/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-178dd20 [2021-01-06 17:26:08,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:26:08,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:26:08,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:26:08,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:26:08,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:26:08,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:26:08,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:26:08,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:26:08,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:26:08,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:26:08,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:26:08,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:26:08,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:26:08,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:26:08,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:26:08,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:26:08,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:26:08,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:26:08,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:26:08,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:26:08,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:26:08,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:26:08,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:26:08,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 17:26:08,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 17:26:08,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 17:26:08,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 17:26:08,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 17:26:08,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 17:26:08,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:26:08,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:26:08,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:26:08,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:26:08,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:26:08,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:26:08,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:26:08,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:26:08,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:26:08,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:26:08,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:26:08,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:26:08,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:26:08,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:26:08,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:26:08,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:26:08,360 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:26:08,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:26:08,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:26:08,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:26:08,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:26:08,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:26:08,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:26:08,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:26:08,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:26:08,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:26:08,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:26:08,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:26:08,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:26:08,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:26:08,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:26:08,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:26:08,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:26:08,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:26:08,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:26:08,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:26:08,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:26:08,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:26:08,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:26:08,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:26:08,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:26:08,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:26:08,762 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:26:08,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2021-01-06 17:26:08,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a192efec/aae805d1fdec4c84b75af9565e4dbfef/FLAG40d3691fc [2021-01-06 17:26:09,497 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:26:09,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2021-01-06 17:26:09,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a192efec/aae805d1fdec4c84b75af9565e4dbfef/FLAG40d3691fc [2021-01-06 17:26:09,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a192efec/aae805d1fdec4c84b75af9565e4dbfef [2021-01-06 17:26:09,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:26:09,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:26:09,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:09,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:26:09,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:26:09,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:09" (1/1) ... [2021-01-06 17:26:09,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741603c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:09, skipping insertion in model container [2021-01-06 17:26:09,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:09" (1/1) ... [2021-01-06 17:26:09,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:26:09,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:26:10,055 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,] [2021-01-06 17:26:10,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:10,088 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:26:10,105 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,] [2021-01-06 17:26:10,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:10,130 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:26:10,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10 WrapperNode [2021-01-06 17:26:10,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:10,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:10,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:26:10,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:26:10,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:10,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:26:10,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:26:10,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:26:10,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... [2021-01-06 17:26:10,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:26:10,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:26:10,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:26:10,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:26:10,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:26:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:26:10,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:26:10,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:26:10,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:26:10,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:26:10,849 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:26:10,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:10 BoogieIcfgContainer [2021-01-06 17:26:10,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:26:10,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:26:10,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:26:10,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:26:10,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:26:09" (1/3) ... [2021-01-06 17:26:10,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d40a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:10, skipping insertion in model container [2021-01-06 17:26:10,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:10" (2/3) ... [2021-01-06 17:26:10,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d40a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:10, skipping insertion in model container [2021-01-06 17:26:10,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:10" (3/3) ... [2021-01-06 17:26:10,891 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2021-01-06 17:26:10,898 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:26:10,903 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:26:10,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:26:11,005 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:26:11,005 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:26:11,005 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:26:11,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:26:11,006 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:26:11,006 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:26:11,009 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:26:11,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:26:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:26:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:26:11,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:11,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:11,057 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-01-06 17:26:11,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113130627] [2021-01-06 17:26:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:11,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113130627] [2021-01-06 17:26:11,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:11,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:26:11,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122182873] [2021-01-06 17:26:11,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:26:11,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:26:11,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:26:11,314 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:26:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:11,333 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-01-06 17:26:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:26:11,335 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:26:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:11,346 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:26:11,346 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:26:11,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:26:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:26:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:26:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:26:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 17:26:11,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-01-06 17:26:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 17:26:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:26:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 17:26:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:26:11,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:11,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:11,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:26:11,392 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-01-06 17:26:11,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:11,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391573288] [2021-01-06 17:26:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:11,410 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:11,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412859521] [2021-01-06 17:26:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:11,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:26:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391573288] [2021-01-06 17:26:11,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412859521] [2021-01-06 17:26:11,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:11,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011043625] [2021-01-06 17:26:11,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:26:11,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:11,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:26:11,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:26:11,560 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2021-01-06 17:26:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:11,594 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 17:26:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:26:11,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 17:26:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:11,596 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:26:11,596 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:26:11,597 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 [2021-01-06 17:26:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:26:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 17:26:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:26:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 17:26:11,602 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-01-06 17:26:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:11,602 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 17:26:11,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:26:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 17:26:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:26:11,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:11,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:11,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:26:11,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-01-06 17:26:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:11,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444297343] [2021-01-06 17:26:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:11,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:11,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341282753] [2021-01-06 17:26:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:11,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444297343] [2021-01-06 17:26:11,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341282753] [2021-01-06 17:26:11,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:11,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:26:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372734958] [2021-01-06 17:26:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:11,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:11,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:11,992 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 17:26:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:12,079 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-01-06 17:26:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:12,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 17:26:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:12,081 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:26:12,081 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:26:12,082 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 [2021-01-06 17:26:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:26:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 17:26:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:26:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 17:26:12,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-01-06 17:26:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 17:26:12,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 17:26:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:26:12,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:12,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:12,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:12,311 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-01-06 17:26:12,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:12,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225369192] [2021-01-06 17:26:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:12,331 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:12,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521080155] [2021-01-06 17:26:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225369192] [2021-01-06 17:26:12,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:12,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521080155] [2021-01-06 17:26:12,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:12,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:26:12,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80886368] [2021-01-06 17:26:12,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:12,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:12,422 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-06 17:26:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:12,451 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-01-06 17:26:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:12,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 17:26:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:12,453 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:26:12,453 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:26:12,454 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 [2021-01-06 17:26:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:26:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:26:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:26:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:26:12,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2021-01-06 17:26:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:12,460 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:26:12,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:26:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:26:12,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:12,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:12,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:12,675 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:12,676 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-01-06 17:26:12,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:12,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126861253] [2021-01-06 17:26:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:12,696 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:12,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647075742] [2021-01-06 17:26:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126861253] [2021-01-06 17:26:12,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:12,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647075742] [2021-01-06 17:26:12,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384753548] [2021-01-06 17:26:12,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:12,923 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-06 17:26:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:13,075 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-01-06 17:26:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:26:13,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:26:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:13,077 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:26:13,077 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:26:13,078 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 [2021-01-06 17:26:13,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:26:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 17:26:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:26:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:26:13,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2021-01-06 17:26:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:13,085 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:26:13,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:26:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:26:13,086 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:13,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:13,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:13,302 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2021-01-06 17:26:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:13,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278403816] [2021-01-06 17:26:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:13,323 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:13,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529231251] [2021-01-06 17:26:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:13,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278403816] [2021-01-06 17:26:13,401 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:13,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529231251] [2021-01-06 17:26:13,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:13,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:13,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553556698] [2021-01-06 17:26:13,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:26:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:26:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:26:13,406 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2021-01-06 17:26:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:13,441 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 17:26:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:26:13,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 17:26:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:13,442 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:26:13,443 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:26:13,444 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 [2021-01-06 17:26:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:26:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 17:26:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:26:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 17:26:13,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-01-06 17:26:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:13,459 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 17:26:13,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:26:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 17:26:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:26:13,460 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:13,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:13,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:26:13,674 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2021-01-06 17:26:13,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807112698] [2021-01-06 17:26:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:13,691 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:13,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351503831] [2021-01-06 17:26:13,691 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 [2021-01-06 17:26:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:13,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:26:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:13,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807112698] [2021-01-06 17:26:13,996 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:13,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351503831] [2021-01-06 17:26:13,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:13,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:26:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665497151] [2021-01-06 17:26:13,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:26:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:26:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:26:13,998 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2021-01-06 17:26:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:14,207 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-01-06 17:26:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:26:14,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 17:26:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:14,209 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:26:14,209 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:26:14,211 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 [2021-01-06 17:26:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:26:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-01-06 17:26:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:26:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 17:26:14,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2021-01-06 17:26:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:14,231 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 17:26:14,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:26:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 17:26:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:26:14,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:14,233 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:14,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:14,448 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:14,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:14,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2021-01-06 17:26:14,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:14,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603434074] [2021-01-06 17:26:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:14,469 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:14,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601996910] [2021-01-06 17:26:14,472 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 [2021-01-06 17:26:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:14,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:26:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:14,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603434074] [2021-01-06 17:26:14,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:14,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601996910] [2021-01-06 17:26:14,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:14,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337779898] [2021-01-06 17:26:14,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:14,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:14,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:14,620 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-01-06 17:26:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:14,664 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 17:26:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:26:14,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 17:26:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:14,666 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:26:14,666 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:26:14,667 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 [2021-01-06 17:26:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:26:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:26:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:26:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 17:26:14,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2021-01-06 17:26:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:14,673 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 17:26:14,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 17:26:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:26:14,674 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:14,674 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:14,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:14,888 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2021-01-06 17:26:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:14,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902323383] [2021-01-06 17:26:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:14,904 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:14,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808744747] [2021-01-06 17:26:14,905 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 [2021-01-06 17:26:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:26:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:15,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902323383] [2021-01-06 17:26:15,257 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:15,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808744747] [2021-01-06 17:26:15,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:15,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:26:15,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118367882] [2021-01-06 17:26:15,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:26:15,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:26:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:26:15,259 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2021-01-06 17:26:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:15,573 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-01-06 17:26:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:15,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 17:26:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:15,575 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:26:15,575 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:26:15,576 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 [2021-01-06 17:26:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:26:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-01-06 17:26:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:26:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:26:15,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2021-01-06 17:26:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:15,582 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:26:15,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:26:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:26:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:15,583 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:15,583 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:15,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:26:15,788 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2021-01-06 17:26:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:15,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242638755] [2021-01-06 17:26:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:15,805 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:15,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158844050] [2021-01-06 17:26:15,805 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 [2021-01-06 17:26:15,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:26:15,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242638755] [2021-01-06 17:26:15,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:15,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158844050] [2021-01-06 17:26:15,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:15,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744120958] [2021-01-06 17:26:15,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:26:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:26:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:15,933 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2021-01-06 17:26:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:15,994 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-01-06 17:26:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:26:15,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:26:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:15,996 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:26:15,996 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:26:15,997 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 [2021-01-06 17:26:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:26:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 17:26:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 17:26:16,017 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2021-01-06 17:26:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:16,017 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 17:26:16,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:26:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 17:26:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:16,021 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:16,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:16,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:16,238 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2021-01-06 17:26:16,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:16,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314753368] [2021-01-06 17:26:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:16,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:16,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859401353] [2021-01-06 17:26:16,253 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 [2021-01-06 17:26:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:26:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:16,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314753368] [2021-01-06 17:26:16,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:16,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859401353] [2021-01-06 17:26:16,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:16,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:16,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832408418] [2021-01-06 17:26:16,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:16,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:16,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:16,502 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2021-01-06 17:26:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:16,573 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-01-06 17:26:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:16,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-01-06 17:26:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:16,574 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:26:16,574 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:26:16,575 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 [2021-01-06 17:26:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:26:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:26:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-01-06 17:26:16,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2021-01-06 17:26:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:16,581 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-01-06 17:26:16,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-01-06 17:26:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:26:16,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:16,582 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:16,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:16,798 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2021-01-06 17:26:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048327710] [2021-01-06 17:26:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:16,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:16,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518057728] [2021-01-06 17:26:16,816 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 [2021-01-06 17:26:16,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:26:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:26:16,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:17,299 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2021-01-06 17:26:17,578 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:17,901 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:18,963 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:20,204 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:21,853 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:23,665 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:26:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048327710] [2021-01-06 17:26:24,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:24,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518057728] [2021-01-06 17:26:24,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:24,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:26:24,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497050351] [2021-01-06 17:26:24,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:26:24,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:26:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:24,400 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2021-01-06 17:26:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:24,914 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:26:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:26:24,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 17:26:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:24,916 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:26:24,916 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:26:24,917 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 [2021-01-06 17:26:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:26:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-01-06 17:26:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:26:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-01-06 17:26:24,923 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2021-01-06 17:26:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:24,923 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-01-06 17:26:24,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:26:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-01-06 17:26:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:24,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:24,924 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:25,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:26:25,131 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2021-01-06 17:26:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:25,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585949250] [2021-01-06 17:26:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:25,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:25,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192095116] [2021-01-06 17:26:25,166 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 [2021-01-06 17:26:25,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:26:25,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:26:25,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:26:25,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585949250] [2021-01-06 17:26:25,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:25,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192095116] [2021-01-06 17:26:25,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:25,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483539626] [2021-01-06 17:26:25,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:25,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:25,276 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2021-01-06 17:26:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:25,316 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-01-06 17:26:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:25,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-01-06 17:26:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:25,318 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:26:25,318 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:26:25,319 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 [2021-01-06 17:26:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:26:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-01-06 17:26:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:26:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-01-06 17:26:25,326 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2021-01-06 17:26:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:25,327 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-01-06 17:26:25,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-01-06 17:26:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:25,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:25,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:25,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:26:25,542 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:25,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2021-01-06 17:26:25,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:25,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977445390] [2021-01-06 17:26:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:25,554 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:25,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834969621] [2021-01-06 17:26:25,555 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 [2021-01-06 17:26:25,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:26:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:25,972 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:26:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:26,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977445390] [2021-01-06 17:26:26,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:26,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834969621] [2021-01-06 17:26:26,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:26,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:26:26,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972518126] [2021-01-06 17:26:26,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:26:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:26:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:26,003 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 12 states. [2021-01-06 17:26:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:26,321 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-01-06 17:26:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:26,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:26:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:26,322 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:26:26,322 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 17:26:26,323 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 [2021-01-06 17:26:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 17:26:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-01-06 17:26:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:26:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:26:26,328 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:26:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:26,329 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:26:26,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:26:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:26:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:26:26,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:26,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 17:26:26,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:26:26,530 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1793535410, now seen corresponding path program 4 times [2021-01-06 17:26:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:26,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701248350] [2021-01-06 17:26:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:26,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:26,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054194439] [2021-01-06 17:26:26,547 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 [2021-01-06 17:26:26,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:26:26,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:26:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:27,224 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-01-06 17:26:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701248350] [2021-01-06 17:26:27,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:27,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054194439] [2021-01-06 17:26:27,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:27,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:26:27,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540984458] [2021-01-06 17:26:27,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:26:27,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:27,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:26:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:26:27,355 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2021-01-06 17:26:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:27,730 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-01-06 17:26:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:27,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 17:26:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:27,732 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:26:27,732 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:26:27,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:26:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:26:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-01-06 17:26:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:26:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-01-06 17:26:27,737 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2021-01-06 17:26:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:27,738 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-01-06 17:26:27,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:26:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-01-06 17:26:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:26:27,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:27,739 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:27,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:27,943 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1780420744, now seen corresponding path program 1 times [2021-01-06 17:26:27,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:27,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817689196] [2021-01-06 17:26:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:27,956 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:27,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821564050] [2021-01-06 17:26:27,956 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 [2021-01-06 17:26:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:26:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:26:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817689196] [2021-01-06 17:26:28,089 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821564050] [2021-01-06 17:26:28,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:28,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:26:28,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949342490] [2021-01-06 17:26:28,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:26:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:26:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:28,091 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2021-01-06 17:26:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:28,152 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 17:26:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:28,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 17:26:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:28,153 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:26:28,153 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:26:28,154 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 [2021-01-06 17:26:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:26:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 17:26:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:26:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-01-06 17:26:28,158 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 26 [2021-01-06 17:26:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:28,159 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-01-06 17:26:28,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:26:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-01-06 17:26:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:26:28,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:28,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:28,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:26:28,369 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 848950570, now seen corresponding path program 3 times [2021-01-06 17:26:28,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:28,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852347849] [2021-01-06 17:26:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:28,382 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:28,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611790262] [2021-01-06 17:26:28,382 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 [2021-01-06 17:26:40,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:26:40,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:26:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:40,379 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:40,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852347849] [2021-01-06 17:26:40,382 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:40,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611790262] [2021-01-06 17:26:40,382 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:26:40,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:40,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:26:40,383 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:26:40,383 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:26:40,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:26:40,610 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:26:40,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:26:40 BoogieIcfgContainer [2021-01-06 17:26:40,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:26:40,611 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:26:40,611 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:26:40,611 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:26:40,612 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:10" (3/4) ... [2021-01-06 17:26:40,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:26:40,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:26:40,617 INFO L168 Benchmark]: Toolchain (without parser) took 30756.27 ms. Allocated memory was 155.2 MB in the beginning and 399.5 MB in the end (delta: 244.3 MB). Free memory was 130.5 MB in the beginning and 360.3 MB in the end (delta: -229.8 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,618 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:26:40,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.67 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 120.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.09 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 119.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,619 INFO L168 Benchmark]: Boogie Preprocessor took 59.73 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 118.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,620 INFO L168 Benchmark]: RCFGBuilder took 612.30 ms. Allocated memory is still 155.2 MB. Free memory was 117.8 MB in the beginning and 104.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,620 INFO L168 Benchmark]: TraceAbstraction took 29734.61 ms. Allocated memory was 155.2 MB in the beginning and 399.5 MB in the end (delta: 244.3 MB). Free memory was 138.0 MB in the beginning and 360.8 MB in the end (delta: -222.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:26:40,621 INFO L168 Benchmark]: Witness Printer took 4.95 ms. Allocated memory is still 399.5 MB. Free memory was 360.8 MB in the beginning and 360.3 MB in the end (delta: 506.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:26:40,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.67 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 120.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.09 ms. Allocated memory is still 155.2 MB. Free memory was 120.4 MB in the beginning and 119.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.73 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 118.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 612.30 ms. Allocated memory is still 155.2 MB. Free memory was 117.8 MB in the beginning and 104.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29734.61 ms. Allocated memory was 155.2 MB in the beginning and 399.5 MB in the end (delta: 244.3 MB). Free memory was 138.0 MB in the beginning and 360.8 MB in the end (delta: -222.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. * Witness Printer took 4.95 ms. Allocated memory is still 399.5 MB. Free memory was 360.8 MB in the beginning and 360.3 MB in the end (delta: 506.8 kB). 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, 0.9s SatisfiabilityAnalysisTime, 9.6s 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...