/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/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:58:48,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:58:48,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:58:48,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:58:48,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:58:48,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:58:48,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:58:48,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:58:48,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:58:48,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:58:48,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:58:48,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:58:48,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:58:48,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:58:48,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:58:48,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:58:48,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:58:48,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:58:48,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:58:48,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:58:48,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:58:48,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:58:48,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:58:48,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:58:48,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:58:48,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:58:48,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:58:48,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:58:48,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:58:48,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:58:48,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:58:48,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:58:48,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:58:48,841 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:58:48,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:58:48,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:58:48,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:58:48,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:58:48,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:58:48,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:58:48,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:58:48,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:58:48,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:58:48,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:58:48,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:58:48,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:58:48,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:58:48,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:58:48,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:58:48,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:58:48,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:58:48,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:58:48,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:58:48,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:58:48,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:58:49,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:58:49,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:58:49,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:58:49,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:58:49,247 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:58:49,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/gauss_sum.i.p+lhb-reducer.c [2020-12-23 06:58:49,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/40aaf65c3/dc9523d3e4f646c694dcd2b327758e94/FLAGa71b48c67 [2020-12-23 06:58:49,896 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:58:49,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i.p+lhb-reducer.c [2020-12-23 06:58:49,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/40aaf65c3/dc9523d3e4f646c694dcd2b327758e94/FLAGa71b48c67 [2020-12-23 06:58:50,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/40aaf65c3/dc9523d3e4f646c694dcd2b327758e94 [2020-12-23 06:58:50,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:58:50,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:58:50,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:58:50,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:58:50,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:58:50,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@877985b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50, skipping insertion in model container [2020-12-23 06:58:50,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:58:50,321 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__n~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:58:50,486 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/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] left hand side expression in assignment: lhs: VariableLHS[~__return_96~0,GLOBAL] [2020-12-23 06:58:50,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:58:50,509 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__n~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__sum~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:58:50,531 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/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] left hand side expression in assignment: lhs: VariableLHS[~__return_96~0,GLOBAL] [2020-12-23 06:58:50,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:58:50,549 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:58:50,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50 WrapperNode [2020-12-23 06:58:50,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:58:50,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:58:50,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:58:50,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:58:50,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:58:50,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:58:50,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:58:50,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:58:50,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... [2020-12-23 06:58:50,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:58:50,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:58:50,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:58:50,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:58:50,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:58:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:58:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:58:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:58:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:58:51,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:58:51,093 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 06:58:51,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:58:51 BoogieIcfgContainer [2020-12-23 06:58:51,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:58:51,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:58:51,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:58:51,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:58:51,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:58:50" (1/3) ... [2020-12-23 06:58:51,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df4c56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:58:51, skipping insertion in model container [2020-12-23 06:58:51,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:58:50" (2/3) ... [2020-12-23 06:58:51,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df4c56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:58:51, skipping insertion in model container [2020-12-23 06:58:51,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:58:51" (3/3) ... [2020-12-23 06:58:51,107 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2020-12-23 06:58:51,115 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:58:51,121 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:58:51,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:58:51,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:58:51,174 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:58:51,174 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:58:51,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:58:51,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:58:51,175 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:58:51,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:58:51,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:58:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 06:58:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:58:51,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:51,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:51,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:51,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1390787819, now seen corresponding path program 1 times [2020-12-23 06:58:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:51,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881687461] [2020-12-23 06:58:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:51,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:51,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817675318] [2020-12-23 06:58:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:58:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:51,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:51,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881687461] [2020-12-23 06:58:51,853 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:51,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817675318] [2020-12-23 06:58:51,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:58:51,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 06:58:51,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222065372] [2020-12-23 06:58:51,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:58:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:58:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:58:51,877 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 9 states. [2020-12-23 06:58:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:52,100 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-23 06:58:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:58:52,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-23 06:58:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:52,111 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:58:52,111 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:58:52,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:58:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:58:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:58:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:58:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:58:52,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-23 06:58:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:52,152 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:58:52,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:58:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:58:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:58:52,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:52,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:52,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 06:58:52,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash -164811888, now seen corresponding path program 1 times [2020-12-23 06:58:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315851138] [2020-12-23 06:58:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:52,405 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954769033] [2020-12-23 06:58:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:58:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:52,710 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:52,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315851138] [2020-12-23 06:58:52,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954769033] [2020-12-23 06:58:52,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:52,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 06:58:52,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389241946] [2020-12-23 06:58:52,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:58:52,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:58:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:58:52,748 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-12-23 06:58:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:52,887 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:58:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:58:52,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 06:58:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:52,889 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:58:52,889 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:58:52,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:58:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:58:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:58:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:58:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:58:52,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-23 06:58:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:52,896 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:58:52,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:58:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:58:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:58:52,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:52,897 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:53,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:53,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash -814263691, now seen corresponding path program 2 times [2020-12-23 06:58:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:53,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492881002] [2020-12-23 06:58:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:53,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:53,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361781072] [2020-12-23 06:58:53,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:53,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:53,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:58:53,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:53,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492881002] [2020-12-23 06:58:53,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:53,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361781072] [2020-12-23 06:58:53,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:53,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 06:58:53,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921347343] [2020-12-23 06:58:53,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:58:53,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:53,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:58:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:58:53,520 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-12-23 06:58:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:53,668 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-23 06:58:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:58:53,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-23 06:58:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:53,670 INFO L225 Difference]: With dead ends: 19 [2020-12-23 06:58:53,670 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:58:53,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:58:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:58:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 06:58:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 06:58:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 06:58:53,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-23 06:58:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:53,676 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 06:58:53,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:58:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 06:58:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:58:53,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:53,677 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:53,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:53,892 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 527566896, now seen corresponding path program 3 times [2020-12-23 06:58:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757025868] [2020-12-23 06:58:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:53,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201290745] [2020-12-23 06:58:53,917 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:53,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:58:53,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:58:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:54,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757025868] [2020-12-23 06:58:54,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:54,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201290745] [2020-12-23 06:58:54,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 06:58:54,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046383830] [2020-12-23 06:58:54,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:58:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:58:54,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:58:54,147 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2020-12-23 06:58:54,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:54,273 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:58:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:58:54,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 06:58:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:54,274 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:58:54,274 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:58:54,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:58:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:58:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 06:58:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:58:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:58:54,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-23 06:58:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:54,279 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:58:54,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:58:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:58:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:58:54,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:54,280 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:54,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:54,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash -825357867, now seen corresponding path program 4 times [2020-12-23 06:58:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:54,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477001958] [2020-12-23 06:58:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:54,517 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:54,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435433052] [2020-12-23 06:58:54,517 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:54,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:54,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:58:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:54,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477001958] [2020-12-23 06:58:54,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:54,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435433052] [2020-12-23 06:58:54,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:54,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 06:58:54,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627029290] [2020-12-23 06:58:54,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:58:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:58:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:58:54,753 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2020-12-23 06:58:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:54,888 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-23 06:58:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:58:54,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-23 06:58:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:54,889 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:58:54,890 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:58:54,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:58:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:58:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:58:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:58:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 06:58:54,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-23 06:58:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:54,894 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 06:58:54,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:58:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 06:58:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:58:54,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:54,895 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:55,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:55,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash 183647440, now seen corresponding path program 5 times [2020-12-23 06:58:55,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:55,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431273748] [2020-12-23 06:58:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:55,141 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:55,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699648981] [2020-12-23 06:58:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:55,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 06:58:55,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:55,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:58:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:55,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431273748] [2020-12-23 06:58:55,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699648981] [2020-12-23 06:58:55,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:55,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 06:58:55,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318776820] [2020-12-23 06:58:55,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:58:55,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:55,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:58:55,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:58:55,407 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2020-12-23 06:58:55,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:55,542 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:58:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:58:55,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 06:58:55,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:55,543 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:58:55,544 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:58:55,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:58:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:58:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:58:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:58:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:58:55,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-23 06:58:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:55,548 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:58:55,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:58:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:58:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:58:55,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:55,549 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:55,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:55,764 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1398040885, now seen corresponding path program 6 times [2020-12-23 06:58:55,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:55,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006080899] [2020-12-23 06:58:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:55,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:55,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685089106] [2020-12-23 06:58:55,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:55,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:58:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:55,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:58:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:56,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:56,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006080899] [2020-12-23 06:58:56,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:56,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685089106] [2020-12-23 06:58:56,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:56,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 06:58:56,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587585655] [2020-12-23 06:58:56,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:58:56,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:58:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:58:56,070 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2020-12-23 06:58:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:56,218 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 06:58:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:58:56,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 06:58:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:56,219 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:58:56,219 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:58:56,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:58:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:58:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 06:58:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 06:58:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 06:58:56,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 06:58:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:56,225 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 06:58:56,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:58:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 06:58:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:58:56,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:56,226 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:56,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:56,440 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash 389532016, now seen corresponding path program 7 times [2020-12-23 06:58:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:56,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462870930] [2020-12-23 06:58:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:56,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733591040] [2020-12-23 06:58:56,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:56,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:58:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:56,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462870930] [2020-12-23 06:58:56,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733591040] [2020-12-23 06:58:56,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:56,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 06:58:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545517885] [2020-12-23 06:58:56,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:58:56,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:58:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:58:56,768 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2020-12-23 06:58:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:56,947 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:58:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:58:56,947 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-23 06:58:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:56,948 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:58:56,948 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:58:56,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:58:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:58:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 06:58:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:58:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:58:56,954 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-23 06:58:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:56,954 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:58:56,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:58:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:58:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:58:56,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:56,955 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:57,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 06:58:57,167 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -809471851, now seen corresponding path program 8 times [2020-12-23 06:58:57,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:57,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402910122] [2020-12-23 06:58:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:57,190 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:57,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624279544] [2020-12-23 06:58:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:57,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:57,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:57,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:58:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:57,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:57,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402910122] [2020-12-23 06:58:57,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:57,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624279544] [2020-12-23 06:58:57,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:57,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 06:58:57,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638509898] [2020-12-23 06:58:57,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:58:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:58:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:58:57,527 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2020-12-23 06:58:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:57,744 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 06:58:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:58:57,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-23 06:58:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:57,745 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:58:57,745 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:58:57,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:58:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:58:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:58:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:58:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 06:58:57,750 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-23 06:58:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:57,750 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 06:58:57,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:58:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 06:58:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:58:57,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:57,751 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:57,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:57,963 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 676113936, now seen corresponding path program 9 times [2020-12-23 06:58:57,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:57,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224817670] [2020-12-23 06:58:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:57,980 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:57,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387104444] [2020-12-23 06:58:57,981 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 06:58:58,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:58,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:58:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:58,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:58,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224817670] [2020-12-23 06:58:58,325 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:58,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387104444] [2020-12-23 06:58:58,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:58,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 06:58:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54060795] [2020-12-23 06:58:58,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:58:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:58:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:58:58,327 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2020-12-23 06:58:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:58,542 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:58:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:58:58,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-23 06:58:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:58,543 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:58:58,543 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:58:58,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:58:58,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:58:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:58:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:58:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:58:58,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-23 06:58:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:58,549 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:58:58,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:58:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:58:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:58:58,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:58,550 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:58,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,766 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -515366923, now seen corresponding path program 10 times [2020-12-23 06:58:58,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:58,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544678039] [2020-12-23 06:58:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:58,784 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:58,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037255989] [2020-12-23 06:58:58,784 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:58,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:58,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:58:58,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:59,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544678039] [2020-12-23 06:58:59,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:58:59,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037255989] [2020-12-23 06:58:59,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:58:59,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 06:58:59,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608968083] [2020-12-23 06:58:59,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:58:59,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:59,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:58:59,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:58:59,201 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2020-12-23 06:58:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:59,433 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 06:58:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:58:59,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 06:58:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:59,436 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:58:59,436 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:58:59,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:58:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:58:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 06:58:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:58:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 06:58:59,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-23 06:58:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:59,450 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 06:58:59,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:58:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 06:58:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:58:59,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:59,451 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:59,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 06:58:59,652 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1203432112, now seen corresponding path program 11 times [2020-12-23 06:58:59,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:59,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288369351] [2020-12-23 06:58:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:59,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:58:59,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707973158] [2020-12-23 06:58:59,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:59,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:58:59,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:59,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:58:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:00,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288369351] [2020-12-23 06:59:00,067 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:00,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707973158] [2020-12-23 06:59:00,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:00,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 06:59:00,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340018684] [2020-12-23 06:59:00,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:59:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:59:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:59:00,070 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2020-12-23 06:59:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:00,387 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:59:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:59:00,387 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-23 06:59:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:00,387 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:59:00,388 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:59:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:59:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:59:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 06:59:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:59:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:59:00,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-23 06:59:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:00,393 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:59:00,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:59:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:59:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:59:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:00,394 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:00,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:00,607 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1348372651, now seen corresponding path program 12 times [2020-12-23 06:59:00,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:00,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698792917] [2020-12-23 06:59:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:00,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:00,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521580795] [2020-12-23 06:59:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:00,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:59:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:00,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:59:00,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:01,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:01,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698792917] [2020-12-23 06:59:01,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:01,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521580795] [2020-12-23 06:59:01,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:01,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-23 06:59:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107809278] [2020-12-23 06:59:01,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:59:01,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:59:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:59:01,090 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2020-12-23 06:59:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:01,408 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-23 06:59:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:59:01,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-23 06:59:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:01,410 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:59:01,410 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:59:01,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:59:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:59:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 06:59:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:59:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-23 06:59:01,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-23 06:59:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:01,416 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-23 06:59:01,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:59:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-23 06:59:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:59:01,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:01,417 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:01,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:59:01,633 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1150058320, now seen corresponding path program 13 times [2020-12-23 06:59:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:01,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324416109] [2020-12-23 06:59:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:01,658 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:01,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691088536] [2020-12-23 06:59:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:01,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:59:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:02,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324416109] [2020-12-23 06:59:02,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:02,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691088536] [2020-12-23 06:59:02,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:02,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-23 06:59:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003475987] [2020-12-23 06:59:02,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:59:02,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:59:02,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:59:02,180 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2020-12-23 06:59:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:02,506 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:59:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:59:02,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 06:59:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:02,515 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:59:02,515 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:59:02,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:59:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:59:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:59:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:59:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:59:02,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-23 06:59:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:02,530 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:59:02,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:59:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:59:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:59:02,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:02,530 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:02,744 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1292007093, now seen corresponding path program 14 times [2020-12-23 06:59:02,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:02,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159897391] [2020-12-23 06:59:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:02,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:02,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078877563] [2020-12-23 06:59:02,762 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:02,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:02,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:59:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:03,293 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:03,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159897391] [2020-12-23 06:59:03,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:03,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078877563] [2020-12-23 06:59:03,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:03,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-23 06:59:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132839873] [2020-12-23 06:59:03,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:59:03,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:59:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:59:03,334 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2020-12-23 06:59:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:03,729 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 06:59:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:59:03,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-23 06:59:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:03,732 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:59:03,732 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:59:03,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:59:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:59:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 06:59:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:59:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 06:59:03,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-23 06:59:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:03,737 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 06:59:03,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:59:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 06:59:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:59:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:03,738 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:03,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:59:03,954 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1397451760, now seen corresponding path program 15 times [2020-12-23 06:59:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:03,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701359413] [2020-12-23 06:59:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:03,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:03,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371135641] [2020-12-23 06:59:03,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:04,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 06:59:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:04,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 06:59:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:04,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:04,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701359413] [2020-12-23 06:59:04,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:04,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371135641] [2020-12-23 06:59:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:04,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-23 06:59:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588171911] [2020-12-23 06:59:04,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:59:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:59:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:59:04,522 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2020-12-23 06:59:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:04,945 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:59:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:59:04,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-23 06:59:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:04,946 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:59:04,946 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:59:04,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:59:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:59:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:59:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:59:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:59:04,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-23 06:59:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:04,957 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:59:04,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:59:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:59:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:59:04,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:04,960 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:05,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:59:05,174 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:05,175 INFO L82 PathProgramCache]: Analyzing trace with hash 371269141, now seen corresponding path program 16 times [2020-12-23 06:59:05,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:05,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434841241] [2020-12-23 06:59:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:05,192 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:05,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622918146] [2020-12-23 06:59:05,192 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:05,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:05,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-23 06:59:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:05,704 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434841241] [2020-12-23 06:59:05,740 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622918146] [2020-12-23 06:59:05,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:05,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-23 06:59:05,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776434240] [2020-12-23 06:59:05,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:59:05,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:05,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:59:05,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:59:05,743 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2020-12-23 06:59:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:06,196 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-23 06:59:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:59:06,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-12-23 06:59:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:06,197 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:59:06,197 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:59:06,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:59:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:59:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:59:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:59:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 06:59:06,202 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-23 06:59:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:06,203 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 06:59:06,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:59:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 06:59:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:59:06,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:06,204 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:06,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:59:06,419 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1375620976, now seen corresponding path program 17 times [2020-12-23 06:59:06,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:06,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874549508] [2020-12-23 06:59:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:06,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:06,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248155645] [2020-12-23 06:59:06,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:06,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 06:59:06,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:06,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 06:59:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:07,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:07,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874549508] [2020-12-23 06:59:07,089 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:07,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248155645] [2020-12-23 06:59:07,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:07,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-23 06:59:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641241499] [2020-12-23 06:59:07,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:59:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:59:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:59:07,091 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2020-12-23 06:59:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:07,596 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:59:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:59:07,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-23 06:59:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:07,597 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:59:07,597 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:59:07,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:59:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:59:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:59:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:59:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:59:07,603 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-23 06:59:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:07,603 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:59:07,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:59:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:59:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:59:07,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:07,604 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:07,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:59:07,810 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:07,811 INFO L82 PathProgramCache]: Analyzing trace with hash 305360245, now seen corresponding path program 18 times [2020-12-23 06:59:07,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:07,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962579449] [2020-12-23 06:59:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:07,822 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:07,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340827296] [2020-12-23 06:59:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:08,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:59:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:08,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 06:59:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:09,424 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:09,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962579449] [2020-12-23 06:59:09,467 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:09,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340827296] [2020-12-23 06:59:09,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:09,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-23 06:59:09,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351626197] [2020-12-23 06:59:09,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:59:09,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:59:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:59:09,469 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2020-12-23 06:59:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:10,014 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-23 06:59:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:59:10,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-23 06:59:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:10,015 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:59:10,015 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:59:10,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:59:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:59:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 06:59:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:59:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-23 06:59:10,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-23 06:59:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:10,021 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-23 06:59:10,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:59:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-23 06:59:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:59:10,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:10,022 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:10,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:10,232 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:10,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash 876170544, now seen corresponding path program 19 times [2020-12-23 06:59:10,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:10,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984426531] [2020-12-23 06:59:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:10,247 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:10,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687143097] [2020-12-23 06:59:10,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:10,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-23 06:59:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:10,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984426531] [2020-12-23 06:59:11,003 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:11,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687143097] [2020-12-23 06:59:11,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:11,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-23 06:59:11,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236310240] [2020-12-23 06:59:11,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:59:11,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:59:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:59:11,005 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2020-12-23 06:59:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:11,592 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:59:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:59:11,593 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-23 06:59:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:11,594 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:59:11,594 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:59:11,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:59:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:59:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 06:59:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:59:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:59:11,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-23 06:59:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:11,600 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:59:11,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:59:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:59:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:59:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:11,600 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:11,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:11,806 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1391420629, now seen corresponding path program 20 times [2020-12-23 06:59:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:11,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741832806] [2020-12-23 06:59:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:11,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:11,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693269123] [2020-12-23 06:59:11,820 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:11,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:11,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:11,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 113 conjunts are in the unsatisfiable core [2020-12-23 06:59:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:12,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:12,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741832806] [2020-12-23 06:59:12,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:12,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693269123] [2020-12-23 06:59:12,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:12,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-23 06:59:12,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527436912] [2020-12-23 06:59:12,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:59:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:59:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:59:12,600 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2020-12-23 06:59:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:13,162 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-23 06:59:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:59:13,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-23 06:59:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:13,163 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:59:13,163 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:59:13,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:59:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:59:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-23 06:59:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:59:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-23 06:59:13,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-23 06:59:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:13,168 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-23 06:59:13,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:59:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-23 06:59:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:59:13,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:13,169 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:13,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:59:13,373 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash 184304080, now seen corresponding path program 21 times [2020-12-23 06:59:13,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:13,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182391866] [2020-12-23 06:59:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:13,385 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:13,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011837774] [2020-12-23 06:59:13,386 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:13,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 06:59:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:13,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-23 06:59:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:14,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:14,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182391866] [2020-12-23 06:59:14,301 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:14,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011837774] [2020-12-23 06:59:14,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:14,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-23 06:59:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239855401] [2020-12-23 06:59:14,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:59:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:59:14,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:59:14,303 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2020-12-23 06:59:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:15,005 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:59:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:59:15,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-23 06:59:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:15,006 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:59:15,006 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 06:59:15,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:59:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 06:59:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 06:59:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:59:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:59:15,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-23 06:59:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:15,013 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:59:15,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:59:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:59:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:59:15,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:15,014 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:15,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:15,229 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1418396725, now seen corresponding path program 22 times [2020-12-23 06:59:15,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:15,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686983648] [2020-12-23 06:59:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:15,242 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:15,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053728819] [2020-12-23 06:59:15,243 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:15,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:15,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:15,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 119 conjunts are in the unsatisfiable core [2020-12-23 06:59:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:16,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686983648] [2020-12-23 06:59:16,104 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053728819] [2020-12-23 06:59:16,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:16,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-23 06:59:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302082725] [2020-12-23 06:59:16,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:59:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:59:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:59:16,106 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2020-12-23 06:59:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:16,854 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-23 06:59:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:59:16,855 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-12-23 06:59:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:16,855 INFO L225 Difference]: With dead ends: 39 [2020-12-23 06:59:16,855 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:59:16,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:59:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:59:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:59:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:59:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-23 06:59:16,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-23 06:59:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:16,862 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-23 06:59:16,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:59:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-23 06:59:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:59:16,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:16,863 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:17,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:59:17,078 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1020563056, now seen corresponding path program 23 times [2020-12-23 06:59:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:17,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577418638] [2020-12-23 06:59:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:17,090 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:17,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490534912] [2020-12-23 06:59:17,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:17,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:59:17,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:17,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-23 06:59:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:18,100 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:18,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577418638] [2020-12-23 06:59:18,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:18,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490534912] [2020-12-23 06:59:18,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:18,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-23 06:59:18,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181844525] [2020-12-23 06:59:18,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:59:18,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:18,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:59:18,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:59:18,152 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2020-12-23 06:59:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:18,970 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:59:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:59:18,971 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-23 06:59:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:18,972 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:59:18,972 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:59:18,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:59:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:59:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 06:59:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:59:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:59:18,978 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-23 06:59:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:59:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:59:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:59:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:59:18,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:18,980 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:19,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:19,193 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1572621205, now seen corresponding path program 24 times [2020-12-23 06:59:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:19,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681234696] [2020-12-23 06:59:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:19,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:19,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772800251] [2020-12-23 06:59:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:20,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:59:20,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:20,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-23 06:59:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:21,090 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681234696] [2020-12-23 06:59:21,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:21,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772800251] [2020-12-23 06:59:21,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:21,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-23 06:59:21,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128926315] [2020-12-23 06:59:21,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:59:21,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:59:21,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:59:21,146 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2020-12-23 06:59:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:21,972 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 06:59:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:59:21,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-12-23 06:59:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:21,973 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:59:21,973 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:59:21,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:59:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:59:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 06:59:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:59:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 06:59:21,979 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-23 06:59:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:21,980 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 06:59:21,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:59:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 06:59:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:59:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:21,980 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:22,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:59:22,184 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:22,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1506554640, now seen corresponding path program 25 times [2020-12-23 06:59:22,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:22,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506040233] [2020-12-23 06:59:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:22,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:22,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543746272] [2020-12-23 06:59:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:22,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-23 06:59:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:23,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:23,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506040233] [2020-12-23 06:59:23,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:23,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543746272] [2020-12-23 06:59:23,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:23,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-23 06:59:23,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327189028] [2020-12-23 06:59:23,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:59:23,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:59:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:59:23,245 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2020-12-23 06:59:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:24,148 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:59:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:59:24,149 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-23 06:59:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:24,149 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:59:24,150 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:59:24,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:59:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:59:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 06:59:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:59:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:59:24,155 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-23 06:59:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:24,156 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:59:24,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:59:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:59:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:59:24,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:24,156 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:24,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:59:24,372 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash -541508875, now seen corresponding path program 26 times [2020-12-23 06:59:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:24,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925395561] [2020-12-23 06:59:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:24,384 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:24,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028821117] [2020-12-23 06:59:24,385 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:24,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:24,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-23 06:59:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:25,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925395561] [2020-12-23 06:59:25,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028821117] [2020-12-23 06:59:25,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:25,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-23 06:59:25,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878524646] [2020-12-23 06:59:25,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:59:25,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:25,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:59:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:59:25,519 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2020-12-23 06:59:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:26,502 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-23 06:59:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:59:26,503 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-12-23 06:59:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:26,503 INFO L225 Difference]: With dead ends: 43 [2020-12-23 06:59:26,503 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:59:26,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:59:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:59:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-23 06:59:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:59:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-23 06:59:26,510 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-23 06:59:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:26,510 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-23 06:59:26,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:59:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-23 06:59:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:59:26,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:26,511 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:26,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:59:26,726 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:26,727 INFO L82 PathProgramCache]: Analyzing trace with hash 393031600, now seen corresponding path program 27 times [2020-12-23 06:59:26,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:26,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769354387] [2020-12-23 06:59:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:26,738 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:26,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625584365] [2020-12-23 06:59:26,738 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:26,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 06:59:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:26,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-23 06:59:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:27,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:27,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769354387] [2020-12-23 06:59:27,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:27,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625584365] [2020-12-23 06:59:27,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:27,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-23 06:59:27,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825606655] [2020-12-23 06:59:27,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:59:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:27,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:59:27,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:59:27,971 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2020-12-23 06:59:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:29,029 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:59:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:59:29,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-23 06:59:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:29,030 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:59:29,030 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:59:29,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:59:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:59:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 06:59:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:59:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:59:29,036 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-23 06:59:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:29,037 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:59:29,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:59:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:59:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:59:29,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:29,037 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:29,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:59:29,250 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -700984747, now seen corresponding path program 28 times [2020-12-23 06:59:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:29,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458488950] [2020-12-23 06:59:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:29,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:29,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813067722] [2020-12-23 06:59:29,262 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:29,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:29,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:29,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 143 conjunts are in the unsatisfiable core [2020-12-23 06:59:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:30,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:30,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458488950] [2020-12-23 06:59:30,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:30,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813067722] [2020-12-23 06:59:30,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:30,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-23 06:59:30,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446539240] [2020-12-23 06:59:30,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:59:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:59:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:59:30,509 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2020-12-23 06:59:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:31,587 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-23 06:59:31,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:59:31,587 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-12-23 06:59:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:31,588 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:59:31,588 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:59:31,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:59:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:59:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 06:59:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:59:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-23 06:59:31,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-23 06:59:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:31,594 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-23 06:59:31,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:59:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-23 06:59:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:59:31,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:31,595 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:31,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:59:31,796 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -255753136, now seen corresponding path program 29 times [2020-12-23 06:59:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:31,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283134425] [2020-12-23 06:59:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:31,807 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:31,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177700391] [2020-12-23 06:59:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:31,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:59:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:31,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 147 conjunts are in the unsatisfiable core [2020-12-23 06:59:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:32,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283134425] [2020-12-23 06:59:33,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177700391] [2020-12-23 06:59:33,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:33,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-23 06:59:33,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35849319] [2020-12-23 06:59:33,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:59:33,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:33,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:59:33,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:59:33,033 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2020-12-23 06:59:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:34,226 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:59:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:59:34,227 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-23 06:59:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:34,227 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:59:34,227 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:59:34,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:59:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:59:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 06:59:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:59:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:59:34,232 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-23 06:59:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:34,233 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:59:34,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:59:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:59:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:59:34,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:34,234 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:34,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:34,447 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash 661524917, now seen corresponding path program 30 times [2020-12-23 06:59:34,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:34,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823846277] [2020-12-23 06:59:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:34,458 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:34,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348249029] [2020-12-23 06:59:34,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:35,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:59:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:35,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-23 06:59:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:36,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:36,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823846277] [2020-12-23 06:59:36,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:36,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348249029] [2020-12-23 06:59:36,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:36,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-23 06:59:36,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883802407] [2020-12-23 06:59:36,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:59:36,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:59:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:59:36,790 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2020-12-23 06:59:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:38,075 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-23 06:59:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:59:38,076 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-12-23 06:59:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:38,077 INFO L225 Difference]: With dead ends: 47 [2020-12-23 06:59:38,077 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:59:38,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:59:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:59:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 06:59:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 06:59:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-23 06:59:38,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-23 06:59:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:38,082 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-23 06:59:38,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:59:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-23 06:59:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:59:38,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:38,083 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:38,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:38,297 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -967626512, now seen corresponding path program 31 times [2020-12-23 06:59:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:38,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241385981] [2020-12-23 06:59:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:38,310 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:38,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377906334] [2020-12-23 06:59:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:38,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 155 conjunts are in the unsatisfiable core [2020-12-23 06:59:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:39,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:39,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241385981] [2020-12-23 06:59:39,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:39,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377906334] [2020-12-23 06:59:39,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:39,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-23 06:59:39,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994589536] [2020-12-23 06:59:39,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:59:39,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:39,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:59:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:59:39,830 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2020-12-23 06:59:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:41,190 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:59:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:59:41,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-23 06:59:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:41,191 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:59:41,191 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:59:41,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:59:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:59:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 06:59:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:59:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:59:41,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-23 06:59:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:41,198 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:59:41,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:59:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:59:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:59:41,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:41,199 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:41,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 06:59:41,401 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:41,402 INFO L82 PathProgramCache]: Analyzing trace with hash 68286741, now seen corresponding path program 32 times [2020-12-23 06:59:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:41,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791547173] [2020-12-23 06:59:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:41,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:41,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463814657] [2020-12-23 06:59:41,413 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:41,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:41,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 161 conjunts are in the unsatisfiable core [2020-12-23 06:59:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:42,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:42,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791547173] [2020-12-23 06:59:42,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:42,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463814657] [2020-12-23 06:59:42,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:42,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-23 06:59:42,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538030798] [2020-12-23 06:59:42,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:59:42,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:59:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:59:42,940 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2020-12-23 06:59:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:44,503 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-23 06:59:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:59:44,504 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-12-23 06:59:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:44,504 INFO L225 Difference]: With dead ends: 49 [2020-12-23 06:59:44,505 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:59:44,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:59:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:59:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:59:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 06:59:44,512 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-23 06:59:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:44,512 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 06:59:44,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:59:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 06:59:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:59:44,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:44,513 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:44,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:44,729 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2116826512, now seen corresponding path program 33 times [2020-12-23 06:59:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:44,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139430723] [2020-12-23 06:59:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:44,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824357641] [2020-12-23 06:59:44,742 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:44,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 06:59:44,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:44,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 165 conjunts are in the unsatisfiable core [2020-12-23 06:59:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:46,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:46,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139430723] [2020-12-23 06:59:46,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:46,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824357641] [2020-12-23 06:59:46,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:46,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-23 06:59:46,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283937005] [2020-12-23 06:59:46,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:59:46,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:59:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:59:46,391 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2020-12-23 06:59:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:47,950 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:59:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:59:47,951 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-23 06:59:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:47,952 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:59:47,952 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:59:47,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:59:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:59:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 06:59:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:59:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:59:47,957 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-23 06:59:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:47,957 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:59:47,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:59:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:59:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:59:47,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:47,958 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:48,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:59:48,159 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1197049973, now seen corresponding path program 34 times [2020-12-23 06:59:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779366406] [2020-12-23 06:59:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:48,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:48,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895255101] [2020-12-23 06:59:48,171 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:48,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:48,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:48,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 167 conjunts are in the unsatisfiable core [2020-12-23 06:59:48,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:49,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779366406] [2020-12-23 06:59:49,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895255101] [2020-12-23 06:59:49,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:49,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-23 06:59:49,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413033690] [2020-12-23 06:59:49,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:59:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:59:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:59:49,838 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2020-12-23 06:59:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:51,450 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-23 06:59:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:59:51,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-12-23 06:59:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:51,451 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:59:51,451 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:59:51,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:59:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:59:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 06:59:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 06:59:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-23 06:59:51,457 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-23 06:59:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:51,457 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-23 06:59:51,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:59:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-23 06:59:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 06:59:51,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:51,458 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:51,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:51,659 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1546218960, now seen corresponding path program 35 times [2020-12-23 06:59:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:51,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266599076] [2020-12-23 06:59:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:51,671 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:51,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434556878] [2020-12-23 06:59:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:51,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:59:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:51,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 171 conjunts are in the unsatisfiable core [2020-12-23 06:59:51,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:53,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266599076] [2020-12-23 06:59:53,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:53,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434556878] [2020-12-23 06:59:53,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:53,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-23 06:59:53,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520314292] [2020-12-23 06:59:53,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:59:53,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:59:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:59:53,431 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2020-12-23 06:59:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:55,286 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:59:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:59:55,287 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-23 06:59:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:55,288 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:59:55,288 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:59:55,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:59:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:59:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 06:59:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:59:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 06:59:55,294 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-23 06:59:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:55,294 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 06:59:55,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:59:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 06:59:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:59:55,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:55,295 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:55,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:59:55,509 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash -688209963, now seen corresponding path program 36 times [2020-12-23 06:59:55,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:55,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369845515] [2020-12-23 06:59:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:55,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 06:59:55,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901899879] [2020-12-23 06:59:55,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:56,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:59:56,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:56,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 177 conjunts are in the unsatisfiable core [2020-12-23 06:59:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:58,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:59:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:58,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369845515] [2020-12-23 06:59:58,366 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 06:59:58,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901899879] [2020-12-23 06:59:58,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:59:58,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-23 06:59:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536510280] [2020-12-23 06:59:58,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:59:58,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:59:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:59:58,368 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2020-12-23 07:00:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:00,341 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-23 07:00:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:00:00,342 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-12-23 07:00:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:00,343 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:00:00,343 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 07:00:00,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:00:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 07:00:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 07:00:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:00:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-23 07:00:00,349 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-23 07:00:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:00,350 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-23 07:00:00,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:00:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-23 07:00:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:00:00,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:00,350 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:00,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:00:00,551 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 140265168, now seen corresponding path program 37 times [2020-12-23 07:00:00,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:00,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61822410] [2020-12-23 07:00:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:00,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:00,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356849834] [2020-12-23 07:00:00,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:00,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 179 conjunts are in the unsatisfiable core [2020-12-23 07:00:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:02,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:02,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61822410] [2020-12-23 07:00:02,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:02,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356849834] [2020-12-23 07:00:02,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:02,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-23 07:00:02,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133664511] [2020-12-23 07:00:02,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:00:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:00:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:00:02,496 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2020-12-23 07:00:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:04,672 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 07:00:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 07:00:04,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-23 07:00:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:04,674 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:00:04,674 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:00:04,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:00:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:00:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 07:00:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:00:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 07:00:04,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-23 07:00:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:04,681 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 07:00:04,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:00:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 07:00:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:00:04,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:04,682 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:04,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:00:04,896 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 53190453, now seen corresponding path program 38 times [2020-12-23 07:00:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947349138] [2020-12-23 07:00:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:04,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:04,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114452042] [2020-12-23 07:00:04,909 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:05,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:05,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:05,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 185 conjunts are in the unsatisfiable core [2020-12-23 07:00:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:06,862 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947349138] [2020-12-23 07:00:06,944 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114452042] [2020-12-23 07:00:06,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:06,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-23 07:00:06,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864765372] [2020-12-23 07:00:06,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:00:06,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:00:06,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:00:06,945 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2020-12-23 07:00:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:09,278 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-23 07:00:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:00:09,279 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2020-12-23 07:00:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:09,280 INFO L225 Difference]: With dead ends: 55 [2020-12-23 07:00:09,280 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:00:09,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:00:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:00:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 07:00:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 07:00:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-23 07:00:09,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-23 07:00:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:09,285 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-23 07:00:09,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:00:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-23 07:00:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:00:09,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:09,286 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:09,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:00:09,487 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1648841584, now seen corresponding path program 39 times [2020-12-23 07:00:09,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:09,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014087025] [2020-12-23 07:00:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:09,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:09,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145439172] [2020-12-23 07:00:09,500 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:09,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 07:00:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:09,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 187 conjunts are in the unsatisfiable core [2020-12-23 07:00:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:11,564 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014087025] [2020-12-23 07:00:11,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:11,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145439172] [2020-12-23 07:00:11,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:00:11,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-23 07:00:11,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668304737] [2020-12-23 07:00:11,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:00:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:00:11,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:00:11,651 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2020-12-23 07:00:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:14,081 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 07:00:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:00:14,082 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-23 07:00:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:14,083 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:00:14,083 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:00:14,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:00:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:00:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 07:00:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:00:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 07:00:14,089 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-23 07:00:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:14,089 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 07:00:14,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:00:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 07:00:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:00:14,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:14,090 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:14,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:00:14,305 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -425580907, now seen corresponding path program 40 times [2020-12-23 07:00:14,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:14,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145364599] [2020-12-23 07:00:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:14,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:00:14,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240759428] [2020-12-23 07:00:14,317 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:14,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:14,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 191 conjunts are in the unsatisfiable core [2020-12-23 07:00:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:16,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:00:16,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:00:16,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145364599] [2020-12-23 07:00:16,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:00:16,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240759428] [2020-12-23 07:00:16,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:00:16,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:00:16,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:00:16,535 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:00:16,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:00:16,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:16,790 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:00:16,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:00:16 BoogieIcfgContainer [2020-12-23 07:00:16,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:00:16,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:00:16,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:00:16,793 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:00:16,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:58:51" (3/4) ... [2020-12-23 07:00:16,797 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:00:16,797 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:00:16,800 INFO L168 Benchmark]: Toolchain (without parser) took 86522.20 ms. Allocated memory was 173.0 MB in the beginning and 317.7 MB in the end (delta: 144.7 MB). Free memory was 147.6 MB in the beginning and 229.3 MB in the end (delta: -81.7 MB). Peak memory consumption was 64.3 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,800 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 173.0 MB. Free memory is still 143.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:00:16,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.79 ms. Allocated memory is still 173.0 MB. Free memory was 147.4 MB in the beginning and 137.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.71 ms. Allocated memory is still 173.0 MB. Free memory was 137.1 MB in the beginning and 135.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,803 INFO L168 Benchmark]: Boogie Preprocessor took 20.43 ms. Allocated memory is still 173.0 MB. Free memory was 135.6 MB in the beginning and 134.6 MB in the end (delta: 947.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,803 INFO L168 Benchmark]: RCFGBuilder took 485.87 ms. Allocated memory is still 173.0 MB. Free memory was 134.6 MB in the beginning and 121.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,804 INFO L168 Benchmark]: TraceAbstraction took 85694.56 ms. Allocated memory was 173.0 MB in the beginning and 317.7 MB in the end (delta: 144.7 MB). Free memory was 120.7 MB in the beginning and 229.8 MB in the end (delta: -109.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,804 INFO L168 Benchmark]: Witness Printer took 5.27 ms. Allocated memory is still 317.7 MB. Free memory was 229.8 MB in the beginning and 229.3 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:00:16,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 173.0 MB. Free memory is still 143.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.79 ms. Allocated memory is still 173.0 MB. Free memory was 147.4 MB in the beginning and 137.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.71 ms. Allocated memory is still 173.0 MB. Free memory was 137.1 MB in the beginning and 135.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.43 ms. Allocated memory is still 173.0 MB. Free memory was 135.6 MB in the beginning and 134.6 MB in the end (delta: 947.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.87 ms. Allocated memory is still 173.0 MB. Free memory was 134.6 MB in the beginning and 121.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 85694.56 ms. Allocated memory was 173.0 MB in the beginning and 317.7 MB in the end (delta: 144.7 MB). Free memory was 120.7 MB in the beginning and 229.8 MB in the end (delta: -109.1 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.27 ms. Allocated memory is still 317.7 MB. Free memory was 229.8 MB in the beginning and 229.3 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 69]: 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: [L1] int __return_main; [L12] int __return_96; [L15] int main__n; [L16] int main__sum; [L17] int main__i; [L18] main__n = __VERIFIER_nondet_int() [L19] COND FALSE !(!(1 <= main__n)) [L25] COND FALSE !(!(main__n <= 1000)) [L31] main__sum = 0 [L32] main__i = 1 [L33] COND TRUE main__i <= main__n [L35] main__sum = main__sum + main__i [L36] main__i = main__i + 1 [L37] COND TRUE main__i <= main__n [L39] main__sum = main__sum + main__i [L40] main__i = main__i + 1 [L41] COND TRUE main__i <= main__n [L43] main__sum = main__sum + main__i [L44] main__i = main__i + 1 [L45] COND TRUE main__i <= main__n [L47] main__sum = main__sum + main__i [L48] main__i = main__i + 1 [L49] COND TRUE main__i <= main__n [L51] main__sum = main__sum + main__i [L52] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND TRUE main__i <= main__n [L56] main__sum = main__sum + main__i [L57] main__i = main__i + 1 [L54] COND FALSE !(main__i <= main__n) [L63] int __tmp_1; [L64] __tmp_1 = (2 * main__sum) == (main__n * (main__n + 1)) [L65] int __VERIFIER_assert__cond; [L66] __VERIFIER_assert__cond = __tmp_1 [L67] COND TRUE __VERIFIER_assert__cond == 0 [L69] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 85.5s, OverallIterations: 41, TraceHistogramMax: 40, AutomataDifference: 32.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 256 SDtfs, 61 SDslu, 4297 SDs, 0 SdLazy, 35664 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1260 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 1100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 40 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 5.5s SatisfiabilityAnalysisTime, 33.5s InterpolantComputationTime, 1260 NumberOfCodeBlocks, 1260 NumberOfCodeBlocksAsserted, 256 NumberOfCheckSat, 1220 ConstructedInterpolants, 0 QuantifiedInterpolants, 329608 SizeOfPredicates, 171 NumberOfNonLiveVariables, 7020 ConjunctsInSsa, 4382 ConjunctsInUnsatCore, 40 InterpolantComputations, 1 PerfectInterpolantSequences, 0/10660 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...