 07:38:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:30,704 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:30,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219403984] [2020-12-23 07:38:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:38:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:38:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511163238] [2020-12-23 07:38:30,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219403984] [2020-12-23 07:38:30,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:30,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:38:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308767555] [2020-12-23 07:38:30,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:38:30,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:38:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:38:30,830 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 6 states. [2020-12-23 07:38:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:30,873 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-12-23 07:38:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:38:30,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-23 07:38:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:30,875 INFO L225 Difference]: With dead ends: 179 [2020-12-23 07:38:30,875 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:38:30,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:38:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:38:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-12-23 07:38:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 07:38:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2020-12-23 07:38:30,892 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2020-12-23 07:38:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:30,892 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2020-12-23 07:38:30,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:38:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2020-12-23 07:38:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:38:30,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:30,893 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 07:38:31,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:38:31,107 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash 302394158, now seen corresponding path program 1 times [2020-12-23 07:38:31,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:31,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544328415] [2020-12-23 07:38:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:31,118 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:31,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738472945] [2020-12-23 07:38:31,119 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 07:38:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:38:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:31,325 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 07:38:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544328415] [2020-12-23 07:38:31,326 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:31,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738472945] [2020-12-23 07:38:31,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:31,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:38:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922171278] [2020-12-23 07:38:31,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:31,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:31,328 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand 8 states. [2020-12-23 07:38:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:31,499 INFO L93 Difference]: Finished difference Result 208 states and 267 transitions. [2020-12-23 07:38:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:31,499 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 07:38:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:31,501 INFO L225 Difference]: With dead ends: 208 [2020-12-23 07:38:31,501 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 07:38:31,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:38:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 07:38:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 189. [2020-12-23 07:38:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 07:38:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 250 transitions. [2020-12-23 07:38:31,521 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 250 transitions. Word has length 32 [2020-12-23 07:38:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:31,521 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 250 transitions. [2020-12-23 07:38:31,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2020-12-23 07:38:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:38:31,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:31,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:31,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:38:31,736 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2001825622, now seen corresponding path program 1 times [2020-12-23 07:38:31,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:31,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312205084] [2020-12-23 07:38:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:31,746 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:31,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091650609] [2020-12-23 07:38:31,746 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 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 07:38:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:38:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:31,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312205084] [2020-12-23 07:38:31,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091650609] [2020-12-23 07:38:31,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:31,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:38:31,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104702035] [2020-12-23 07:38:31,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:38:31,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:38:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:38:31,903 INFO L87 Difference]: Start difference. First operand 189 states and 250 transitions. Second operand 7 states. [2020-12-23 07:38:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:31,964 INFO L93 Difference]: Finished difference Result 327 states and 437 transitions. [2020-12-23 07:38:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:31,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 07:38:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:31,966 INFO L225 Difference]: With dead ends: 327 [2020-12-23 07:38:31,966 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 07:38:31,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:38:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 07:38:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-12-23 07:38:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:38:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2020-12-23 07:38:31,995 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 34 [2020-12-23 07:38:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:31,996 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2020-12-23 07:38:31,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:38:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2020-12-23 07:38:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:38:31,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:31,997 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:38:32,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:38:32,212 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1456833039, now seen corresponding path program 1 times [2020-12-23 07:38:32,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:32,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027746896] [2020-12-23 07:38:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:32,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:32,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982392888] [2020-12-23 07:38:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:38:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:38:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:32,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027746896] [2020-12-23 07:38:32,474 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:32,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982392888] [2020-12-23 07:38:32,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:32,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:38:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028213669] [2020-12-23 07:38:32,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:38:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:38:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:38:32,476 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 10 states. [2020-12-23 07:38:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:32,792 INFO L93 Difference]: Finished difference Result 208 states and 265 transitions. [2020-12-23 07:38:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:38:32,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 07:38:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:32,794 INFO L225 Difference]: With dead ends: 208 [2020-12-23 07:38:32,794 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 07:38:32,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:38:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 07:38:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2020-12-23 07:38:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:38:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2020-12-23 07:38:32,820 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 34 [2020-12-23 07:38:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:32,821 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2020-12-23 07:38:32,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:38:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2020-12-23 07:38:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:38:32,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:32,822 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:38:33,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:33,036 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 142945620, now seen corresponding path program 1 times [2020-12-23 07:38:33,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:33,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072126897] [2020-12-23 07:38:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:33,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:33,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978091710] [2020-12-23 07:38:33,055 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 07:38:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 07:38:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:33,643 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 07:38:33,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072126897] [2020-12-23 07:38:33,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:33,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978091710] [2020-12-23 07:38:33,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:33,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:38:33,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912798712] [2020-12-23 07:38:33,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:38:33,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:33,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:38:33,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:38:33,646 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand 13 states. [2020-12-23 07:38:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:34,163 INFO L93 Difference]: Finished difference Result 225 states and 288 transitions. [2020-12-23 07:38:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:38:34,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-12-23 07:38:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:34,165 INFO L225 Difference]: With dead ends: 225 [2020-12-23 07:38:34,166 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 07:38:34,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-23 07:38:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 07:38:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-12-23 07:38:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 07:38:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2020-12-23 07:38:34,187 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 36 [2020-12-23 07:38:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:34,188 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2020-12-23 07:38:34,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:38:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2020-12-23 07:38:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:38:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:34,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:34,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:38:34,405 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1084150885, now seen corresponding path program 2 times [2020-12-23 07:38:34,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:34,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423714401] [2020-12-23 07:38:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:34,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:34,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956870234] [2020-12-23 07:38:34,422 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 07:38:34,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:38:34,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:38:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:34,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423714401] [2020-12-23 07:38:34,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:34,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956870234] [2020-12-23 07:38:34,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:34,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:38:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935262936] [2020-12-23 07:38:34,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:38:34,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:38:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:34,737 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand 11 states. [2020-12-23 07:38:35,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:35,079 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-12-23 07:38:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:38:35,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 07:38:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:35,082 INFO L225 Difference]: With dead ends: 212 [2020-12-23 07:38:35,082 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 07:38:35,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:38:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 07:38:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 199. [2020-12-23 07:38:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 07:38:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2020-12-23 07:38:35,114 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 36 [2020-12-23 07:38:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:35,114 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2020-12-23 07:38:35,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:38:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2020-12-23 07:38:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 07:38:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:35,115 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] [2020-12-23 07:38:35,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:38:35,329 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1970211809, now seen corresponding path program 1 times [2020-12-23 07:38:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:35,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376934098] [2020-12-23 07:38:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:35,338 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:35,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119764356] [2020-12-23 07:38:35,339 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 07:38:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:35,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:38:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:35,489 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 07:38:35,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376934098] [2020-12-23 07:38:35,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:35,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119764356] [2020-12-23 07:38:35,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:35,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:38:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582989786] [2020-12-23 07:38:35,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:38:35,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:35,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:38:35,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:38:35,494 INFO L87 Difference]: Start difference. First operand 199 states and 256 transitions. Second operand 7 states. [2020-12-23 07:38:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:35,574 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2020-12-23 07:38:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:38:35,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-12-23 07:38:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:35,578 INFO L225 Difference]: With dead ends: 206 [2020-12-23 07:38:35,578 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 07:38:35,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:38:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 07:38:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-23 07:38:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 07:38:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 259 transitions. [2020-12-23 07:38:35,601 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 259 transitions. Word has length 38 [2020-12-23 07:38:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:35,601 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 259 transitions. [2020-12-23 07:38:35,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:38:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 259 transitions. [2020-12-23 07:38:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:38:35,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:35,603 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:38:35,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:38:35,817 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash -947205511, now seen corresponding path program 1 times [2020-12-23 07:38:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:35,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321975161] [2020-12-23 07:38:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:35,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:35,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683870462] [2020-12-23 07:38:35,830 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 07:38:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:38:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:36,161 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 07:38:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321975161] [2020-12-23 07:38:36,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683870462] [2020-12-23 07:38:36,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:38:36,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253977673] [2020-12-23 07:38:36,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:38:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:38:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:36,163 INFO L87 Difference]: Start difference. First operand 202 states and 259 transitions. Second operand 11 states. [2020-12-23 07:38:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:36,864 INFO L93 Difference]: Finished difference Result 239 states and 302 transitions. [2020-12-23 07:38:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:38:36,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-12-23 07:38:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:36,866 INFO L225 Difference]: With dead ends: 239 [2020-12-23 07:38:36,866 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 07:38:36,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:38:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 07:38:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2020-12-23 07:38:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 07:38:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2020-12-23 07:38:36,888 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 39 [2020-12-23 07:38:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:36,888 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2020-12-23 07:38:36,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:38:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2020-12-23 07:38:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:38:36,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:36,889 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:37,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:37,103 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash 170255994, now seen corresponding path program 2 times [2020-12-23 07:38:37,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:37,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848651360] [2020-12-23 07:38:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:37,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:37,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116240538] [2020-12-23 07:38:37,113 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 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 07:38:37,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:38:37,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:38:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848651360] [2020-12-23 07:38:37,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116240538] [2020-12-23 07:38:37,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:37,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:38:37,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932663668] [2020-12-23 07:38:37,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:37,284 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand 8 states. [2020-12-23 07:38:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:37,379 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2020-12-23 07:38:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:38:37,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-23 07:38:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:37,381 INFO L225 Difference]: With dead ends: 250 [2020-12-23 07:38:37,381 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 07:38:37,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 07:38:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2020-12-23 07:38:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-23 07:38:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2020-12-23 07:38:37,405 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2020-12-23 07:38:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:37,405 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2020-12-23 07:38:37,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2020-12-23 07:38:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:38:37,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:37,406 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] [2020-12-23 07:38:37,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:37,621 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:37,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1229525663, now seen corresponding path program 1 times [2020-12-23 07:38:37,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:37,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045718533] [2020-12-23 07:38:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:37,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:37,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659017626] [2020-12-23 07:38:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:38:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045718533] [2020-12-23 07:38:37,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659017626] [2020-12-23 07:38:37,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:37,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:38:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288792687] [2020-12-23 07:38:37,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:38:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:38:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:38:37,780 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand 8 states. [2020-12-23 07:38:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:37,860 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2020-12-23 07:38:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:38:37,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-23 07:38:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:37,862 INFO L225 Difference]: With dead ends: 368 [2020-12-23 07:38:37,862 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 07:38:37,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:38:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 07:38:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-12-23 07:38:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 07:38:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2020-12-23 07:38:37,885 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2020-12-23 07:38:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:37,885 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2020-12-23 07:38:37,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:38:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2020-12-23 07:38:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:38:37,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:37,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:38,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:38:38,100 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -613640578, now seen corresponding path program 2 times [2020-12-23 07:38:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:38,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325041298] [2020-12-23 07:38:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:38,111 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:38,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583002075] [2020-12-23 07:38:38,112 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 07:38:38,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:38:38,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:38:38,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:38,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325041298] [2020-12-23 07:38:38,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:38,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583002075] [2020-12-23 07:38:38,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:38:38,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:38:38,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969331787] [2020-12-23 07:38:38,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:38:38,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:38:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:38:38,253 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand 5 states. [2020-12-23 07:38:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:38,389 INFO L93 Difference]: Finished difference Result 465 states and 602 transitions. [2020-12-23 07:38:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:38:38,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-23 07:38:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:38,392 INFO L225 Difference]: With dead ends: 465 [2020-12-23 07:38:38,392 INFO L226 Difference]: Without dead ends: 364 [2020-12-23 07:38:38,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 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 07:38:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-12-23 07:38:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2020-12-23 07:38:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 07:38:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2020-12-23 07:38:38,421 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 46 [2020-12-23 07:38:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:38,421 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2020-12-23 07:38:38,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:38:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2020-12-23 07:38:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:38:38,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:38,422 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] [2020-12-23 07:38:38,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:38:38,636 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:38,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2041640631, now seen corresponding path program 1 times [2020-12-23 07:38:38,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:38,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625690690] [2020-12-23 07:38:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:38,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:38,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613255482] [2020-12-23 07:38:38,646 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 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 07:38:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:38:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:38:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:39,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625690690] [2020-12-23 07:38:39,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:39,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613255482] [2020-12-23 07:38:39,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:39,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:38:39,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348136436] [2020-12-23 07:38:39,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:38:39,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:38:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:38:39,389 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand 13 states. [2020-12-23 07:38:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:50,840 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2020-12-23 07:38:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:38:50,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 07:38:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:50,842 INFO L225 Difference]: With dead ends: 306 [2020-12-23 07:38:50,842 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 07:38:50,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:38:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 07:38:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2020-12-23 07:38:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 07:38:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2020-12-23 07:38:50,874 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 46 [2020-12-23 07:38:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:50,875 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2020-12-23 07:38:50,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:38:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2020-12-23 07:38:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:38:50,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:50,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:38:51,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:51,090 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1100435366, now seen corresponding path program 3 times [2020-12-23 07:38:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299053761] [2020-12-23 07:38:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:51,100 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:51,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988644328] [2020-12-23 07:38:51,101 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 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 07:38:51,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:38:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:38:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 07:38:51,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299053761] [2020-12-23 07:38:51,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:51,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988644328] [2020-12-23 07:38:51,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:51,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:38:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976165631] [2020-12-23 07:38:51,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:38:51,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:38:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:38:51,245 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand 5 states. [2020-12-23 07:38:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:51,373 INFO L93 Difference]: Finished difference Result 286 states and 365 transitions. [2020-12-23 07:38:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:38:51,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-23 07:38:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:51,375 INFO L225 Difference]: With dead ends: 286 [2020-12-23 07:38:51,375 INFO L226 Difference]: Without dead ends: 284 [2020-12-23 07:38:51,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:38:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-23 07:38:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2020-12-23 07:38:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 07:38:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2020-12-23 07:38:51,414 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 46 [2020-12-23 07:38:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:51,414 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2020-12-23 07:38:51,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:38:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2020-12-23 07:38:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:38:51,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:51,415 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-23 07:38:51,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:38:51,631 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash -316772764, now seen corresponding path program 2 times [2020-12-23 07:38:51,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:51,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958756023] [2020-12-23 07:38:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:51,639 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:51,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518434327] [2020-12-23 07:38:51,640 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 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 07:38:51,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:38:51,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:38:51,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:52,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958756023] [2020-12-23 07:38:52,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:52,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518434327] [2020-12-23 07:38:52,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:52,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:38:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244334939] [2020-12-23 07:38:52,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:38:52,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:38:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:38:52,109 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand 13 states. [2020-12-23 07:38:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:53,023 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2020-12-23 07:38:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:38:53,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-23 07:38:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:53,026 INFO L225 Difference]: With dead ends: 272 [2020-12-23 07:38:53,026 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 07:38:53,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:38:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 07:38:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-23 07:38:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 07:38:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2020-12-23 07:38:53,056 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 49 [2020-12-23 07:38:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:53,057 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2020-12-23 07:38:53,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:38:53,057 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2020-12-23 07:38:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:38:53,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:53,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-23 07:38:53,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:38:53,272 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash -231890065, now seen corresponding path program 2 times [2020-12-23 07:38:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:53,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021056319] [2020-12-23 07:38:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:53,281 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:53,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937176876] [2020-12-23 07:38:53,281 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 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 07:38:53,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:38:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:38:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:38:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:38:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:38:53,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021056319] [2020-12-23 07:38:53,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:38:53,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937176876] [2020-12-23 07:38:53,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:38:53,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:38:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705871871] [2020-12-23 07:38:53,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:38:53,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:38:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:38:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:38:53,481 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand 9 states. [2020-12-23 07:38:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:38:53,600 INFO L93 Difference]: Finished difference Result 297 states and 361 transitions. [2020-12-23 07:38:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:38:53,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-12-23 07:38:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:38:53,603 INFO L225 Difference]: With dead ends: 297 [2020-12-23 07:38:53,603 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 07:38:53,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:38:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 07:38:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2020-12-23 07:38:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-23 07:38:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2020-12-23 07:38:53,642 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 52 [2020-12-23 07:38:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:38:53,642 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2020-12-23 07:38:53,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:38:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2020-12-23 07:38:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 07:38:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:38:53,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-12-23 07:38:53,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:38:53,859 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:38:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:38:53,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1401161001, now seen corresponding path program 3 times [2020-12-23 07:38:53,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:38:53,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595799881] [2020-12-23 07:38:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:38:53,868 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:38:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66750226] [2020-12-23 07:38:53,868 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 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