/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/divbin_unwindbound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:28:06,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:28:06,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:28:06,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:28:06,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:28:06,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:28:06,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:28:06,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:28:06,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:28:06,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:28:06,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:28:06,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:28:06,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:28:06,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:28:06,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:28:06,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:28:06,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:28:06,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:28:06,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:28:06,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:28:06,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:28:06,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:28:06,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:28:06,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:28:06,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:28:06,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:28:06,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:28:06,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:28:06,893 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 17:28:06,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:28:06,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:28:06,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:28:06,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:28:06,951 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:28:06,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:28:06,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:28:06,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:28:06,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:28:06,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:28:06,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:28:06,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:28:06,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:28:06,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:28:06,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:28:06,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:28:06,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:28:06,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:28:06,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:28:06,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:28:06,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:28:06,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:28:06,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:28:06,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:28:06,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:28:06,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:28:07,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:28:07,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:28:07,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:28:07,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:28:07,414 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:28:07,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound1.i [2021-01-06 17:28:07,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04bf08b69/a358e4635a094f499ea9dcc05776e96f/FLAG41b24dc3a [2021-01-06 17:28:08,202 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:28:08,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound1.i [2021-01-06 17:28:08,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04bf08b69/a358e4635a094f499ea9dcc05776e96f/FLAG41b24dc3a [2021-01-06 17:28:08,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04bf08b69/a358e4635a094f499ea9dcc05776e96f [2021-01-06 17:28:08,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:28:08,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:28:08,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:08,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:28:08,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:28:08,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5676d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08, skipping insertion in model container [2021-01-06 17:28:08,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:28:08,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:28:08,783 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/divbin_unwindbound1.i[950,963] 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[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:08,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:08,822 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:28:08,839 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/divbin_unwindbound1.i[950,963] 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[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:28:08,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:28:08,865 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:28:08,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08 WrapperNode [2021-01-06 17:28:08,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:28:08,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:08,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:28:08,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:28:08,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:28:08,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:28:08,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:28:08,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:28:08,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (1/1) ... [2021-01-06 17:28:08,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:28:08,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:28:08,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:28:08,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:28:08,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (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 17:28:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:28:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:28:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:28:09,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:28:09,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:28:09,401 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 17:28:09,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:09 BoogieIcfgContainer [2021-01-06 17:28:09,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:28:09,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:28:09,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:28:09,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:28:09,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:28:08" (1/3) ... [2021-01-06 17:28:09,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e53d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:09, skipping insertion in model container [2021-01-06 17:28:09,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:28:08" (2/3) ... [2021-01-06 17:28:09,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251e53d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:28:09, skipping insertion in model container [2021-01-06 17:28:09,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:09" (3/3) ... [2021-01-06 17:28:09,413 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound1.i [2021-01-06 17:28:09,420 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:28:09,425 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:28:09,448 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:28:09,482 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:28:09,482 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:28:09,482 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:28:09,482 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:28:09,483 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:28:09,483 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:28:09,483 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:28:09,483 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:28:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 17:28:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:28:09,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:09,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:09,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-01-06 17:28:09,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891810273] [2021-01-06 17:28:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:09,726 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 17:28:09,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891810273] [2021-01-06 17:28:09,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:09,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:28:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409328800] [2021-01-06 17:28:09,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:28:09,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:28:09,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:28:09,764 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 17:28:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:09,788 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-01-06 17:28:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:28:09,790 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:28:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:09,820 INFO L225 Difference]: With dead ends: 45 [2021-01-06 17:28:09,820 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:28:09,824 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 17:28:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:28:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:28:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:28:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-01-06 17:28:09,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-01-06 17:28:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:09,869 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-01-06 17:28:09,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:28:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-01-06 17:28:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:28:09,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:09,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:09,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:28:09,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-01-06 17:28:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031684771] [2021-01-06 17:28:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:09,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:09,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973729801] [2021-01-06 17:28:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:28:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:10,243 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 17:28:10,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031684771] [2021-01-06 17:28:10,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:10,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973729801] [2021-01-06 17:28:10,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:10,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:28:10,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874507785] [2021-01-06 17:28:10,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:28:10,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:10,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:28:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:28:10,254 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2021-01-06 17:28:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:10,298 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-01-06 17:28:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:28:10,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 17:28:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:10,302 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:28:10,302 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:28:10,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 17:28:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:28:10,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 17:28:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:28:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-01-06 17:28:10,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-01-06 17:28:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:10,313 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-01-06 17:28:10,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:28:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-01-06 17:28:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:28:10,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:10,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:10,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:28:10,529 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-01-06 17:28:10,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:10,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375768204] [2021-01-06 17:28:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:10,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:10,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617489912] [2021-01-06 17:28:10,563 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 17:28:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:28:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:10,707 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 17:28:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375768204] [2021-01-06 17:28:10,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617489912] [2021-01-06 17:28:10,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:10,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:28:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233408569] [2021-01-06 17:28:10,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:28:10,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:28:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:28:10,711 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2021-01-06 17:28:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:10,758 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-01-06 17:28:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:28:10,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 17:28:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:10,760 INFO L225 Difference]: With dead ends: 28 [2021-01-06 17:28:10,760 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:28:10,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:28:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:28:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:28:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:28:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:28:10,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-01-06 17:28:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:10,765 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:28:10,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:28:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:28:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:28:10,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:10,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:10,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:10,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1637141202, now seen corresponding path program 1 times [2021-01-06 17:28:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:10,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231946776] [2021-01-06 17:28:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:10,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:10,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057600049] [2021-01-06 17:28:10,998 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 17:28:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:28:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:11,341 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 17:28:11,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231946776] [2021-01-06 17:28:11,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:11,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057600049] [2021-01-06 17:28:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:28:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:28:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301590256] [2021-01-06 17:28:11,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:28:11,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:28:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:28:11,348 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2021-01-06 17:28:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:11,630 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-01-06 17:28:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:28:11,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 17:28:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:11,632 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:28:11,632 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:28:11,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:28:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:28:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 17:28:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:28:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 17:28:11,637 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-01-06 17:28:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:11,638 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 17:28:11,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:28:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 17:28:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:28:11,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:28:11,639 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:28:11,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:11,855 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:28:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:28:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2102327309, now seen corresponding path program 1 times [2021-01-06 17:28:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:28:11,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733835349] [2021-01-06 17:28:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:28:11,874 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:28:11,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441691256] [2021-01-06 17:28:11,875 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 17:28:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:28:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:28:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:28:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:28:12,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733835349] [2021-01-06 17:28:12,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:28:12,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441691256] [2021-01-06 17:28:12,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:28:12,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:28:12,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271398040] [2021-01-06 17:28:12,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:28:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:28:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:28:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:28:12,248 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2021-01-06 17:28:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:28:12,683 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-01-06 17:28:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:28:12,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 17:28:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:28:12,684 INFO L225 Difference]: With dead ends: 18 [2021-01-06 17:28:12,684 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:28:12,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:28:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:28:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:28:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:28:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:28:12,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-01-06 17:28:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:28:12,687 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:28:12,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:28:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:28:12,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:28:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:28:12,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:28:12,996 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-01-06 17:28:12,997 INFO L189 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-01-06 17:28:12,998 INFO L185 CegarLoopUtils]: At program point L19-2(line 42) the Hoare annotation is: false [2021-01-06 17:28:13,001 INFO L189 CegarLoopUtils]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-01-06 17:28:13,001 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-01-06 17:28:13,001 INFO L189 CegarLoopUtils]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2021-01-06 17:28:13,001 INFO L192 CegarLoopUtils]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-01-06 17:28:13,002 INFO L189 CegarLoopUtils]: For program point L40(lines 40 49) no Hoare annotation was computed. [2021-01-06 17:28:13,002 INFO L189 CegarLoopUtils]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2021-01-06 17:28:13,002 INFO L189 CegarLoopUtils]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2021-01-06 17:28:13,002 INFO L185 CegarLoopUtils]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse6 (mod ULTIMATE.start_main_~B~0 4294967296))) (let ((.cse0 (<= 1 .cse6)) (.cse1 (< .cse6 2147483647)) (.cse2 (= ULTIMATE.start_main_~q~0 0)) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0))) (or (and (<= 1 ~counter~0) .cse0 (< (div (+ (mod ULTIMATE.start_main_~r~0 4294967296) (- 1)) (- 4294967296)) 1) .cse1 .cse2 .cse3 .cse4) (let ((.cse5 (mod ULTIMATE.start_main_~b~0 4294967296))) (and (<= 1 .cse5) .cse0 (<= ~counter~0 0) .cse1 .cse2 (< .cse5 2147483647) .cse3 .cse4 (<= 0 ~counter~0)))))) [2021-01-06 17:28:13,002 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 17:28:13,002 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 17:28:13,003 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 17:28:13,003 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-01-06 17:28:13,004 INFO L189 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-01-06 17:28:13,004 INFO L189 CegarLoopUtils]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-01-06 17:28:13,004 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L189 CegarLoopUtils]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L189 CegarLoopUtils]: For program point L45(lines 45 48) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L189 CegarLoopUtils]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L189 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 17:28:13,005 INFO L192 CegarLoopUtils]: At program point L51(lines 26 52) the Hoare annotation is: true [2021-01-06 17:28:13,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:28:13 BoogieIcfgContainer [2021-01-06 17:28:13,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:28:13,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:28:13,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:28:13,036 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:28:13,037 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:28:09" (3/4) ... [2021-01-06 17:28:13,040 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 17:28:13,050 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-01-06 17:28:13,051 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 17:28:13,051 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:28:13,052 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:28:13,103 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/divbin_unwindbound1.i-witness.graphml [2021-01-06 17:28:13,104 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:28:13,106 INFO L168 Benchmark]: Toolchain (without parser) took 4523.13 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 52.8 MB in the end (delta: 73.1 MB). Peak memory consumption was 74.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,106 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:28:13,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,108 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.13 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,109 INFO L168 Benchmark]: Boogie Preprocessor took 26.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,109 INFO L168 Benchmark]: RCFGBuilder took 463.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 132.2 MB in the end (delta: -19.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,110 INFO L168 Benchmark]: TraceAbstraction took 3630.30 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 55.9 MB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,111 INFO L168 Benchmark]: Witness Printer took 68.04 ms. Allocated memory is still 151.0 MB. Free memory was 55.9 MB in the beginning and 52.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:28:13,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 115.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.13 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.83 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 463.73 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 132.2 MB in the end (delta: -19.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3630.30 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 55.9 MB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 8.0 GB. * Witness Printer took 68.04 ms. Allocated memory is still 151.0 MB. Free memory was 55.9 MB in the beginning and 52.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((1 <= counter && 1 <= B % 4294967296) && (r % 4294967296 + -1) / -4294967296 < 1) && B % 4294967296 < 2147483647) && q == 0) && cond == 1) && A == r) || ((((((((1 <= b % 4294967296 && 1 <= B % 4294967296) && counter <= 0) && B % 4294967296 < 2147483647) && q == 0) && b % 4294967296 < 2147483647) && cond == 1) && A == r) && 0 <= counter) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 74 SDslu, 109 SDs, 0 SdLazy, 85 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 8 NumberOfFragments, 72 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 5415 SizeOfPredicates, 19 NumberOfNonLiveVariables, 266 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 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 correct! Received shutdown request...