/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:33:21,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:33:21,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:33:21,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:33:21,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:33:21,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:33:21,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:33:21,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:33:21,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:33:21,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:33:21,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:33:21,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:33:21,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:33:21,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:33:21,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:33:21,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:33:21,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:33:21,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:33:21,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:33:21,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:33:21,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:33:21,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:33:21,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:33:21,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:33:21,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:33:21,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:33:21,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:33:21,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:33:21,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:33:21,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:33:21,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:33:21,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:33:21,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:33:21,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:33:21,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:33:21,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:33:21,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:33:21,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:33:21,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:33:21,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:33:21,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:33:21,472 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:33:21,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:33:21,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:33:21,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:33:21,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:33:21,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:33:21,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:33:21,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:33:21,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:33:21,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:33:21,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:33:21,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:33:21,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:33:21,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:33:21,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:33:21,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:33:21,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:33:21,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:33:21,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:33:21,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:33:21,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:33:21,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:33:21,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:33:21,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:33:21,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:33:21,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:33:21,936 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:33:21,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-01-06 17:33:22,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e8e3f836/e4251cf399474a259b8fd874a258c30e/FLAGc39d11600 [2021-01-06 17:33:22,625 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:33:22,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2021-01-06 17:33:22,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e8e3f836/e4251cf399474a259b8fd874a258c30e/FLAGc39d11600 [2021-01-06 17:33:23,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e8e3f836/e4251cf399474a259b8fd874a258c30e [2021-01-06 17:33:23,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:33:23,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:33:23,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:23,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:33:23,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:33:23,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bc8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23, skipping insertion in model container [2021-01-06 17:33:23,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:33:23,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:33:23,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:23,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:23,336 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:33:23,351 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:23,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:23,379 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:33:23,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23 WrapperNode [2021-01-06 17:33:23,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:23,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:23,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:33:23,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:33:23,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:23,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:33:23,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:33:23,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:33:23,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... [2021-01-06 17:33:23,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:33:23,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:33:23,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:33:23,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:33:23,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:33:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:33:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:33:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:33:23,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:33:24,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:33:24,136 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-01-06 17:33:24,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:24 BoogieIcfgContainer [2021-01-06 17:33:24,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:33:24,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:33:24,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:33:24,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:33:24,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:33:23" (1/3) ... [2021-01-06 17:33:24,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5941c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:24, skipping insertion in model container [2021-01-06 17:33:24,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:23" (2/3) ... [2021-01-06 17:33:24,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5941c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:24, skipping insertion in model container [2021-01-06 17:33:24,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:24" (3/3) ... [2021-01-06 17:33:24,154 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2021-01-06 17:33:24,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:33:24,170 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 17:33:24,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 17:33:24,235 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:33:24,235 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:33:24,236 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:33:24,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:33:24,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:33:24,237 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:33:24,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:33:24,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:33:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-01-06 17:33:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:33:24,262 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:24,263 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-01-06 17:33:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418601733] [2021-01-06 17:33:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:24,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418601733] [2021-01-06 17:33:24,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:24,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:33:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124357347] [2021-01-06 17:33:24,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:33:24,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:33:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:33:24,547 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2021-01-06 17:33:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:24,571 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-01-06 17:33:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:33:24,573 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 17:33:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:24,583 INFO L225 Difference]: With dead ends: 77 [2021-01-06 17:33:24,583 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:33:24,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:33:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:33:24,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:33:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:33:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 17:33:24,629 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-01-06 17:33:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:24,630 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 17:33:24,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:33:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 17:33:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:33:24,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:24,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:33:24,632 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-01-06 17:33:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:24,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449330299] [2021-01-06 17:33:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:24,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:24,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992040501] [2021-01-06 17:33:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:33:24,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449330299] [2021-01-06 17:33:24,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992040501] [2021-01-06 17:33:24,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:33:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196073218] [2021-01-06 17:33:24,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:33:24,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:33:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:33:24,844 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2021-01-06 17:33:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:24,875 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:33:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:33:24,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:33:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:24,877 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:33:24,877 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:33:24,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:33:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:33:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:33:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:33:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 17:33:24,886 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-01-06 17:33:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 17:33:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:33:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 17:33:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:33:24,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:25,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:33:25,101 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-01-06 17:33:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:25,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938517620] [2021-01-06 17:33:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:25,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:25,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102622576] [2021-01-06 17:33:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:25,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:25,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:25,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938517620] [2021-01-06 17:33:25,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:25,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102622576] [2021-01-06 17:33:25,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:25,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:25,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765624975] [2021-01-06 17:33:25,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:25,266 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2021-01-06 17:33:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:25,414 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-01-06 17:33:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:25,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:33:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:25,416 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:33:25,416 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:33:25,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:33:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-01-06 17:33:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:33:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-01-06 17:33:25,426 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-01-06 17:33:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:25,426 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-01-06 17:33:25,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-01-06 17:33:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:33:25,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:25,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:25,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:25,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-01-06 17:33:25,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:25,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628432480] [2021-01-06 17:33:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:25,664 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:25,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041450092] [2021-01-06 17:33:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:25,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:25,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628432480] [2021-01-06 17:33:25,994 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:25,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041450092] [2021-01-06 17:33:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126558938] [2021-01-06 17:33:25,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:25,997 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 6 states. [2021-01-06 17:33:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:26,049 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-01-06 17:33:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:26,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-01-06 17:33:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:26,051 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:33:26,051 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:33:26,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:33:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 17:33:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:33:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 17:33:26,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-01-06 17:33:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:26,057 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 17:33:26,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 17:33:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:33:26,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:26,058 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:26,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,273 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:26,275 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-01-06 17:33:26,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:26,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278228360] [2021-01-06 17:33:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:26,293 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:26,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839621603] [2021-01-06 17:33:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:26,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278228360] [2021-01-06 17:33:26,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:26,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839621603] [2021-01-06 17:33:26,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:33:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232204282] [2021-01-06 17:33:26,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:26,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:26,458 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2021-01-06 17:33:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:26,492 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-01-06 17:33:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:26,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 17:33:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:26,494 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:33:26,494 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:33:26,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:33:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:33:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:33:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 17:33:26,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-01-06 17:33:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:26,500 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 17:33:26,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 17:33:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:26,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:26,501 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:26,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,712 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-01-06 17:33:26,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:26,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746302129] [2021-01-06 17:33:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:26,729 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:26,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844570692] [2021-01-06 17:33:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:33:26,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:33:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:33:26,839 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:33:26,903 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:33:26,903 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:33:27,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:33:27,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:33:27 BoogieIcfgContainer [2021-01-06 17:33:27,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:33:27,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:33:27,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:33:27,170 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:33:27,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:24" (3/4) ... [2021-01-06 17:33:27,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 17:33:27,231 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c-witness.graphml [2021-01-06 17:33:27,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:33:27,234 INFO L168 Benchmark]: Toolchain (without parser) took 4212.64 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 107.2 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,235 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 135.0 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:33:27,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.20 ms. Allocated memory is still 160.4 MB. Free memory was 135.3 MB in the beginning and 125.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.04 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 123.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,237 INFO L168 Benchmark]: Boogie Preprocessor took 29.35 ms. Allocated memory is still 160.4 MB. Free memory was 123.3 MB in the beginning and 122.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,238 INFO L168 Benchmark]: RCFGBuilder took 677.98 ms. Allocated memory is still 160.4 MB. Free memory was 121.9 MB in the beginning and 136.8 MB in the end (delta: -14.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,239 INFO L168 Benchmark]: TraceAbstraction took 3026.74 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 109.8 MB in the end (delta: 27.0 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,240 INFO L168 Benchmark]: Witness Printer took 62.05 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 107.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:33:27,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory was 135.1 MB in the beginning and 135.0 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 356.20 ms. Allocated memory is still 160.4 MB. Free memory was 135.3 MB in the beginning and 125.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.04 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 123.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.35 ms. Allocated memory is still 160.4 MB. Free memory was 123.3 MB in the beginning and 122.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 677.98 ms. Allocated memory is still 160.4 MB. Free memory was 121.9 MB in the beginning and 136.8 MB in the end (delta: -14.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3026.74 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 109.8 MB in the end (delta: 27.0 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB. * Witness Printer took 62.05 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 107.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND FALSE !(counter++<2) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 155 SDtfs, 180 SDslu, 175 SDs, 0 SdLazy, 68 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 1875 SizeOfPredicates, 6 NumberOfNonLiveVariables, 351 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...