/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:09:32,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:09:32,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:09:32,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:09:32,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:09:32,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:09:32,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:09:32,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:09:32,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:09:32,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:09:33,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:09:33,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:09:33,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:09:33,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:09:33,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:09:33,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:09:33,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:09:33,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:09:33,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:09:33,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:09:33,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:09:33,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:09:33,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:09:33,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:09:33,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:09:33,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:09:33,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:09:33,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:09:33,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:09:33,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:09:33,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:09:33,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:09:33,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:09:33,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:09:33,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:09:33,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:09:33,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 18:09:33,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:09:33,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:09:33,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:09:33,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:09:33,068 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:09:33,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:09:33,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:09:33,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:09:33,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:09:33,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:09:33,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:09:33,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:09:33,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:09:33,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:09:33,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:09:33,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:09:33,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:09:33,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:09:33,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:09:33,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:09:33,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:09:33,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:09:33,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:09:33,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:09:33,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:09:33,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:09:33,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:09:33,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:09:33,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:09:33,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:09:33,507 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:09:33,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-01-06 18:09:33,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/91ca99953/224307a0034c43c4a915e016995509a7/FLAG238d7a813 [2021-01-06 18:09:34,146 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:09:34,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-01-06 18:09:34,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/91ca99953/224307a0034c43c4a915e016995509a7/FLAG238d7a813 [2021-01-06 18:09:34,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/91ca99953/224307a0034c43c4a915e016995509a7 [2021-01-06 18:09:34,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:09:34,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:09:34,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:09:34,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:09:34,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:09:34,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f77376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34, skipping insertion in model container [2021-01-06 18:09:34,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:09:34,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:09:34,741 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 18:09:34,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:34,773 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:09:34,787 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 18:09:34,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:34,812 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:09:34,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34 WrapperNode [2021-01-06 18:09:34,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:09:34,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:34,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:09:34,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:09:34,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:34,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:09:34,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:09:34,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:09:34,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... [2021-01-06 18:09:34,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:09:34,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:09:34,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:09:34,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:09:34,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:09:34,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:09:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:09:34,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:09:34,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:09:35,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:09:35,259 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 18:09:35,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:35 BoogieIcfgContainer [2021-01-06 18:09:35,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:09:35,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:09:35,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:09:35,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:09:35,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:09:34" (1/3) ... [2021-01-06 18:09:35,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f97118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:35, skipping insertion in model container [2021-01-06 18:09:35,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:34" (2/3) ... [2021-01-06 18:09:35,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f97118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:35, skipping insertion in model container [2021-01-06 18:09:35,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:35" (3/3) ... [2021-01-06 18:09:35,272 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.c [2021-01-06 18:09:35,280 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:09:35,285 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-01-06 18:09:35,308 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-01-06 18:09:35,338 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:09:35,338 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:09:35,338 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:09:35,338 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:09:35,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:09:35,339 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:09:35,339 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:09:35,339 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:09:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-01-06 18:09:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 18:09:35,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:35,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 18:09:35,383 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-01-06 18:09:35,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:35,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802761749] [2021-01-06 18:09:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:35,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802761749] [2021-01-06 18:09:35,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:35,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:09:35,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962473415] [2021-01-06 18:09:35,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:09:35,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:35,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:09:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:09:35,583 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-01-06 18:09:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:35,608 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-01-06 18:09:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:09:35,609 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 18:09:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:35,622 INFO L225 Difference]: With dead ends: 62 [2021-01-06 18:09:35,622 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 18:09:35,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:09:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 18:09:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 18:09:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 18:09:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 18:09:35,668 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-01-06 18:09:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:35,669 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 18:09:35,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:09:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 18:09:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 18:09:35,670 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:35,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 18:09:35,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:09:35,671 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-01-06 18:09:35,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:35,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174640577] [2021-01-06 18:09:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:35,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174640577] [2021-01-06 18:09:35,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:35,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 18:09:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044512644] [2021-01-06 18:09:35,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 18:09:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 18:09:35,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 18:09:35,777 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2021-01-06 18:09:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:35,955 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 18:09:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 18:09:35,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 18:09:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:35,958 INFO L225 Difference]: With dead ends: 55 [2021-01-06 18:09:35,960 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 18:09:35,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 18:09:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-01-06 18:09:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 18:09:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 18:09:35,981 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2021-01-06 18:09:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:35,981 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 18:09:35,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 18:09:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 18:09:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 18:09:35,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:35,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:35,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 18:09:35,982 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-01-06 18:09:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626224666] [2021-01-06 18:09:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:36,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:36,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053416840] [2021-01-06 18:09:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 18:09:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626224666] [2021-01-06 18:09:36,207 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:36,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053416840] [2021-01-06 18:09:36,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:36,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 18:09:36,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805926625] [2021-01-06 18:09:36,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:09:36,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:09:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:36,211 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2021-01-06 18:09:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:36,384 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-01-06 18:09:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 18:09:36,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 18:09:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:36,389 INFO L225 Difference]: With dead ends: 54 [2021-01-06 18:09:36,389 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 18:09:36,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 18:09:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-01-06 18:09:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 18:09:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 18:09:36,409 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 8 [2021-01-06 18:09:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:36,409 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 18:09:36,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:09:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 18:09:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 18:09:36,410 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:36,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:36,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 18:09:36,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1265507748, now seen corresponding path program 1 times [2021-01-06 18:09:36,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:36,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906002520] [2021-01-06 18:09:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:36,644 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:36,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4732312] [2021-01-06 18:09:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 18:09:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:36,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906002520] [2021-01-06 18:09:36,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:36,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4732312] [2021-01-06 18:09:36,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:36,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 18:09:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639202125] [2021-01-06 18:09:36,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:09:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:09:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:36,848 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 5 states. [2021-01-06 18:09:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:36,998 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-01-06 18:09:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:09:36,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 18:09:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:37,000 INFO L225 Difference]: With dead ends: 62 [2021-01-06 18:09:37,000 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 18:09:37,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 18:09:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-01-06 18:09:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 18:09:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-01-06 18:09:37,009 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2021-01-06 18:09:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:37,009 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-01-06 18:09:37,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:09:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-01-06 18:09:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 18:09:37,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:37,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:37,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:37,224 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2021-01-06 18:09:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:37,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892603779] [2021-01-06 18:09:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:37,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:37,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873862022] [2021-01-06 18:09:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 18:09:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892603779] [2021-01-06 18:09:37,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:37,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873862022] [2021-01-06 18:09:37,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:37,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:09:37,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836181957] [2021-01-06 18:09:37,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:09:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:09:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:37,502 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2021-01-06 18:09:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:37,652 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-01-06 18:09:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:09:37,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 18:09:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:37,653 INFO L225 Difference]: With dead ends: 61 [2021-01-06 18:09:37,654 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 18:09:37,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 18:09:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-01-06 18:09:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 18:09:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 18:09:37,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 16 [2021-01-06 18:09:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:37,671 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 18:09:37,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:09:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 18:09:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 18:09:37,672 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:37,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 18:09:37,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:37,888 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1785416430, now seen corresponding path program 2 times [2021-01-06 18:09:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:37,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229640741] [2021-01-06 18:09:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:37,903 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:37,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899294576] [2021-01-06 18:09:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:37,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:09:37,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 18:09:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:38,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229640741] [2021-01-06 18:09:38,043 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899294576] [2021-01-06 18:09:38,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:38,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:09:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387073223] [2021-01-06 18:09:38,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:09:38,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:09:38,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:38,046 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 6 states. [2021-01-06 18:09:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:38,188 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-01-06 18:09:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:09:38,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-01-06 18:09:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:38,190 INFO L225 Difference]: With dead ends: 70 [2021-01-06 18:09:38,190 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 18:09:38,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 18:09:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-01-06 18:09:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 18:09:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-01-06 18:09:38,200 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 22 [2021-01-06 18:09:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:38,200 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-01-06 18:09:38,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:09:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-01-06 18:09:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 18:09:38,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:38,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 18:09:38,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:38,416 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2021-01-06 18:09:38,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:38,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158288934] [2021-01-06 18:09:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:38,430 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:38,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205528964] [2021-01-06 18:09:38,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:38,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:09:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 18:09:38,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158288934] [2021-01-06 18:09:38,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205528964] [2021-01-06 18:09:38,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:38,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:09:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866205203] [2021-01-06 18:09:38,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:09:38,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:09:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:09:38,616 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2021-01-06 18:09:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:38,763 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-01-06 18:09:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 18:09:38,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 18:09:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:38,764 INFO L225 Difference]: With dead ends: 67 [2021-01-06 18:09:38,764 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 18:09:38,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:09:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 18:09:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-01-06 18:09:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 18:09:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 18:09:38,774 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2021-01-06 18:09:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:38,774 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 18:09:38,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:09:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 18:09:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 18:09:38,775 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:38,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-01-06 18:09:38,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 18:09:38,990 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1706788820, now seen corresponding path program 1 times [2021-01-06 18:09:38,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:38,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408768293] [2021-01-06 18:09:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:39,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:39,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062091467] [2021-01-06 18:09:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 18:09:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:09:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408768293] [2021-01-06 18:09:39,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062091467] [2021-01-06 18:09:39,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:39,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 18:09:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225534607] [2021-01-06 18:09:39,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:09:39,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:09:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:09:39,154 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2021-01-06 18:09:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:39,297 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-01-06 18:09:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:09:39,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2021-01-06 18:09:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:39,298 INFO L225 Difference]: With dead ends: 65 [2021-01-06 18:09:39,298 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 18:09:39,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:09:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 18:09:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-01-06 18:09:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 18:09:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-01-06 18:09:39,306 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 26 [2021-01-06 18:09:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:39,307 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-01-06 18:09:39,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:09:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-01-06 18:09:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 18:09:39,308 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:39,308 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2021-01-06 18:09:39,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:39,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1822162560, now seen corresponding path program 3 times [2021-01-06 18:09:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:39,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220360709] [2021-01-06 18:09:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:39,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:39,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877163028] [2021-01-06 18:09:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:39,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 18:09:39,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:09:39,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 18:09:39,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220360709] [2021-01-06 18:09:39,694 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:39,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877163028] [2021-01-06 18:09:39,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:09:39,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 18:09:39,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198386450] [2021-01-06 18:09:39,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:09:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:39,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:09:39,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:39,696 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 5 states. [2021-01-06 18:09:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:39,750 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 18:09:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 18:09:39,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 18:09:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:39,752 INFO L225 Difference]: With dead ends: 52 [2021-01-06 18:09:39,752 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 18:09:39,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:09:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 18:09:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 18:09:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 18:09:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 18:09:39,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2021-01-06 18:09:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:39,759 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 18:09:39,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:09:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 18:09:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 18:09:39,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:39,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-01-06 18:09:39,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:39,976 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1248592163, now seen corresponding path program 3 times [2021-01-06 18:09:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:39,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321416964] [2021-01-06 18:09:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:39,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738109270] [2021-01-06 18:09:39,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:09:40,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 18:09:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:09:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 18:09:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:18,021 WARN L197 SmtUtils]: Spent 37.82 s on a formula simplification that was a NOOP. DAG size: 26 [2021-01-06 18:10:26,170 WARN L197 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 18 [2021-01-06 18:10:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 18:10:30,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321416964] [2021-01-06 18:10:30,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:30,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738109270] [2021-01-06 18:10:30,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:30,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 18:10:30,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886697196] [2021-01-06 18:10:30,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 18:10:30,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 18:10:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=59, Unknown=3, NotChecked=0, Total=90 [2021-01-06 18:10:30,724 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 10 states. [2021-01-06 18:10:47,526 WARN L197 SmtUtils]: Spent 16.79 s on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-01-06 18:12:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:12:24,548 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-01-06 18:12:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 18:12:24,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2021-01-06 18:12:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:12:24,550 INFO L225 Difference]: With dead ends: 56 [2021-01-06 18:12:24,550 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 18:12:24,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 97.6s TimeCoverageRelationStatistics Valid=47, Invalid=79, Unknown=6, NotChecked=0, Total=132 [2021-01-06 18:12:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 18:12:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 18:12:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 18:12:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 18:12:24,560 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 32 [2021-01-06 18:12:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:12:24,560 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 18:12:24,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 18:12:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 18:12:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 18:12:24,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:12:24,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-01-06 18:12:24,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 18:12:24,775 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:12:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:12:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1601348966, now seen corresponding path program 2 times [2021-01-06 18:12:24,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:12:24,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137909981] [2021-01-06 18:12:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:12:24,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:12:24,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519004096] [2021-01-06 18:12:24,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:12:24,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 18:12:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:12:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 18:12:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:12:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 18:12:25,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137909981] [2021-01-06 18:12:25,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:12:25,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519004096] [2021-01-06 18:12:25,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:12:25,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 18:12:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808079144] [2021-01-06 18:12:25,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:12:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:12:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:12:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:12:25,081 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 7 states. [2021-01-06 18:12:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:12:35,471 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-01-06 18:12:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:12:35,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-01-06 18:12:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:12:35,472 INFO L225 Difference]: With dead ends: 43 [2021-01-06 18:12:35,472 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 18:12:35,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:12:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 18:12:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-01-06 18:12:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 18:12:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 18:12:35,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-01-06 18:12:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:12:35,481 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 18:12:35,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:12:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 18:12:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 18:12:35,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:12:35,483 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:12:35,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:12:35,686 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:12:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:12:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -746038783, now seen corresponding path program 1 times [2021-01-06 18:12:35,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:12:35,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463430598] [2021-01-06 18:12:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:12:35,699 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:12:35,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541156955] [2021-01-06 18:12:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:12:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:12:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 18:12:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:12:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:12:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463430598] [2021-01-06 18:12:35,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:12:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541156955] [2021-01-06 18:12:35,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:12:35,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:12:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614210508] [2021-01-06 18:12:35,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:12:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:12:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:12:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:12:35,844 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 7 states. [2021-01-06 18:12:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:12:35,904 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 18:12:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 18:12:35,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 18:12:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:12:35,906 INFO L225 Difference]: With dead ends: 52 [2021-01-06 18:12:35,906 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 18:12:35,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 18:12:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 18:12:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 18:12:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 18:12:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 18:12:35,916 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2021-01-06 18:12:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:12:35,916 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 18:12:35,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:12:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 18:12:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 18:12:35,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:12:35,918 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:12:36,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:12:36,133 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:12:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:12:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2070175919, now seen corresponding path program 2 times [2021-01-06 18:12:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:12:36,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705656095] [2021-01-06 18:12:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:12:36,154 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:12:36,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148376747] [2021-01-06 18:12:36,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:12:36,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 18:12:36,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:12:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 18:12:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:12:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 18:12:36,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705656095] [2021-01-06 18:12:36,401 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:12:36,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148376747] [2021-01-06 18:12:36,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:12:36,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 18:12:36,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838746535] [2021-01-06 18:12:36,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:12:36,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:12:36,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:12:36,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:12:36,403 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 7 states. [2021-01-06 18:12:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:12:49,461 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 18:12:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:12:49,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-01-06 18:12:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:12:49,470 INFO L225 Difference]: With dead ends: 44 [2021-01-06 18:12:49,470 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 18:12:49,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:12:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 18:12:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 18:12:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 18:12:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 18:12:49,471 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-01-06 18:12:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:12:49,471 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 18:12:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:12:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 18:12:49,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 18:12:49,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 18:12:49,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 18:12:58,078 WARN L197 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-01-06 18:14:19,277 WARN L197 SmtUtils]: Spent 1.35 m on a formula simplification. DAG size of input: 47 DAG size of output: 37