/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_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:34:17,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:34:17,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:34:17,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:34:17,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:34:17,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:34:17,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:34:17,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:34:17,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:34:17,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:34:17,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:34:17,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:34:17,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:34:17,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:34:17,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:34:17,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:34:17,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:34:17,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:34:17,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:34:17,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:34:17,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:34:17,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:34:17,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:34:17,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:34:17,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:34:17,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:34:17,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:34:17,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:34:17,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:34:17,870 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:34:17,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:34:17,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:34:17,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:34:17,873 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:34:17,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:34:17,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:34:17,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:34:17,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:34:17,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:34:17,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:34:17,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:34:17,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:34:17,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:34:17,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:34:17,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:34:17,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:34:17,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:17,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:34:17,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:34:17,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:34:17,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:34:17,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:34:17,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:34:17,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:34:17,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:34:18,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:34:18,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:34:18,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:34:18,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:34:18,414 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:34:18,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-23 07:34:18,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7761e402f/1cf640a2904d465896b2e268fabc3d27/FLAG48910bef1 [2020-12-23 07:34:19,178 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:34:19,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2020-12-23 07:34:19,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7761e402f/1cf640a2904d465896b2e268fabc3d27/FLAG48910bef1 [2020-12-23 07:34:19,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7761e402f/1cf640a2904d465896b2e268fabc3d27 [2020-12-23 07:34:19,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:34:19,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:34:19,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:19,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:34:19,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:34:19,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aadec5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19, skipping insertion in model container [2020-12-23 07:34:19,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:34:19,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:34:19,813 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_unwindbound5.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,] [2020-12-23 07:34:19,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:19,866 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:34:19,893 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_unwindbound5.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,] [2020-12-23 07:34:19,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:19,944 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:34:19,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19 WrapperNode [2020-12-23 07:34:19,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:19,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:19,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:34:19,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:34:19,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:19,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:34:19,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:34:19,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:34:19,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:19,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:20,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:20,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:20,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... [2020-12-23 07:34:20,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:34:20,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:34:20,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:34:20,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:34:20,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:20,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:34:20,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:34:20,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:34:20,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:34:20,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:34:20,373 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 07:34:20,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:20 BoogieIcfgContainer [2020-12-23 07:34:20,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:34:20,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:34:20,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:34:20,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:34:20,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:34:19" (1/3) ... [2020-12-23 07:34:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b50b96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:20, skipping insertion in model container [2020-12-23 07:34:20,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:19" (2/3) ... [2020-12-23 07:34:20,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b50b96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:20, skipping insertion in model container [2020-12-23 07:34:20,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:20" (3/3) ... [2020-12-23 07:34:20,403 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2020-12-23 07:34:20,420 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:34:20,432 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:34:20,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:34:20,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:34:20,528 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:34:20,529 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:34:20,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:34:20,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:34:20,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:34:20,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:34:20,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:34:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 07:34:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:34:20,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:20,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:20,551 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2020-12-23 07:34:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:20,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066123427] [2020-12-23 07:34:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066123427] [2020-12-23 07:34:20,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:20,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:34:20,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287445683] [2020-12-23 07:34:20,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:34:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:34:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:20,787 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 07:34:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:20,803 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-12-23 07:34:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:34:20,805 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 07:34:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:20,813 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:34:20,813 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:34:20,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:34:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 07:34:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:34:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 07:34:20,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-23 07:34:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:20,851 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 07:34:20,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:34:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 07:34:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:34:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:20,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:20,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:34:20,853 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2020-12-23 07:34:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:20,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622312802] [2020-12-23 07:34:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:20,896 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334413742] [2020-12-23 07:34:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:34:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:21,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622312802] [2020-12-23 07:34:21,098 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:21,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334413742] [2020-12-23 07:34:21,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:21,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:21,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150393669] [2020-12-23 07:34:21,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:34:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:21,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:34:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:34:21,102 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-12-23 07:34:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:21,126 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:34:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:34:21,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 07:34:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:21,128 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:34:21,128 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:34:21,130 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 [2020-12-23 07:34:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:34:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:34:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:34:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 07:34:21,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-12-23 07:34:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:21,135 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 07:34:21,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:34:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 07:34:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:34:21,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:21,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:21,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:34:21,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2020-12-23 07:34:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:21,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414711962] [2020-12-23 07:34:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:21,388 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:21,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206711000] [2020-12-23 07:34:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414711962] [2020-12-23 07:34:21,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:21,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206711000] [2020-12-23 07:34:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:21,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:34:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918878589] [2020-12-23 07:34:21,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:21,667 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-23 07:34:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:21,973 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-23 07:34:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:34:21,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 07:34:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:21,976 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:34:21,976 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:34:21,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:34:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:34:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 07:34:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:34:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 07:34:21,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-23 07:34:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:21,984 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 07:34:21,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 07:34:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:34:21,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:21,985 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:22,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,200 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:22,202 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2020-12-23 07:34:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:22,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446133229] [2020-12-23 07:34:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:22,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:22,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871308316] [2020-12-23 07:34:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446133229] [2020-12-23 07:34:22,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871308316] [2020-12-23 07:34:22,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:22,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:34:22,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310132270] [2020-12-23 07:34:22,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:34:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:34:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:34:22,352 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-23 07:34:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:22,399 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 07:34:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:34:22,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:34:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:22,400 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:34:22,401 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:34:22,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:34:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 07:34:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:22,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-23 07:34:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:22,431 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:22,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:34:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:34:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:22,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:22,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,648 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:22,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2020-12-23 07:34:22,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:22,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725864742] [2020-12-23 07:34:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:22,668 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843334209] [2020-12-23 07:34:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:22,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:34:22,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:23,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725864742] [2020-12-23 07:34:23,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:23,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843334209] [2020-12-23 07:34:23,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:23,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:34:23,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262898996] [2020-12-23 07:34:23,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:34:23,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:34:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:23,153 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 10 states. [2020-12-23 07:34:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:24,020 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 07:34:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:34:24,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-23 07:34:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:24,023 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:34:24,023 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:34:24,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:34:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:34:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-23 07:34:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:24,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2020-12-23 07:34:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:24,032 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:24,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:34:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:34:24,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:24,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:24,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:24,237 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2020-12-23 07:34:24,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:24,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144591869] [2020-12-23 07:34:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:24,258 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:24,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499988242] [2020-12-23 07:34:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:24,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144591869] [2020-12-23 07:34:24,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:24,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499988242] [2020-12-23 07:34:24,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:24,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:24,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691507239] [2020-12-23 07:34:24,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:34:24,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:34:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:24,357 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-23 07:34:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:24,388 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-23 07:34:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:34:24,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 07:34:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:24,389 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:34:24,390 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:34:24,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:34:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:34:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 07:34:24,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-12-23 07:34:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:24,395 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 07:34:24,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:34:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 07:34:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:24,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:24,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:24,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:34:24,611 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:24,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2020-12-23 07:34:24,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:24,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167777840] [2020-12-23 07:34:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:24,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:24,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825865465] [2020-12-23 07:34:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:34:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:34:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167777840] [2020-12-23 07:34:24,848 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:24,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825865465] [2020-12-23 07:34:24,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:24,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:34:24,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977425453] [2020-12-23 07:34:24,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:24,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:24,851 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-12-23 07:34:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:24,976 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-23 07:34:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:34:24,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 07:34:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:24,978 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:34:24,978 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:34:24,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:34:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-23 07:34:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:34:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 07:34:24,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-12-23 07:34:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:24,984 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 07:34:24,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 07:34:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:34:24,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:24,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:25,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:25,189 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2020-12-23 07:34:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:25,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506932921] [2020-12-23 07:34:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:25,218 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:25,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076313519] [2020-12-23 07:34:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:25,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:34:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:25,846 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:25,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506932921] [2020-12-23 07:34:25,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:25,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076313519] [2020-12-23 07:34:25,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:25,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:34:25,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919061968] [2020-12-23 07:34:25,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:25,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:25,930 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-12-23 07:34:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:26,218 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-12-23 07:34:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:26,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 07:34:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:26,222 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:34:26,222 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:34:26,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:34:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:34:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:34:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:34:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-12-23 07:34:26,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2020-12-23 07:34:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:26,228 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-12-23 07:34:26,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-12-23 07:34:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:34:26,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:26,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:26,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:26,435 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash 346519601, now seen corresponding path program 1 times [2020-12-23 07:34:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:26,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332098756] [2020-12-23 07:34:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:26,463 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:26,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112848332] [2020-12-23 07:34:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:34:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:34:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332098756] [2020-12-23 07:34:26,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:26,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112848332] [2020-12-23 07:34:26,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:26,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:34:26,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290739255] [2020-12-23 07:34:26,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:26,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:26,587 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2020-12-23 07:34:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:26,626 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 07:34:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:26,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-23 07:34:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:26,628 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:34:26,628 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:34:26,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:34:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:34:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:34:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 07:34:26,648 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-12-23 07:34:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:26,650 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 07:34:26,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 07:34:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:34:26,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:26,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:26,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:34:26,866 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2020-12-23 07:34:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442780879] [2020-12-23 07:34:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:26,887 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:26,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448590087] [2020-12-23 07:34:26,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:27,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:34:27,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:34:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:27,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442780879] [2020-12-23 07:34:27,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448590087] [2020-12-23 07:34:27,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:27,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:34:27,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425506836] [2020-12-23 07:34:27,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:27,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:27,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:27,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:27,682 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-23 07:34:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:27,725 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-12-23 07:34:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:27,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 07:34:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:27,726 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:34:27,727 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:34:27,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:27,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:34:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 07:34:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:34:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 07:34:27,731 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-23 07:34:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:27,731 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 07:34:27,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 07:34:27,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:34:27,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:27,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:27,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:27,938 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2031166962, now seen corresponding path program 1 times [2020-12-23 07:34:27,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:27,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865030211] [2020-12-23 07:34:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:27,952 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:27,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194871203] [2020-12-23 07:34:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:34:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:33,814 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-23 07:34:34,599 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-23 07:34:35,278 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:36,460 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:37,531 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:38,837 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:38,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865030211] [2020-12-23 07:34:38,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194871203] [2020-12-23 07:34:38,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:34:38,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:38,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:34:38,884 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:34:38,884 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:34:39,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:39,108 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:34:39,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:34:39 BoogieIcfgContainer [2020-12-23 07:34:39,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:34:39,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:34:39,109 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:34:39,109 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:34:39,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:20" (3/4) ... [2020-12-23 07:34:39,113 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:34:39,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:34:39,115 INFO L168 Benchmark]: Toolchain (without parser) took 19571.65 ms. Allocated memory was 163.6 MB in the beginning and 317.7 MB in the end (delta: 154.1 MB). Free memory was 138.4 MB in the beginning and 126.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 167.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,115 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 135.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:34:39,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.12 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 128.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.38 ms. Allocated memory is still 163.6 MB. Free memory was 128.1 MB in the beginning and 126.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,117 INFO L168 Benchmark]: Boogie Preprocessor took 25.62 ms. Allocated memory is still 163.6 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,117 INFO L168 Benchmark]: RCFGBuilder took 366.13 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 111.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,118 INFO L168 Benchmark]: TraceAbstraction took 18727.33 ms. Allocated memory was 163.6 MB in the beginning and 317.7 MB in the end (delta: 154.1 MB). Free memory was 111.3 MB in the beginning and 126.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 145.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:34:39,119 INFO L168 Benchmark]: Witness Printer took 4.29 ms. Allocated memory is still 317.7 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:34:39,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 135.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 399.12 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 128.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.38 ms. Allocated memory is still 163.6 MB. Free memory was 128.1 MB in the beginning and 126.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.62 ms. Allocated memory is still 163.6 MB. Free memory was 126.6 MB in the beginning and 125.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.13 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 111.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18727.33 ms. Allocated memory was 163.6 MB in the beginning and 317.7 MB in the end (delta: 154.1 MB). Free memory was 111.3 MB in the beginning and 126.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 145.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.29 ms. Allocated memory is still 317.7 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND FALSE !(!(r >= b)) [L38] b = 2 * b [L36] EXPR counter++ [L36] COND TRUE counter++<5 [L37] COND TRUE !(r >= b) [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND TRUE counter++<5 [L19] COND FALSE !(!(cond)) [L42] COND FALSE !(!(b != B)) [L43] q = 2 * q [L44] b = b / 2 [L45] COND TRUE r >= b [L46] q = q + 1 [L47] r = r - b [L40] EXPR counter++ [L40] COND FALSE !(counter++<5) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 18.5s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 219 SDtfs, 388 SDslu, 380 SDs, 0 SdLazy, 330 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 19755 SizeOfPredicates, 39 NumberOfNonLiveVariables, 806 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 42/66 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...