/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/freire2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:38:37,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:38:37,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:38:37,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:38:37,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:38:37,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:38:37,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:38:37,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:38:37,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:38:37,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:38:37,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:38:37,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:38:37,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:38:37,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:38:37,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:38:37,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:38:37,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:38:37,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:38:37,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:38:37,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:38:37,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:38:37,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:38:37,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:38:37,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:38:37,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:38:37,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:38:37,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:38:37,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:38:37,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:38:37,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:38:37,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:38:37,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:38:37,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:38:37,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:38:37,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:38:37,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:38:37,443 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 17:38:37,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:38:37,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:38:37,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:38:37,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:38:37,497 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:38:37,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:38:37,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:38:37,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:38:37,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:38:37,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:38:37,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:38:37,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:38:37,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:38:37,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:38:37,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:38:37,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:38:37,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:38:37,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:38:37,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:38:37,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:38:37,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:38:37,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:38:37,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:38:37,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:38:37,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:38:37,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:38:37,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:38:37,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:38:37,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:38:37,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:38:37,919 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:38:37,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-01-06 17:38:38,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215d474af/6a7e18a9217d485bba3b4acb83e7fa2e/FLAG155ccfc37 [2021-01-06 17:38:38,683 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:38:38,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound20.c [2021-01-06 17:38:38,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215d474af/6a7e18a9217d485bba3b4acb83e7fa2e/FLAG155ccfc37 [2021-01-06 17:38:39,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/215d474af/6a7e18a9217d485bba3b4acb83e7fa2e [2021-01-06 17:38:39,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:38:39,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:38:39,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:38:39,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:38:39,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:38:39,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461b5ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39, skipping insertion in model container [2021-01-06 17:38:39,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:38:39,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:38:39,272 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/freire2_unwindbound20.c[709,722] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:38:39,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:38:39,339 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:38:39,355 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/freire2_unwindbound20.c[709,722] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:38:39,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:38:39,386 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:38:39,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39 WrapperNode [2021-01-06 17:38:39,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:38:39,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:38:39,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:38:39,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:38:39,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:38:39,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:38:39,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:38:39,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:38:39,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (1/1) ... [2021-01-06 17:38:39,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:38:39,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:38:39,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:38:39,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:38:39,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (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 17:38:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:38:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:38:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:38:39,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:38:39,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:38:39,869 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 17:38:39,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:38:39 BoogieIcfgContainer [2021-01-06 17:38:39,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:38:39,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:38:39,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:38:39,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:38:39,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:38:39" (1/3) ... [2021-01-06 17:38:39,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742410b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:38:39, skipping insertion in model container [2021-01-06 17:38:39,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:38:39" (2/3) ... [2021-01-06 17:38:39,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742410b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:38:39, skipping insertion in model container [2021-01-06 17:38:39,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:38:39" (3/3) ... [2021-01-06 17:38:39,881 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-01-06 17:38:39,934 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:38:39,944 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-01-06 17:38:39,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-01-06 17:38:40,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:38:40,023 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:38:40,023 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:38:40,023 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:38:40,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:38:40,024 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:38:40,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:38:40,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:38:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-01-06 17:38:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:38:40,047 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:38:40,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:38:40,048 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:38:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:38:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-01-06 17:38:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:38:40,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040988047] [2021-01-06 17:38:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:38:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:38:40,234 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 17:38:40,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040988047] [2021-01-06 17:38:40,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:38:40,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:38:40,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135205227] [2021-01-06 17:38:40,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:38:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:38:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:38:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:38:40,268 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-01-06 17:38:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:38:40,290 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-01-06 17:38:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:38:40,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:38:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:38:40,300 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:38:40,301 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:38:40,304 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 17:38:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:38:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:38:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:38:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:38:40,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-01-06 17:38:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:38:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:38:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:38:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:38:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:38:40,354 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:38:40,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:38:40,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:38:40,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:38:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:38:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-01-06 17:38:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:38:40,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769818373] [2021-01-06 17:38:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:38:40,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:38:40,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305240569] [2021-01-06 17:38:40,407 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 17:38:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:38:40,519 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:38:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:38:40,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:38:40,570 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:38:40,570 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:38:40,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:38:40,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:38:40 BoogieIcfgContainer [2021-01-06 17:38:40,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:38:40,823 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:38:40,823 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:38:40,823 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:38:40,824 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:38:39" (3/4) ... [2021-01-06 17:38:40,828 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:38:40,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:38:40,833 INFO L168 Benchmark]: Toolchain (without parser) took 1821.33 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 107.8 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:40,835 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.4 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:38:40,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:40,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:40,839 INFO L168 Benchmark]: Boogie Preprocessor took 30.02 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:40,841 INFO L168 Benchmark]: RCFGBuilder took 407.79 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 98.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:38:40,843 INFO L168 Benchmark]: TraceAbstraction took 948.97 ms. Allocated memory is still 151.0 MB. Free memory was 98.2 MB in the beginning and 108.4 MB in the end (delta: -10.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:38:40,845 INFO L168 Benchmark]: Witness Printer took 5.23 ms. Allocated memory is still 151.0 MB. Free memory was 108.4 MB in the beginning and 107.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:38:40,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.4 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 376.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.02 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.79 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 98.6 MB in the end (delta: 14.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 948.97 ms. Allocated memory is still 151.0 MB. Free memory was 98.2 MB in the beginning and 108.4 MB in the end (delta: -10.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.23 ms. Allocated memory is still 151.0 MB. Free memory was 108.4 MB in the beginning and 107.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<20 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 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=32occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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...