/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:31:47,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:31:47,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:31:47,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:31:47,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:31:47,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:31:47,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:31:47,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:31:47,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:31:47,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:31:47,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:31:47,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:31:47,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:31:47,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:31:47,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:31:47,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:31:47,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:31:47,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:31:47,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:31:47,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:31:47,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:31:47,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:31:47,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:31:47,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:31:47,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:31:47,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:31:47,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:31:47,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:31:47,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:31:47,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:31:47,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:31:47,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:31:47,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:31:47,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:31:47,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:31:47,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:31:47,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:31:47,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:31:47,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:31:47,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:31:47,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:31:47,311 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:31:47,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:31:47,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:31:47,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:31:47,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:31:47,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:31:47,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:31:47,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:31:47,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:31:47,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:31:47,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:31:47,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:31:47,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:31:47,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:31:47,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:31:47,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:31:47,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:31:47,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:31:47,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:31:47,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:31:47,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:31:47,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:31:47,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:31:47,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:31:47,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:31:47,773 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:31:47,774 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:31:47,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2020-12-23 07:31:47,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd07ac58d/11c853cdc6514a13a1235ddc9643ccdd/FLAGb0c31b0ba [2020-12-23 07:31:48,438 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:31:48,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2020-12-23 07:31:48,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd07ac58d/11c853cdc6514a13a1235ddc9643ccdd/FLAGb0c31b0ba [2020-12-23 07:31:48,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd07ac58d/11c853cdc6514a13a1235ddc9643ccdd [2020-12-23 07:31:48,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:31:48,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:31:48,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:31:48,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:31:48,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:31:48,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:31:48" (1/1) ... [2020-12-23 07:31:48,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2a7c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:48, skipping insertion in model container [2020-12-23 07:31:48,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:31:48" (1/1) ... [2020-12-23 07:31:48,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:31:48,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:31:49,014 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.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,] [2020-12-23 07:31:49,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:31:49,048 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:31:49,064 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.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,] [2020-12-23 07:31:49,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:31:49,090 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:31:49,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49 WrapperNode [2020-12-23 07:31:49,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:31:49,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:31:49,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:31:49,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:31:49,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:31:49,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:31:49,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:31:49,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:31:49,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... [2020-12-23 07:31:49,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:31:49,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:31:49,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:31:49,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:31:49,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:31:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:31:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:31:49,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:31:49,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:31:49,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:31:49,586 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 07:31:49,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:31:49 BoogieIcfgContainer [2020-12-23 07:31:49,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:31:49,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:31:49,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:31:49,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:31:49,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:31:48" (1/3) ... [2020-12-23 07:31:49,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afa715e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:31:49, skipping insertion in model container [2020-12-23 07:31:49,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:31:49" (2/3) ... [2020-12-23 07:31:49,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afa715e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:31:49, skipping insertion in model container [2020-12-23 07:31:49,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:31:49" (3/3) ... [2020-12-23 07:31:49,610 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2020-12-23 07:31:49,631 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:31:49,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:31:49,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:31:49,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:31:49,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:31:49,714 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:31:49,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:31:49,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:31:49,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:31:49,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:31:49,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:31:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:31:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:31:49,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:49,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:49,787 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2020-12-23 07:31:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:49,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343242339] [2020-12-23 07:31:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:49,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343242339] [2020-12-23 07:31:49,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:31:49,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:31:49,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227469051] [2020-12-23 07:31:49,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:31:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:31:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:31:50,012 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 07:31:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:50,030 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2020-12-23 07:31:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:31:50,032 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:31:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:50,042 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:31:50,042 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:31:50,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:31:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:31:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:31:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:31:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-23 07:31:50,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2020-12-23 07:31:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:50,081 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-23 07:31:50,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:31:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-23 07:31:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:31:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:50,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:50,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:31:50,083 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2020-12-23 07:31:50,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:50,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492854892] [2020-12-23 07:31:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:50,102 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:50,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189769728] [2020-12-23 07:31:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:31:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492854892] [2020-12-23 07:31:50,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:50,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189769728] [2020-12-23 07:31:50,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:31:50,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:31:50,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283127731] [2020-12-23 07:31:50,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:31:50,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:31:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:31:50,248 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2020-12-23 07:31:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:50,273 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-23 07:31:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:31:50,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 07:31:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:50,274 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:31:50,274 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:31:50,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:31:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:31:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 07:31:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:31:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-23 07:31:50,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2020-12-23 07:31:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:50,281 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-23 07:31:50,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:31:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-23 07:31:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:31:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:50,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:50,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:31:50,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2020-12-23 07:31:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:50,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106923370] [2020-12-23 07:31:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:50,523 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:50,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17808665] [2020-12-23 07:31:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:31:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:50,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106923370] [2020-12-23 07:31:50,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17808665] [2020-12-23 07:31:50,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:31:50,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:31:50,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479135995] [2020-12-23 07:31:50,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:31:50,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:31:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:31:50,748 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-23 07:31:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:50,868 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-23 07:31:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:31:50,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 07:31:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:50,870 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:31:50,870 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:31:50,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:31:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:31:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-12-23 07:31:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:31:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-23 07:31:50,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2020-12-23 07:31:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:50,877 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-23 07:31:50,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:31:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-23 07:31:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:31:50,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:50,879 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:51,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:51,093 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2020-12-23 07:31:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:51,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040963087] [2020-12-23 07:31:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:51,114 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219011655] [2020-12-23 07:31:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:31:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040963087] [2020-12-23 07:31:51,223 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:51,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219011655] [2020-12-23 07:31:51,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:51,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:31:51,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30550395] [2020-12-23 07:31:51,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:31:51,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:31:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:31:51,226 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-23 07:31:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:51,257 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-12-23 07:31:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:31:51,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 07:31:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:51,259 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:31:51,259 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:31:51,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:31:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:31:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 07:31:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:31:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 07:31:51,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2020-12-23 07:31:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:51,265 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 07:31:51,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:31:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 07:31:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:31:51,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:51,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:51,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:51,481 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2020-12-23 07:31:51,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128081478] [2020-12-23 07:31:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:51,513 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:51,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973915758] [2020-12-23 07:31:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:31:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:51,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128081478] [2020-12-23 07:31:51,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:51,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973915758] [2020-12-23 07:31:51,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:51,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:31:51,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58997592] [2020-12-23 07:31:51,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:31:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:31:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:31:51,655 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-23 07:31:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:51,832 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-12-23 07:31:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:31:51,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 07:31:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:51,834 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:31:51,834 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 07:31:51,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:31:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 07:31:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-12-23 07:31:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:31:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:31:51,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2020-12-23 07:31:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:51,842 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:31:51,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:31:51,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:31:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:31:51,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:51,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:52,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:52,058 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2020-12-23 07:31:52,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:52,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226711340] [2020-12-23 07:31:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:52,086 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:52,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068071000] [2020-12-23 07:31:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:31:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226711340] [2020-12-23 07:31:52,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068071000] [2020-12-23 07:31:52,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:31:52,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:31:52,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231334746] [2020-12-23 07:31:52,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:31:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:31:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:31:52,169 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-23 07:31:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:52,196 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-12-23 07:31:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:31:52,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 07:31:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:52,197 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:31:52,198 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 07:31:52,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:31:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 07:31:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 07:31:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:31:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-23 07:31:52,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2020-12-23 07:31:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:52,204 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-23 07:31:52,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:31:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-23 07:31:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:31:52,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:52,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:52,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:31:52,416 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2020-12-23 07:31:52,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:52,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203817473] [2020-12-23 07:31:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:52,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:52,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214779283] [2020-12-23 07:31:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:31:52,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:52,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203817473] [2020-12-23 07:31:52,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:52,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214779283] [2020-12-23 07:31:52,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:52,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:31:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153393488] [2020-12-23 07:31:52,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:31:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:31:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:31:52,734 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2020-12-23 07:31:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:52,946 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-12-23 07:31:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:31:52,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 07:31:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:52,948 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:31:52,948 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:31:52,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:31:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:31:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-12-23 07:31:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 07:31:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-12-23 07:31:52,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2020-12-23 07:31:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:52,955 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-12-23 07:31:52,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:31:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-12-23 07:31:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:31:52,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:52,956 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:53,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:53,163 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2020-12-23 07:31:53,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:53,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614901893] [2020-12-23 07:31:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:53,181 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:53,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382630215] [2020-12-23 07:31:53,181 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:31:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:31:53,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614901893] [2020-12-23 07:31:53,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:53,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382630215] [2020-12-23 07:31:53,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:53,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:31:53,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011516854] [2020-12-23 07:31:53,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:31:53,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:53,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:31:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:31:53,308 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-12-23 07:31:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:53,345 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-12-23 07:31:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:31:53,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:31:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:53,346 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:31:53,346 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:31:53,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:31:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:31:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 07:31:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:31:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-23 07:31:53,352 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2020-12-23 07:31:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:53,352 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-23 07:31:53,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:31:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-23 07:31:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:31:53,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:53,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:53,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:53,569 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:53,570 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2020-12-23 07:31:53,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:53,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466381740] [2020-12-23 07:31:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:53,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:53,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883131602] [2020-12-23 07:31:53,586 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:53,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:31:53,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:31:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:31:53,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:53,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466381740] [2020-12-23 07:31:53,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:53,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883131602] [2020-12-23 07:31:53,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:53,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:31:53,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780707296] [2020-12-23 07:31:53,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:31:53,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:31:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:31:53,977 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2020-12-23 07:31:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:54,281 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-12-23 07:31:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:31:54,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 07:31:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:54,282 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:31:54,283 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:31:54,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:31:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:31:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2020-12-23 07:31:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:31:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-23 07:31:54,290 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2020-12-23 07:31:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:54,290 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-23 07:31:54,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:31:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-23 07:31:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:31:54,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:54,291 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:54,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:31:54,503 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2020-12-23 07:31:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:54,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651504348] [2020-12-23 07:31:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:54,519 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:54,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506237446] [2020-12-23 07:31:54,519 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:54,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:31:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:31:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:31:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:31:54,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651504348] [2020-12-23 07:31:54,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:54,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506237446] [2020-12-23 07:31:54,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:54,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:31:54,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972027851] [2020-12-23 07:31:54,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:31:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:31:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:31:54,641 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2020-12-23 07:31:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:54,697 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-12-23 07:31:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:31:54,697 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-23 07:31:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:54,698 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:31:54,698 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:31:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:31:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:31:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-23 07:31:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:31:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-23 07:31:54,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2020-12-23 07:31:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:54,705 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-23 07:31:54,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:31:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-23 07:31:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:31:54,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:54,706 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:54,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:54,922 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2020-12-23 07:31:54,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:54,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374812671] [2020-12-23 07:31:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:54,938 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:54,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540427371] [2020-12-23 07:31:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:31:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:55,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374812671] [2020-12-23 07:31:55,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:55,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540427371] [2020-12-23 07:31:55,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:55,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:31:55,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839961094] [2020-12-23 07:31:55,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:31:55,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:31:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:31:55,182 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-12-23 07:31:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:55,251 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-23 07:31:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:31:55,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-23 07:31:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:55,256 INFO L225 Difference]: With dead ends: 61 [2020-12-23 07:31:55,256 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:31:55,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:31:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:31:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:31:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:31:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-23 07:31:55,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2020-12-23 07:31:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:55,272 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-23 07:31:55,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:31:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-23 07:31:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:31:55,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:55,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:55,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:55,487 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2020-12-23 07:31:55,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:55,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005758031] [2020-12-23 07:31:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:55,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:55,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039246403] [2020-12-23 07:31:55,504 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 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 [2020-12-23 07:31:55,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:31:55,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:31:55,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:31:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:56,000 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2020-12-23 07:31:56,310 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:31:56,624 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:31:57,662 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:31:58,893 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:00,578 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:02,601 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:32:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005758031] [2020-12-23 07:32:03,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:03,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039246403] [2020-12-23 07:32:03,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:03,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:32:03,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795349975] [2020-12-23 07:32:03,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:32:03,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:03,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:32:03,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:32:03,297 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-12-23 07:32:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:03,808 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-23 07:32:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:32:03,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-23 07:32:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:03,810 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:32:03,810 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:32:03,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:32:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:32:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-23 07:32:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:32:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-23 07:32:03,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2020-12-23 07:32:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:03,817 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-23 07:32:03,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:32:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-23 07:32:03,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:32:03,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:03,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:04,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:32:04,019 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2020-12-23 07:32:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:04,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861146447] [2020-12-23 07:32:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:04,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:04,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162208414] [2020-12-23 07:32:04,048 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 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 [2020-12-23 07:32:04,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:32:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:32:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:32:04,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861146447] [2020-12-23 07:32:04,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:04,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162208414] [2020-12-23 07:32:04,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:04,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:32:04,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083884103] [2020-12-23 07:32:04,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:32:04,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:32:04,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:32:04,145 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-12-23 07:32:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:04,185 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-12-23 07:32:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:32:04,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-23 07:32:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:04,187 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:32:04,188 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:32:04,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:32:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:32:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-12-23 07:32:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 07:32:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-12-23 07:32:04,202 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2020-12-23 07:32:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:04,202 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-12-23 07:32:04,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:32:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-12-23 07:32:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:32:04,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:04,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:04,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:32:04,413 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2020-12-23 07:32:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:04,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633454962] [2020-12-23 07:32:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:04,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:04,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498178752] [2020-12-23 07:32:04,433 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 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 [2020-12-23 07:32:04,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:32:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:32:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:04,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:32:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:32:04,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633454962] [2020-12-23 07:32:04,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:04,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498178752] [2020-12-23 07:32:04,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:04,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:32:04,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281043066] [2020-12-23 07:32:04,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:32:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:32:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:32:04,884 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2020-12-23 07:32:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:05,164 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-12-23 07:32:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:32:05,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-23 07:32:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:05,166 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:32:05,167 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 07:32:05,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:32:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 07:32:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-12-23 07:32:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:32:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-23 07:32:05,173 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2020-12-23 07:32:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:05,174 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-23 07:32:05,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:32:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-23 07:32:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:32:05,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:05,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 07:32:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:32:05,379 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1793535410, now seen corresponding path program 4 times [2020-12-23 07:32:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:05,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556464918] [2020-12-23 07:32:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:05,391 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:05,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811162653] [2020-12-23 07:32:05,391 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:05,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:32:05,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:05,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:32:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:05,987 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-12-23 07:32:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:32:06,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556464918] [2020-12-23 07:32:06,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:06,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811162653] [2020-12-23 07:32:06,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:06,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:32:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064609801] [2020-12-23 07:32:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:32:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:32:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:32:06,117 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2020-12-23 07:32:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:06,501 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-12-23 07:32:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:32:06,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-23 07:32:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:06,503 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:32:06,503 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 07:32:06,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:32:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 07:32:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-12-23 07:32:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:32:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-23 07:32:06,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2020-12-23 07:32:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:06,509 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-23 07:32:06,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:32:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-23 07:32:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:32:06,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:06,510 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:06,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:06,714 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1780420744, now seen corresponding path program 1 times [2020-12-23 07:32:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:06,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640707235] [2020-12-23 07:32:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:06,728 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:06,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877681202] [2020-12-23 07:32:06,728 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:32:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:32:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:32:06,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640707235] [2020-12-23 07:32:06,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:06,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877681202] [2020-12-23 07:32:06,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:06,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:32:06,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730585313] [2020-12-23 07:32:06,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:32:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:32:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:32:06,867 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-12-23 07:32:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:06,929 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-12-23 07:32:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:32:06,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-23 07:32:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:06,930 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:32:06,930 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:32:06,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:32:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:32:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-23 07:32:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:32:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-23 07:32:06,936 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2020-12-23 07:32:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:06,936 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-23 07:32:06,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:32:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-23 07:32:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:32:06,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:06,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:07,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:32:07,151 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 848950570, now seen corresponding path program 3 times [2020-12-23 07:32:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:07,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766517156] [2020-12-23 07:32:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:07,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:07,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826860837] [2020-12-23 07:32:07,177 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:18,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:32:18,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:18,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:32:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:19,023 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766517156] [2020-12-23 07:32:19,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:19,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826860837] [2020-12-23 07:32:19,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:32:19,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:32:19,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:32:19,027 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:32:19,027 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:32:19,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:32:19,256 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:32:19,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:32:19 BoogieIcfgContainer [2020-12-23 07:32:19,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:32:19,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:32:19,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:32:19,257 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:32:19,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:31:49" (3/4) ... [2020-12-23 07:32:19,261 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:32:19,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:32:19,263 INFO L168 Benchmark]: Toolchain (without parser) took 30459.07 ms. Allocated memory was 153.1 MB in the beginning and 388.0 MB in the end (delta: 234.9 MB). Free memory was 128.0 MB in the beginning and 359.5 MB in the end (delta: -231.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,263 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:32:19,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.16 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 117.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,264 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,265 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 115.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,265 INFO L168 Benchmark]: RCFGBuilder took 425.02 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 102.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,266 INFO L168 Benchmark]: TraceAbstraction took 29660.55 ms. Allocated memory was 153.1 MB in the beginning and 388.0 MB in the end (delta: 234.9 MB). Free memory was 101.6 MB in the beginning and 359.5 MB in the end (delta: -257.9 MB). Peak memory consumption was 201.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:32:19,266 INFO L168 Benchmark]: Witness Printer took 4.42 ms. Allocated memory is still 388.0 MB. Free memory is still 359.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:32:19,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 153.1 MB. Free memory is still 124.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.16 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 117.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 153.1 MB. Free memory was 116.3 MB in the beginning and 115.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.02 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 102.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29660.55 ms. Allocated memory was 153.1 MB in the beginning and 388.0 MB in the end (delta: 234.9 MB). Free memory was 101.6 MB in the beginning and 359.5 MB in the end (delta: -257.9 MB). Peak memory consumption was 201.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.42 ms. Allocated memory is still 388.0 MB. Free memory is still 359.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_uint() [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] EXPR counter++ [L34] COND TRUE counter++<10 [L35] COND TRUE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<10 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] EXPR counter++ [L38] COND TRUE counter++<10 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] EXPR counter++ [L38] COND TRUE counter++<10 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 29.5s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 180 SDslu, 908 SDs, 0 SdLazy, 867 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=16, 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, 16 MinimizatonAttempts, 72 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 285 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 269 ConstructedInterpolants, 0 QuantifiedInterpolants, 52390 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 64/186 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...