/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/reducercommutativity/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:56:56,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:56:56,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:56:57,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:56:57,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:56:57,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:56:57,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:56:57,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:56:57,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:56:57,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:56:57,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:56:57,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:56:57,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:56:57,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:56:57,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:56:57,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:56:57,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:56:57,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:56:57,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:56:57,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:56:57,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:56:57,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:56:57,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:56:57,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:56:57,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:56:57,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:56:57,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:56:57,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:56:57,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:56:57,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:56:57,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:56:57,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:56:57,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:56:57,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:56:57,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:56:57,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:56:57,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:56:57,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:56:57,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:56:57,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:56:57,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:56:57,166 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:56:57,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:56:57,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:56:57,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:56:57,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:56:57,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:56:57,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:56:57,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:56:57,170 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:56:57,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:56:57,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:56:57,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:56:57,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:56:57,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:57,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:56:57,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:56:57,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:56:57,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:56:57,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:56:57,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:56:57,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:56:57,173 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:56:57,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:56:57,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:56:57,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:56:57,723 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:56:57,724 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:56:57,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-21 21:56:57,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8983387c1/6441d020d6724c2da3d0dc610f9b08ed/FLAG42011fc71 [2020-12-21 21:56:58,760 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:56:58,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-21 21:56:58,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8983387c1/6441d020d6724c2da3d0dc610f9b08ed/FLAG42011fc71 [2020-12-21 21:56:59,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8983387c1/6441d020d6724c2da3d0dc610f9b08ed [2020-12-21 21:56:59,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:56:59,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:56:59,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:59,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:56:59,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:56:59,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bfce19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59, skipping insertion in model container [2020-12-21 21:56:59,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:56:59,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:56:59,305 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2020-12-21 21:56:59,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:59,324 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:56:59,358 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2020-12-21 21:56:59,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:59,393 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:56:59,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59 WrapperNode [2020-12-21 21:56:59,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:59,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:59,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:56:59,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:56:59,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:59,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:56:59,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:56:59,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:56:59,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... [2020-12-21 21:56:59,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:56:59,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:56:59,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:56:59,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:56:59,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:56:59,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:56:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:56:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:56:59,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:56:59,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:56:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:56:59,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:57:00,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:57:00,383 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:57:00,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:00 BoogieIcfgContainer [2020-12-21 21:57:00,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:57:00,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:57:00,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:57:00,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:57:00,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:56:59" (1/3) ... [2020-12-21 21:57:00,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aab66d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:00, skipping insertion in model container [2020-12-21 21:57:00,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:59" (2/3) ... [2020-12-21 21:57:00,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aab66d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:57:00, skipping insertion in model container [2020-12-21 21:57:00,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:57:00" (3/3) ... [2020-12-21 21:57:00,403 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2020-12-21 21:57:00,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:57:00,427 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:57:00,455 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:57:00,511 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:57:00,514 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:57:00,514 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:57:00,514 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:57:00,515 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:57:00,515 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:57:00,515 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:57:00,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:57:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-21 21:57:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:00,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:00,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:00,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-21 21:57:00,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216028272] [2020-12-21 21:57:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:00,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216028272] [2020-12-21 21:57:00,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:00,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:57:00,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6130299] [2020-12-21 21:57:00,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:57:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:00,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:57:00,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:57:00,950 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-21 21:57:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:00,976 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-21 21:57:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:57:00,983 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-21 21:57:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:01,023 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:57:01,023 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:57:01,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:57:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:57:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:57:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:57:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-21 21:57:01,081 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-21 21:57:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:01,081 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-21 21:57:01,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:57:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-21 21:57:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:57:01,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:01,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:01,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:57:01,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-21 21:57:01,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:01,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929476661] [2020-12-21 21:57:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:01,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:01,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105090163] [2020-12-21 21:57:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:01,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929476661] [2020-12-21 21:57:01,364 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:01,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105090163] [2020-12-21 21:57:01,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:01,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:57:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878687989] [2020-12-21 21:57:01,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:01,370 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-21 21:57:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:01,393 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-21 21:57:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:01,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:57:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:01,395 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:57:01,395 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:57:01,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:57:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:57:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-21 21:57:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:57:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:57:01,405 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-21 21:57:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:01,405 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:57:01,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:01,406 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:57:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:57:01,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:01,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:01,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:57:01,621 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-21 21:57:01,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:01,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214289132] [2020-12-21 21:57:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:57:01,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214289132] [2020-12-21 21:57:01,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950971927] [2020-12-21 21:57:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:57:01,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:01,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:01,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433363524] [2020-12-21 21:57:01,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:01,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:01,833 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:57:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:01,904 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-21 21:57:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:01,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-21 21:57:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:01,906 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:57:01,907 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:57:01,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:57:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-21 21:57:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:57:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-21 21:57:01,916 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-21 21:57:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:01,916 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-21 21:57:01,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-21 21:57:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:57:01,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:01,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:02,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:02,134 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-21 21:57:02,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:02,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622807637] [2020-12-21 21:57:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:57:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622807637] [2020-12-21 21:57:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094271036] [2020-12-21 21:57:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:57:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:02,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:02,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:02,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122461232] [2020-12-21 21:57:02,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:02,388 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-21 21:57:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:02,425 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-21 21:57:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:02,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-21 21:57:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:02,428 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:57:02,428 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:57:02,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:57:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 21:57:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:57:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-21 21:57:02,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-21 21:57:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:02,437 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-21 21:57:02,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-21 21:57:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:02,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:02,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:02,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:02,645 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-21 21:57:02,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:02,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379478922] [2020-12-21 21:57:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:02,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379478922] [2020-12-21 21:57:02,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502007710] [2020-12-21 21:57:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:57:02,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:02,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:57:02,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232550062] [2020-12-21 21:57:02,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:57:02,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:57:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:02,837 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-21 21:57:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:02,903 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-21 21:57:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:57:02,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-21 21:57:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:02,905 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:57:02,905 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:57:02,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:57:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-21 21:57:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:57:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:57:02,916 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-21 21:57:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:02,917 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:57:02,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:57:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:57:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:57:02,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:02,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:03,135 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-21 21:57:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846747925] [2020-12-21 21:57:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:03,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846747925] [2020-12-21 21:57:03,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290962203] [2020-12-21 21:57:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:57:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:03,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:57:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127804619] [2020-12-21 21:57:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:03,410 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-21 21:57:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:03,442 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-21 21:57:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:03,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-21 21:57:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:03,445 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:57:03,445 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:57:03,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:57:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:57:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:57:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-21 21:57:03,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-21 21:57:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:03,455 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-21 21:57:03,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-21 21:57:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:57:03,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:03,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:03,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:57:03,671 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-21 21:57:03,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:03,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123203781] [2020-12-21 21:57:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:57:03,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123203781] [2020-12-21 21:57:03,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81421199] [2020-12-21 21:57:03,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:03,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:57:03,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:03,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:03,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-21 21:57:03,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53527133] [2020-12-21 21:57:03,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:03,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:03,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:03,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:03,953 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-21 21:57:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,039 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-21 21:57:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:04,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-21 21:57:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,042 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:57:04,042 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:57:04,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:57:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-21 21:57:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:57:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-21 21:57:04,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-21 21:57:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,058 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-21 21:57:04,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-21 21:57:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:57:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:04,276 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,278 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-21 21:57:04,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447045429] [2020-12-21 21:57:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:57:04,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447045429] [2020-12-21 21:57:04,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726403296] [2020-12-21 21:57:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:57:04,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:57:04,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:57:04,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498889174] [2020-12-21 21:57:04,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:04,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:04,450 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-21 21:57:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:04,545 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-21 21:57:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:04,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:57:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:04,548 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:57:04,549 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:57:04,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:57:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-21 21:57:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:57:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-21 21:57:04,562 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-21 21:57:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:04,562 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-21 21:57:04,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-21 21:57:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:57:04,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:04,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:04,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:04,779 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-21 21:57:04,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:04,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061408216] [2020-12-21 21:57:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:04,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:04,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527753121] [2020-12-21 21:57:04,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:04,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:57:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061408216] [2020-12-21 21:57:05,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527753121] [2020-12-21 21:57:05,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:05,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961626559] [2020-12-21 21:57:05,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:05,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:05,044 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-21 21:57:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,071 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-21 21:57:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:05,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 21:57:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,074 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:57:05,074 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:57:05,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:57:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:57:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:57:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-21 21:57:05,086 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-21 21:57:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,086 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-21 21:57:05,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-21 21:57:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:57:05,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,088 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:57:05,302 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-21 21:57:05,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279664348] [2020-12-21 21:57:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:57:05,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279664348] [2020-12-21 21:57:05,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:05,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:05,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072593539] [2020-12-21 21:57:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:05,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:05,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:05,369 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-21 21:57:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,477 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-21 21:57:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:05,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-21 21:57:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,479 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:57:05,479 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:57:05,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:05,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:57:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-21 21:57:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-21 21:57:05,511 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-21 21:57:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,512 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-21 21:57:05,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-21 21:57:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:57:05,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,518 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:05,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 21:57:05,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-21 21:57:05,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:05,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580802618] [2020-12-21 21:57:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:05,553 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:05,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316588617] [2020-12-21 21:57:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:05,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580802618] [2020-12-21 21:57:05,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316588617] [2020-12-21 21:57:05,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:05,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:05,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246131983] [2020-12-21 21:57:05,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:05,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:05,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:05,753 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-21 21:57:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:05,782 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-21 21:57:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:05,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-21 21:57:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:05,784 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:57:05,784 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:05,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-21 21:57:05,791 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-21 21:57:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:05,791 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-21 21:57:05,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-21 21:57:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:57:05,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:05,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,008 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-21 21:57:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557647778] [2020-12-21 21:57:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,031 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:06,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340534347] [2020-12-21 21:57:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:06,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:06,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:06,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557647778] [2020-12-21 21:57:06,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:06,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340534347] [2020-12-21 21:57:06,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:06,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285703614] [2020-12-21 21:57:06,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:06,232 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-21 21:57:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,265 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-21 21:57:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:06,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 21:57:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,267 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:57:06,267 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:06,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-21 21:57:06,273 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-21 21:57:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,274 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-21 21:57:06,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-21 21:57:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:06,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:06,490 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-21 21:57:06,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118982711] [2020-12-21 21:57:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:06,522 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:06,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863353313] [2020-12-21 21:57:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:06,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:06,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:06,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-21 21:57:06,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118982711] [2020-12-21 21:57:06,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:06,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863353313] [2020-12-21 21:57:06,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:57:06,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:57:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142885846] [2020-12-21 21:57:06,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:06,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:06,704 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-21 21:57:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:06,743 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:57:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:06,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-21 21:57:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:06,747 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:57:06,747 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:57:06,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:57:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-21 21:57:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:57:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-21 21:57:06,757 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-21 21:57:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:06,758 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-21 21:57:06,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-21 21:57:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:57:06,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:06,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:06,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:57:06,976 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-21 21:57:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:06,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217159596] [2020-12-21 21:57:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,012 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:07,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706334493] [2020-12-21 21:57:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:07,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217159596] [2020-12-21 21:57:07,250 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:07,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706334493] [2020-12-21 21:57:07,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:07,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470324249] [2020-12-21 21:57:07,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:07,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:07,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:07,252 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-21 21:57:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,285 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-21 21:57:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:07,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 21:57:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,287 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:57:07,287 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:57:07,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:57:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:57:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:57:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-21 21:57:07,292 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-21 21:57:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,293 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-21 21:57:07,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-21 21:57:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:57:07,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:07,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:57:07,508 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-21 21:57:07,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:07,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789479672] [2020-12-21 21:57:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:07,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:07,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354539228] [2020-12-21 21:57:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:07,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:07,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:57:07,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789479672] [2020-12-21 21:57:07,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:07,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354539228] [2020-12-21 21:57:07,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:07,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:07,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682088873] [2020-12-21 21:57:07,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:07,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:07,798 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-21 21:57:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:07,844 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-21 21:57:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:07,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-21 21:57:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:07,846 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:07,846 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:57:07,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:57:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:57:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:57:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-21 21:57:07,851 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-21 21:57:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:07,852 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-21 21:57:07,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-21 21:57:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:57:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:07,853 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:57:08,067 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-21 21:57:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415695140] [2020-12-21 21:57:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,090 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727584516] [2020-12-21 21:57:08,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:08,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:57:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:57:08,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415695140] [2020-12-21 21:57:08,258 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:08,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727584516] [2020-12-21 21:57:08,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:08,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:57:08,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629105394] [2020-12-21 21:57:08,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:57:08,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:57:08,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:08,261 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-21 21:57:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,284 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-21 21:57:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:57:08,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-21 21:57:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,286 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:57:08,286 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:57:08,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:57:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:57:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-21 21:57:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:57:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-21 21:57:08,291 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-21 21:57:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,292 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-21 21:57:08,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:57:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-21 21:57:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:57:08,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,293 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:08,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:08,509 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-21 21:57:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:08,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382717] [2020-12-21 21:57:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:08,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:08,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407711429] [2020-12-21 21:57:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:08,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:08,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:57:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382717] [2020-12-21 21:57:08,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:08,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407711429] [2020-12-21 21:57:08,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:08,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442044099] [2020-12-21 21:57:08,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:08,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:08,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:08,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:08,671 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-21 21:57:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:08,773 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-21 21:57:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:08,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-21 21:57:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:08,774 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:57:08,774 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:57:08,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:57:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:57:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:57:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-21 21:57:08,783 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-21 21:57:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:08,785 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-21 21:57:08,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-21 21:57:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:57:08,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:08,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:57:09,002 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-21 21:57:09,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491857455] [2020-12-21 21:57:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,019 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144482306] [2020-12-21 21:57:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:09,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 21:57:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 21:57:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491857455] [2020-12-21 21:57:09,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144482306] [2020-12-21 21:57:09,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749222256] [2020-12-21 21:57:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:09,293 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-21 21:57:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:09,397 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-21 21:57:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:09,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-21 21:57:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:09,399 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:57:09,399 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:09,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-21 21:57:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:57:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-21 21:57:09,405 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-21 21:57:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:09,405 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-21 21:57:09,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-21 21:57:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:57:09,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:09,407 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:09,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:57:09,623 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-21 21:57:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:09,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403144905] [2020-12-21 21:57:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:09,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:09,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757550355] [2020-12-21 21:57:09,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:09,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:57:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:57:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403144905] [2020-12-21 21:57:10,043 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757550355] [2020-12-21 21:57:10,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:10,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:10,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626444213] [2020-12-21 21:57:10,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:10,049 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-21 21:57:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,081 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-21 21:57:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:10,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-21 21:57:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,085 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:57:10,085 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:57:10,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:57:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:57:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:57:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-21 21:57:10,095 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-21 21:57:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,095 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-21 21:57:10,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-21 21:57:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:57:10,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,096 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:10,305 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-21 21:57:10,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393030765] [2020-12-21 21:57:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963776236] [2020-12-21 21:57:10,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:57:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:10,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393030765] [2020-12-21 21:57:10,577 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963776236] [2020-12-21 21:57:10,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:10,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:57:10,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527808304] [2020-12-21 21:57:10,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:57:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:57:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:10,580 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-21 21:57:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:10,632 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-21 21:57:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:57:10,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-21 21:57:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:10,634 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:57:10,634 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:57:10,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:57:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:57:10,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:57:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:57:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-21 21:57:10,640 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-21 21:57:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:10,640 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-21 21:57:10,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:57:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-21 21:57:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:57:10,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:10,641 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:10,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:10,855 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-21 21:57:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:10,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220238798] [2020-12-21 21:57:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:10,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:10,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459225685] [2020-12-21 21:57:10,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:11,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:11,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-21 21:57:11,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220238798] [2020-12-21 21:57:11,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459225685] [2020-12-21 21:57:11,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 21:57:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576391026] [2020-12-21 21:57:11,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:57:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:57:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:11,258 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-21 21:57:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:11,305 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2020-12-21 21:57:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:57:11,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-21 21:57:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:11,309 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:57:11,309 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:57:11,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:57:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:57:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-21 21:57:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:57:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-21 21:57:11,321 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-21 21:57:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:11,321 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-21 21:57:11,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:57:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-21 21:57:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:57:11,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:11,322 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:11,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:11,527 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-21 21:57:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:11,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820188621] [2020-12-21 21:57:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:11,549 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:11,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76028469] [2020-12-21 21:57:11,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:11,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:57:11,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:57:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-21 21:57:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820188621] [2020-12-21 21:57:11,945 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76028469] [2020-12-21 21:57:11,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:11,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:57:11,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466867646] [2020-12-21 21:57:11,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:57:11,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:57:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:11,947 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-21 21:57:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,058 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-21 21:57:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:57:12,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-21 21:57:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,060 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:57:12,060 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:57:12,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:57:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:57:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-21 21:57:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:57:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-21 21:57:12,067 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-21 21:57:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,068 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-21 21:57:12,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:57:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-21 21:57:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:57:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,069 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:57:12,285 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-21 21:57:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091142558] [2020-12-21 21:57:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376188955] [2020-12-21 21:57:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:12,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:12,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-21 21:57:12,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091142558] [2020-12-21 21:57:12,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:12,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376188955] [2020-12-21 21:57:12,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:12,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:12,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629625586] [2020-12-21 21:57:12,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:12,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:12,490 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2020-12-21 21:57:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:12,620 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-12-21 21:57:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:12,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-12-21 21:57:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:12,622 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:57:12,622 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:57:12,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:57:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-21 21:57:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:57:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-12-21 21:57:12,630 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2020-12-21 21:57:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:12,631 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-12-21 21:57:12,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-12-21 21:57:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:57:12,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:12,633 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:12,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:57:12,848 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2020-12-21 21:57:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:12,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553889541] [2020-12-21 21:57:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:12,881 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:12,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686824796] [2020-12-21 21:57:12,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:13,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:57:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:57:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-21 21:57:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553889541] [2020-12-21 21:57:13,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:13,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686824796] [2020-12-21 21:57:13,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:13,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:57:13,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861587948] [2020-12-21 21:57:13,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:57:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:57:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:13,396 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2020-12-21 21:57:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:13,533 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2020-12-21 21:57:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:57:13,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-12-21 21:57:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:13,535 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:57:13,535 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 21:57:13,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:57:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 21:57:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2020-12-21 21:57:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:57:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-12-21 21:57:13,543 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2020-12-21 21:57:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:13,543 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-12-21 21:57:13,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:57:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-12-21 21:57:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:57:13,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:13,545 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:13,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:13,761 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:13,762 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2020-12-21 21:57:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:13,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816880686] [2020-12-21 21:57:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:13,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:13,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127745297] [2020-12-21 21:57:13,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:14,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:57:14,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:57:14,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816880686] [2020-12-21 21:57:14,226 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127745297] [2020-12-21 21:57:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321415080] [2020-12-21 21:57:14,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:14,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:14,228 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2020-12-21 21:57:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,256 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2020-12-21 21:57:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:14,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-12-21 21:57:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,258 INFO L225 Difference]: With dead ends: 150 [2020-12-21 21:57:14,258 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 21:57:14,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 21:57:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-21 21:57:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 21:57:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-12-21 21:57:14,265 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2020-12-21 21:57:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,266 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-12-21 21:57:14,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-12-21 21:57:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:57:14,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,268 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:14,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:57:14,482 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2020-12-21 21:57:14,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:14,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551451123] [2020-12-21 21:57:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:14,500 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216845241] [2020-12-21 21:57:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:57:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-12-21 21:57:14,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551451123] [2020-12-21 21:57:14,829 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:14,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216845241] [2020-12-21 21:57:14,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:14,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 21:57:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986756639] [2020-12-21 21:57:14,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:57:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:57:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:14,831 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 13 states. [2020-12-21 21:57:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:14,887 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2020-12-21 21:57:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:57:14,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 117 [2020-12-21 21:57:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:14,895 INFO L225 Difference]: With dead ends: 216 [2020-12-21 21:57:14,896 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:57:14,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:57:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:57:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-12-21 21:57:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-21 21:57:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2020-12-21 21:57:14,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 117 [2020-12-21 21:57:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:14,904 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2020-12-21 21:57:14,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:57:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2020-12-21 21:57:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-21 21:57:14,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:14,906 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:15,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:15,121 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1032300881, now seen corresponding path program 14 times [2020-12-21 21:57:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705570807] [2020-12-21 21:57:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:15,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:15,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017298789] [2020-12-21 21:57:15,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:15,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:57:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-12-21 21:57:15,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705570807] [2020-12-21 21:57:15,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:15,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017298789] [2020-12-21 21:57:15,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:15,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 21:57:15,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497754513] [2020-12-21 21:57:15,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:57:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:57:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:15,528 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 14 states. [2020-12-21 21:57:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:15,584 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2020-12-21 21:57:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:57:15,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-12-21 21:57:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:15,586 INFO L225 Difference]: With dead ends: 218 [2020-12-21 21:57:15,586 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 21:57:15,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:57:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 21:57:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-21 21:57:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-21 21:57:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-12-21 21:57:15,605 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 119 [2020-12-21 21:57:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:15,605 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-12-21 21:57:15,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:57:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-12-21 21:57:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 21:57:15,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:15,606 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:15,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:57:15,821 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1017408015, now seen corresponding path program 15 times [2020-12-21 21:57:15,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:15,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071396058] [2020-12-21 21:57:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:15,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920071838] [2020-12-21 21:57:15,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:16,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:57:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:57:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-21 21:57:16,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071396058] [2020-12-21 21:57:16,392 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:16,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920071838] [2020-12-21 21:57:16,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:16,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:57:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161459505] [2020-12-21 21:57:16,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:57:16,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:57:16,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:16,394 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 6 states. [2020-12-21 21:57:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:16,503 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2020-12-21 21:57:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:57:16,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2020-12-21 21:57:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:16,505 INFO L225 Difference]: With dead ends: 206 [2020-12-21 21:57:16,505 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:57:16,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:57:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:57:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-12-21 21:57:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-21 21:57:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-12-21 21:57:16,512 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 121 [2020-12-21 21:57:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:16,513 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-12-21 21:57:16,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:57:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-12-21 21:57:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 21:57:16,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:16,515 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:16,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:57:16,729 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:16,730 INFO L82 PathProgramCache]: Analyzing trace with hash 171712334, now seen corresponding path program 16 times [2020-12-21 21:57:16,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:16,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555434790] [2020-12-21 21:57:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:16,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:16,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761755556] [2020-12-21 21:57:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:16,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:57:16,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:57:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-12-21 21:57:16,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555434790] [2020-12-21 21:57:16,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:16,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761755556] [2020-12-21 21:57:16,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:16,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:57:16,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109033233] [2020-12-21 21:57:16,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:57:16,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:57:16,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:16,980 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 9 states. [2020-12-21 21:57:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:17,149 INFO L93 Difference]: Finished difference Result 229 states and 257 transitions. [2020-12-21 21:57:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:57:17,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-21 21:57:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:17,151 INFO L225 Difference]: With dead ends: 229 [2020-12-21 21:57:17,151 INFO L226 Difference]: Without dead ends: 143 [2020-12-21 21:57:17,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:57:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-21 21:57:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-12-21 21:57:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-21 21:57:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2020-12-21 21:57:17,160 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 130 [2020-12-21 21:57:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:17,161 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2020-12-21 21:57:17,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:57:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2020-12-21 21:57:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 21:57:17,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:17,162 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 7, 7, 7, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:17,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:57:17,376 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1108040979, now seen corresponding path program 17 times [2020-12-21 21:57:17,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:17,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471617139] [2020-12-21 21:57:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:17,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:17,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569749511] [2020-12-21 21:57:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:17,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-21 21:57:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:57:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-21 21:57:17,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471617139] [2020-12-21 21:57:17,993 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:17,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569749511] [2020-12-21 21:57:17,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:17,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:57:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023339277] [2020-12-21 21:57:17,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:57:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:57:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:17,995 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand 10 states. [2020-12-21 21:57:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:18,167 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2020-12-21 21:57:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:57:18,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-12-21 21:57:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:18,168 INFO L225 Difference]: With dead ends: 244 [2020-12-21 21:57:18,168 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:57:18,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:57:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:57:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-12-21 21:57:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-21 21:57:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2020-12-21 21:57:18,178 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 139 [2020-12-21 21:57:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:18,179 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2020-12-21 21:57:18,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:57:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2020-12-21 21:57:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-21 21:57:18,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:18,181 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:18,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:18,396 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1198235730, now seen corresponding path program 18 times [2020-12-21 21:57:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:18,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293287149] [2020-12-21 21:57:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:18,414 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:18,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537405895] [2020-12-21 21:57:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:18,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:57:18,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:57:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-21 21:57:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293287149] [2020-12-21 21:57:19,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537405895] [2020-12-21 21:57:19,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:19,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:57:19,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820718057] [2020-12-21 21:57:19,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:57:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:57:19,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:19,166 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand 7 states. [2020-12-21 21:57:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:19,199 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2020-12-21 21:57:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:57:19,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 148 [2020-12-21 21:57:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:19,201 INFO L225 Difference]: With dead ends: 192 [2020-12-21 21:57:19,202 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:57:19,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:57:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:57:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-21 21:57:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:57:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2020-12-21 21:57:19,211 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 148 [2020-12-21 21:57:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:19,211 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2020-12-21 21:57:19,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:57:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2020-12-21 21:57:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 21:57:19,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:19,214 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:19,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:57:19,429 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash -747380432, now seen corresponding path program 19 times [2020-12-21 21:57:19,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:19,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934811604] [2020-12-21 21:57:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:19,447 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:19,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542270914] [2020-12-21 21:57:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:57:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:57:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-21 21:57:19,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934811604] [2020-12-21 21:57:19,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:19,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542270914] [2020-12-21 21:57:19,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:19,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 21:57:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886737571] [2020-12-21 21:57:19,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:57:19,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:57:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,841 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand 15 states. [2020-12-21 21:57:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:19,903 INFO L93 Difference]: Finished difference Result 278 states and 304 transitions. [2020-12-21 21:57:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:57:19,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-12-21 21:57:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:19,905 INFO L225 Difference]: With dead ends: 278 [2020-12-21 21:57:19,905 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 21:57:19,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:57:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 21:57:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-21 21:57:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:57:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2020-12-21 21:57:19,915 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 150 [2020-12-21 21:57:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:19,915 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2020-12-21 21:57:19,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:57:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2020-12-21 21:57:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-21 21:57:19,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:19,917 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:20,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:57:20,131 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:20,132 INFO L82 PathProgramCache]: Analyzing trace with hash 881756338, now seen corresponding path program 20 times [2020-12-21 21:57:20,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:20,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655264815] [2020-12-21 21:57:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:20,169 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91711875] [2020-12-21 21:57:20,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:57:20,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:57:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:57:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:57:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:57:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-21 21:57:20,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655264815] [2020-12-21 21:57:20,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:57:20,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91711875] [2020-12-21 21:57:20,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:57:20,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 21:57:20,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298816511] [2020-12-21 21:57:20,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:57:20,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:57:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:57:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:20,585 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand 16 states. [2020-12-21 21:57:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:57:20,659 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2020-12-21 21:57:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:57:20,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 152 [2020-12-21 21:57:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:57:20,661 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:57:20,661 INFO L226 Difference]: Without dead ends: 156 [2020-12-21 21:57:20,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:57:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-21 21:57:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-21 21:57:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:57:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2020-12-21 21:57:20,670 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 152 [2020-12-21 21:57:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:57:20,670 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2020-12-21 21:57:20,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:57:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2020-12-21 21:57:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-21 21:57:20,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:57:20,672 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:57:20,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:57:20,886 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:57:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:57:20,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1180870732, now seen corresponding path program 21 times [2020-12-21 21:57:20,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:57:20,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562785884] [2020-12-21 21:57:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:57:20,907 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:57:20,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865608425] [2020-12-21 21:57:20,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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