/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/divbin2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:12:05,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:12:05,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:12:05,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:12:05,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:12:05,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:12:05,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:12:05,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:12:05,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:12:05,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:12:05,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:12:05,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:12:05,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:12:05,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:12:05,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:12:05,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:12:05,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:12:05,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:12:05,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:12:05,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:12:05,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:12:05,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:12:05,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:12:05,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:12:05,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:12:05,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:12:05,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:12:05,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:12:05,215 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 17:12:05,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:12:05,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:12:05,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:12:05,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:12:05,270 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:12:05,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:12:05,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:12:05,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:12:05,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:12:05,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:12:05,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:12:05,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:12:05,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:12:05,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:12:05,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:12:05,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:12:05,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:12:05,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:12:05,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:12:05,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:12:05,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:12:05,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:12:05,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:12:05,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:12:05,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:12:05,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:12:05,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:12:05,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:12:05,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:12:05,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:12:05,689 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:12:05,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/divbin2.i [2021-01-06 17:12:05,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb02bb670/d257cfb8ca5240d28476302a1b072686/FLAGf2a09cede [2021-01-06 17:12:06,454 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:12:06,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin2.i [2021-01-06 17:12:06,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb02bb670/d257cfb8ca5240d28476302a1b072686/FLAGf2a09cede [2021-01-06 17:12:06,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb02bb670/d257cfb8ca5240d28476302a1b072686 [2021-01-06 17:12:06,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:12:06,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:12:06,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:12:06,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:12:06,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:12:06,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:12:06" (1/1) ... [2021-01-06 17:12:06,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0bdc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:06, skipping insertion in model container [2021-01-06 17:12:06,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:12:06" (1/1) ... [2021-01-06 17:12:06,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:12:06,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:12:07,006 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/divbin2.i[951,964] 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 17:12:07,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:12:07,033 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:12:07,048 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/divbin2.i[951,964] 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 17:12:07,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:12:07,071 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:12:07,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07 WrapperNode [2021-01-06 17:12:07,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:12:07,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:12:07,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:12:07,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:12:07,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:12:07,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:12:07,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:12:07,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:12:07,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (1/1) ... [2021-01-06 17:12:07,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:12:07,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:12:07,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:12:07,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:12:07,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (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 17:12:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:12:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:12:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:12:07,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:12:07,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:12:07,483 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:12:07,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:12:07 BoogieIcfgContainer [2021-01-06 17:12:07,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:12:07,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:12:07,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:12:07,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:12:07,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:12:06" (1/3) ... [2021-01-06 17:12:07,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705ff69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:12:07, skipping insertion in model container [2021-01-06 17:12:07,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:12:07" (2/3) ... [2021-01-06 17:12:07,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705ff69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:12:07, skipping insertion in model container [2021-01-06 17:12:07,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:12:07" (3/3) ... [2021-01-06 17:12:07,495 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2.i [2021-01-06 17:12:07,502 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:12:07,514 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:12:07,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:12:07,629 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:12:07,630 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:12:07,630 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:12:07,630 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:12:07,630 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:12:07,630 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:12:07,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:12:07,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:12:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 17:12:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:12:07,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:07,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:12:07,683 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 889913870, now seen corresponding path program 1 times [2021-01-06 17:12:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:07,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204896456] [2021-01-06 17:12:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:07,944 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 17:12:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204896456] [2021-01-06 17:12:07,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:12:07,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:12:07,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255608562] [2021-01-06 17:12:07,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:12:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:12:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:12:07,983 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 17:12:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:08,006 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2021-01-06 17:12:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:12:08,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:12:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:08,019 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:12:08,020 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 17:12:08,023 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 17:12:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 17:12:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 17:12:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 17:12:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 17:12:08,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-01-06 17:12:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:08,061 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 17:12:08,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:12:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 17:12:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:12:08,062 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:08,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:08,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:12:08,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1810671351, now seen corresponding path program 1 times [2021-01-06 17:12:08,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:08,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848257973] [2021-01-06 17:12:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:08,081 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:08,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010839993] [2021-01-06 17:12:08,082 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 17:12:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:12:08,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:08,306 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 17:12:08,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848257973] [2021-01-06 17:12:08,307 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:08,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010839993] [2021-01-06 17:12:08,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:12:08,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:12:08,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120396807] [2021-01-06 17:12:08,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:12:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:08,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:12:08,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:12:08,312 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2021-01-06 17:12:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:08,424 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-01-06 17:12:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:12:08,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:12:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:08,426 INFO L225 Difference]: With dead ends: 27 [2021-01-06 17:12:08,427 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:12:08,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 17:12:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:12:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-01-06 17:12:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:12:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 17:12:08,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2021-01-06 17:12:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:08,440 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 17:12:08,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:12:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 17:12:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:12:08,441 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:08,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:08,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:12:08,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 635414898, now seen corresponding path program 1 times [2021-01-06 17:12:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:08,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400235801] [2021-01-06 17:12:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:08,676 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:08,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425824509] [2021-01-06 17:12:08,677 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 17:12:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:12:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:08,900 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 17:12:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400235801] [2021-01-06 17:12:08,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:08,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425824509] [2021-01-06 17:12:08,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:08,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:12:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747109992] [2021-01-06 17:12:08,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:12:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:12:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:12:08,909 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2021-01-06 17:12:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:09,145 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-01-06 17:12:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:12:09,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:12:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:09,146 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:12:09,147 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:12:09,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:12:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:12:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-01-06 17:12:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:12:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:12:09,157 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-01-06 17:12:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:09,157 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:12:09,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:12:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:12:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:12:09,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:09,158 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:09,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:09,377 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 790362413, now seen corresponding path program 2 times [2021-01-06 17:12:09,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:09,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510316266] [2021-01-06 17:12:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:09,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:09,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623294393] [2021-01-06 17:12:09,402 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 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 17:12:09,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 17:12:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:12:09,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:12:09,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510316266] [2021-01-06 17:12:09,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:09,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623294393] [2021-01-06 17:12:09,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:12:09,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:12:09,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496764997] [2021-01-06 17:12:09,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:12:09,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:12:09,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:12:09,481 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 4 states. [2021-01-06 17:12:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:09,531 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-01-06 17:12:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:12:09,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:12:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:09,533 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:12:09,533 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:12:09,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:12:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:12:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2021-01-06 17:12:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:12:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 17:12:09,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-01-06 17:12:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:09,539 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 17:12:09,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:12:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 17:12:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:12:09,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:09,540 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:09,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:09,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:09,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash -806594708, now seen corresponding path program 1 times [2021-01-06 17:12:09,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:09,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466012532] [2021-01-06 17:12:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:09,766 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:09,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803119246] [2021-01-06 17:12:09,767 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 17:12:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:12:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466012532] [2021-01-06 17:12:09,855 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:09,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803119246] [2021-01-06 17:12:09,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:12:09,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:12:09,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384661638] [2021-01-06 17:12:09,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:12:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:12:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:12:09,859 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2021-01-06 17:12:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:09,890 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-01-06 17:12:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:12:09,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 17:12:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:09,891 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:12:09,892 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:12:09,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:12:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:12:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:12:09,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:12:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:12:09,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-01-06 17:12:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:09,898 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:12:09,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:12:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:12:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:12:09,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:09,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:10,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:10,103 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2069079143, now seen corresponding path program 1 times [2021-01-06 17:12:10,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:10,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511135318] [2021-01-06 17:12:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:10,124 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:10,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555381514] [2021-01-06 17:12:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:12:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:10,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511135318] [2021-01-06 17:12:10,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:10,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555381514] [2021-01-06 17:12:10,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:10,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:12:10,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831842680] [2021-01-06 17:12:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:12:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:12:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:12:10,445 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 9 states. [2021-01-06 17:12:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:10,611 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2021-01-06 17:12:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:12:10,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 17:12:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:10,615 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:12:10,615 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:12:10,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:12:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:12:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 17:12:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:12:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-01-06 17:12:10,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 13 [2021-01-06 17:12:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:10,630 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-01-06 17:12:10,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:12:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-01-06 17:12:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:12:10,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:10,632 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:10,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:12:10,847 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash -367288670, now seen corresponding path program 2 times [2021-01-06 17:12:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:10,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392658486] [2021-01-06 17:12:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:10,863 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:10,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254330587] [2021-01-06 17:12:10,864 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 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 [2021-01-06 17:12:10,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:12:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:12:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:11,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392658486] [2021-01-06 17:12:11,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:11,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254330587] [2021-01-06 17:12:11,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:11,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:12:11,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544935435] [2021-01-06 17:12:11,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:12:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:12:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:12:11,223 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2021-01-06 17:12:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:11,586 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-01-06 17:12:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:12:11,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:12:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:11,589 INFO L225 Difference]: With dead ends: 57 [2021-01-06 17:12:11,590 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:12:11,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:12:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:12:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-01-06 17:12:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:12:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-01-06 17:12:11,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-01-06 17:12:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:11,608 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-01-06 17:12:11,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:12:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-01-06 17:12:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:12:11,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:11,609 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:11,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:11,815 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash -959580643, now seen corresponding path program 3 times [2021-01-06 17:12:11,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:11,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936494340] [2021-01-06 17:12:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:11,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:11,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508679387] [2021-01-06 17:12:11,830 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 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 [2021-01-06 17:12:11,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:12:11,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:12:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:12:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936494340] [2021-01-06 17:12:12,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:12,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508679387] [2021-01-06 17:12:12,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:12:12,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489380763] [2021-01-06 17:12:12,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:12:12,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:12:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:12:12,085 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2021-01-06 17:12:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:12,159 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-01-06 17:12:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:12:12,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 17:12:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:12,167 INFO L225 Difference]: With dead ends: 48 [2021-01-06 17:12:12,168 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:12:12,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:12:12,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:12:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-01-06 17:12:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:12:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-01-06 17:12:12,182 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-01-06 17:12:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:12,182 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-01-06 17:12:12,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:12:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-01-06 17:12:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:12:12,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:12,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:12,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:12,388 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1346954020, now seen corresponding path program 4 times [2021-01-06 17:12:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:12,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737302276] [2021-01-06 17:12:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:12,407 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:12,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385232584] [2021-01-06 17:12:12,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-01-06 17:12:12,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:12:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:12:12,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:12,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737302276] [2021-01-06 17:12:12,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:12,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385232584] [2021-01-06 17:12:12,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:12,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:12:12,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881831722] [2021-01-06 17:12:12,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:12:12,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:12,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:12:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:12:12,621 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2021-01-06 17:12:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:12,670 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:12:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:12:12,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-01-06 17:12:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:12,671 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:12:12,671 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:12:12,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:12:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:12:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:12:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:12:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 17:12:12,676 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-01-06 17:12:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:12,676 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 17:12:12,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:12:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 17:12:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:12:12,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:12,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:12:12,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:12:12,892 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash 691110295, now seen corresponding path program 5 times [2021-01-06 17:12:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:12,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52391] [2021-01-06 17:12:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:12,905 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:12,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720715160] [2021-01-06 17:12:12,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-01-06 17:12:13,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:12:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:13,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:12:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:13,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52391] [2021-01-06 17:12:13,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:13,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720715160] [2021-01-06 17:12:13,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:13,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:12:13,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750013385] [2021-01-06 17:12:13,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:12:13,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:13,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:12:13,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:12:13,458 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2021-01-06 17:12:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:13,875 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-01-06 17:12:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:12:13,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2021-01-06 17:12:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:13,876 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:12:13,876 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 17:12:13,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:12:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 17:12:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-01-06 17:12:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:12:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-01-06 17:12:13,891 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 19 [2021-01-06 17:12:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:13,892 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-01-06 17:12:13,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:12:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-01-06 17:12:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:12:13,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:13,894 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:12:14,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:14,100 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 765830034, now seen corresponding path program 6 times [2021-01-06 17:12:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:14,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893549438] [2021-01-06 17:12:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:14,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:14,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501290021] [2021-01-06 17:12:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-01-06 17:12:14,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:12:14,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:14,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:12:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:14,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893549438] [2021-01-06 17:12:14,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501290021] [2021-01-06 17:12:14,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:14,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:12:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728735008] [2021-01-06 17:12:14,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:12:14,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:12:14,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:12:14,868 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 13 states. [2021-01-06 17:12:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:15,503 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-01-06 17:12:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:12:15,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2021-01-06 17:12:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:15,504 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:12:15,504 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 17:12:15,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:12:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 17:12:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-01-06 17:12:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:12:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 17:12:15,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2021-01-06 17:12:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:15,513 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 17:12:15,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:12:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 17:12:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:12:15,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:15,514 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:12:15,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:15,720 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -442944819, now seen corresponding path program 7 times [2021-01-06 17:12:15,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:15,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303798913] [2021-01-06 17:12:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:15,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:15,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098890138] [2021-01-06 17:12:15,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:16,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 17:12:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:16,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303798913] [2021-01-06 17:12:16,550 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:16,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098890138] [2021-01-06 17:12:16,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:16,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 17:12:16,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252911874] [2021-01-06 17:12:16,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:12:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:12:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:12:16,557 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 14 states. [2021-01-06 17:12:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:17,181 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-01-06 17:12:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:12:17,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2021-01-06 17:12:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:17,184 INFO L225 Difference]: With dead ends: 90 [2021-01-06 17:12:17,184 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 17:12:17,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:12:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 17:12:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-01-06 17:12:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:12:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-01-06 17:12:17,194 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2021-01-06 17:12:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:17,194 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-01-06 17:12:17,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:12:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-01-06 17:12:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:12:17,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:17,195 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-01-06 17:12:17,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:12:17,400 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1409475084, now seen corresponding path program 8 times [2021-01-06 17:12:17,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:17,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686857119] [2021-01-06 17:12:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:17,414 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:17,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116260403] [2021-01-06 17:12:17,414 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:17,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:12:17,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:12:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:12:17,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686857119] [2021-01-06 17:12:17,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:17,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116260403] [2021-01-06 17:12:17,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:12:17,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:12:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375591017] [2021-01-06 17:12:17,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:12:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:17,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:12:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:12:17,905 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 8 states. [2021-01-06 17:12:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:18,004 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-01-06 17:12:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:12:18,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 17:12:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:18,005 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:12:18,006 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:12:18,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:12:18,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:12:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 17:12:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:12:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-01-06 17:12:18,023 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2021-01-06 17:12:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:18,024 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-01-06 17:12:18,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:12:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-01-06 17:12:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:12:18,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:18,025 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:12:18,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:12:18,239 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1860558664, now seen corresponding path program 9 times [2021-01-06 17:12:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:18,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021430729] [2021-01-06 17:12:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:18,267 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:12:18,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271170677] [2021-01-06 17:12:18,269 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:20,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:12:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:20,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:12:20,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:20,452 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:12:20,699 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:12:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021430729] [2021-01-06 17:12:20,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:12:20,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271170677] [2021-01-06 17:12:20,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:12:20,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:12:20,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:12:20,935 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:12:20,935 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:12:21,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:12:21,165 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:12:21,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:12:21 BoogieIcfgContainer [2021-01-06 17:12:21,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:12:21,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:12:21,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:12:21,167 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:12:21,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:12:07" (3/4) ... [2021-01-06 17:12:21,174 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:12:21,174 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:12:21,183 INFO L168 Benchmark]: Toolchain (without parser) took 14374.08 ms. Allocated memory was 165.7 MB in the beginning and 251.7 MB in the end (delta: 86.0 MB). Free memory was 141.2 MB in the beginning and 163.0 MB in the end (delta: -21.8 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,187 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 165.7 MB. Free memory is still 139.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:12:21,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.35 ms. Allocated memory is still 165.7 MB. Free memory was 140.8 MB in the beginning and 131.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,188 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,189 INFO L168 Benchmark]: Boogie Preprocessor took 23.37 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,189 INFO L168 Benchmark]: RCFGBuilder took 350.61 ms. Allocated memory is still 165.7 MB. Free memory was 128.6 MB in the beginning and 115.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,190 INFO L168 Benchmark]: TraceAbstraction took 13679.69 ms. Allocated memory was 165.7 MB in the beginning and 251.7 MB in the end (delta: 86.0 MB). Free memory was 115.0 MB in the beginning and 163.5 MB in the end (delta: -48.5 MB). Peak memory consumption was 113.3 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,191 INFO L168 Benchmark]: Witness Printer took 7.12 ms. Allocated memory is still 251.7 MB. Free memory was 163.5 MB in the beginning and 163.0 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:12:21,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 165.7 MB. Free memory is still 139.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.35 ms. Allocated memory is still 165.7 MB. Free memory was 140.8 MB in the beginning and 131.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 165.7 MB. Free memory was 131.1 MB in the beginning and 129.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.37 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 350.61 ms. Allocated memory is still 165.7 MB. Free memory was 128.6 MB in the beginning and 115.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13679.69 ms. Allocated memory was 165.7 MB in the beginning and 251.7 MB in the end (delta: 86.0 MB). Free memory was 115.0 MB in the beginning and 163.5 MB in the end (delta: -48.5 MB). Peak memory consumption was 113.3 MB. Max. memory is 8.0 GB. * Witness Printer took 7.12 ms. Allocated memory is still 251.7 MB. Free memory was 163.5 MB in the beginning and 163.0 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. 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: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] B = 1 [L30] q = 0 [L31] r = A [L32] b = B [L33] COND TRUE 1 [L34] COND FALSE !(!(r >= b)) [L35] b = 2 * b [L33] COND TRUE 1 [L34] COND FALSE !(!(r >= b)) [L35] b = 2 * b [L33] COND TRUE 1 [L34] COND FALSE !(!(r >= b)) [L35] b = 2 * b [L33] COND TRUE 1 [L34] COND FALSE !(!(r >= b)) [L35] b = 2 * b [L33] COND TRUE 1 [L34] COND FALSE !(!(r >= b)) [L35] b = 2 * b [L33] COND TRUE 1 [L34] COND TRUE !(r >= b) [L37] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L39] COND FALSE !(!(b != B)) [L40] q = 2 * q [L41] b = b / 2 [L42] COND TRUE r >= b [L43] q = q + 1 [L44] r = r - b [L37] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L39] COND FALSE !(!(b != B)) [L40] q = 2 * q [L41] b = b / 2 [L42] COND TRUE r >= b [L43] q = q + 1 [L44] r = r - b [L37] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 13.5s, OverallIterations: 14, TraceHistogramMax: 6, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 179 SDslu, 493 SDs, 0 SdLazy, 1561 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=12, 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, 13 MinimizatonAttempts, 118 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 192 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 34875 SizeOfPredicates, 66 NumberOfNonLiveVariables, 821 ConjunctsInSsa, 298 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 33/132 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...