/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/lcm2_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:01:07,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:01:07,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:01:07,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:01:07,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:01:07,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:01:07,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:01:07,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:01:07,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:01:07,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:01:07,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:01:07,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:01:07,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:01:07,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:01:07,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:01:07,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:01:07,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:01:07,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:01:07,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:01:07,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:01:07,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:01:07,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:01:07,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:01:07,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:01:07,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:01:07,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:01:07,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:01:07,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:01:07,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:01:07,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:01:07,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:01:07,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:01:07,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:01:07,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:01:07,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:01:07,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:01:07,502 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 08:01:07,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:01:07,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:01:07,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:01:07,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:01:07,573 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:01:07,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:01:07,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:01:07,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:01:07,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:01:07,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:01:07,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:01:07,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:01:07,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:01:07,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:01:07,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:01:07,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:01:07,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:01:07,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:01:07,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:01:07,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:01:07,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:01:07,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:01:07,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:01:07,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:01:07,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:01:07,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:01:07,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:01:08,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:01:08,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:01:08,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:01:08,044 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:01:08,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound5.c [2020-12-23 08:01:08,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cfc177444/861e8fc022804413b51e703ef80e83c3/FLAG89dbc26d0 [2020-12-23 08:01:08,662 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:01:08,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound5.c [2020-12-23 08:01:08,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cfc177444/861e8fc022804413b51e703ef80e83c3/FLAG89dbc26d0 [2020-12-23 08:01:08,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cfc177444/861e8fc022804413b51e703ef80e83c3 [2020-12-23 08:01:08,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:01:09,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:01:09,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:09,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:01:09,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:01:09,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:08" (1/1) ... [2020-12-23 08:01:09,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1542cd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09, skipping insertion in model container [2020-12-23 08:01:09,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:01:08" (1/1) ... [2020-12-23 08:01:09,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:01:09,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:01:09,254 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/lcm2_unwindbound5.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] [2020-12-23 08:01:09,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:09,284 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:01:09,299 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/lcm2_unwindbound5.c[537,550] 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[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] [2020-12-23 08:01:09,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:01:09,323 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:01:09,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09 WrapperNode [2020-12-23 08:01:09,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:01:09,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:09,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:01:09,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:01:09,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:01:09,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:01:09,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:01:09,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:01:09,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (1/1) ... [2020-12-23 08:01:09,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:01:09,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:01:09,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:01:09,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:01:09,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (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 08:01:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:01:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:01:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:01:09,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:01:09,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:01:09,944 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 08:01:09,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:09 BoogieIcfgContainer [2020-12-23 08:01:09,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:01:09,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:01:09,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:01:09,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:01:09,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:01:08" (1/3) ... [2020-12-23 08:01:09,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5507f595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:09, skipping insertion in model container [2020-12-23 08:01:09,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:01:09" (2/3) ... [2020-12-23 08:01:09,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5507f595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:01:09, skipping insertion in model container [2020-12-23 08:01:09,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:09" (3/3) ... [2020-12-23 08:01:09,954 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound5.c [2020-12-23 08:01:09,961 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:01:09,966 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:01:09,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:01:10,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:01:10,013 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:01:10,013 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:01:10,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:01:10,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:01:10,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:01:10,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:01:10,013 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:01:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 08:01:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:01:10,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:10,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:10,037 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash -174643814, now seen corresponding path program 1 times [2020-12-23 08:01:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:10,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786728482] [2020-12-23 08:01:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:10,216 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 08:01:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786728482] [2020-12-23 08:01:10,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:10,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:01:10,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12539991] [2020-12-23 08:01:10,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:01:10,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:01:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:01:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:01:10,241 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-23 08:01:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:01:10,259 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-23 08:01:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:01:10,261 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 08:01:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:01:10,270 INFO L225 Difference]: With dead ends: 47 [2020-12-23 08:01:10,270 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 08:01:10,274 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 08:01:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 08:01:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 08:01:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 08:01:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 08:01:10,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2020-12-23 08:01:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:01:10,309 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 08:01:10,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:01:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 08:01:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:01:10,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:01:10,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:01:10,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:01:10,311 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:01:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:01:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1061593710, now seen corresponding path program 1 times [2020-12-23 08:01:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:01:10,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829799223] [2020-12-23 08:01:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:01:10,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:01:10,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125365549] [2020-12-23 08:01:10,343 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 08:01:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:01:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:01:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:01:10,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829799223] [2020-12-23 08:01:10,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:01:10,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125365549] [2020-12-23 08:01:10,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 08:01:10,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:01:10,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 08:01:10,724 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 08:01:10,724 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:01:10,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:01:10,964 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 08:01:10,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:01:10 BoogieIcfgContainer [2020-12-23 08:01:10,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:01:10,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:01:10,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:01:10,966 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:01:10,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:01:09" (3/4) ... [2020-12-23 08:01:10,970 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 08:01:10,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:01:10,972 INFO L168 Benchmark]: Toolchain (without parser) took 1969.25 ms. Allocated memory is still 155.2 MB. Free memory was 112.7 MB in the beginning and 85.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,973 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory was 129.0 MB in the beginning and 128.9 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:01:10,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.96 ms. Allocated memory is still 155.2 MB. Free memory was 138.8 MB in the beginning and 128.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,975 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.11 ms. Allocated memory is still 155.2 MB. Free memory was 128.6 MB in the beginning and 127.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,976 INFO L168 Benchmark]: Boogie Preprocessor took 53.89 ms. Allocated memory is still 155.2 MB. Free memory was 127.1 MB in the beginning and 138.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,977 INFO L168 Benchmark]: RCFGBuilder took 518.65 ms. Allocated memory is still 155.2 MB. Free memory was 138.6 MB in the beginning and 123.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,978 INFO L168 Benchmark]: TraceAbstraction took 1017.67 ms. Allocated memory is still 155.2 MB. Free memory was 122.9 MB in the beginning and 85.4 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. [2020-12-23 08:01:10,978 INFO L168 Benchmark]: Witness Printer took 4.91 ms. Allocated memory is still 155.2 MB. Free memory was 85.4 MB in the beginning and 85.1 MB in the end (delta: 322.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:01:10,983 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 155.2 MB. Free memory was 129.0 MB in the beginning and 128.9 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.96 ms. Allocated memory is still 155.2 MB. Free memory was 138.8 MB in the beginning and 128.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.11 ms. Allocated memory is still 155.2 MB. Free memory was 128.6 MB in the beginning and 127.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.89 ms. Allocated memory is still 155.2 MB. Free memory was 127.1 MB in the beginning and 138.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 518.65 ms. Allocated memory is still 155.2 MB. Free memory was 138.6 MB in the beginning and 123.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1017.67 ms. Allocated memory is still 155.2 MB. Free memory was 122.9 MB in the beginning and 85.4 MB in the end (delta: 37.5 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. * Witness Printer took 4.91 ms. Allocated memory is still 155.2 MB. Free memory was 85.4 MB in the beginning and 85.1 MB in the end (delta: 322.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_uint() [L24] b = __VERIFIER_nondet_uint() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...