/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:46:46,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:46:46,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:46:46,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:46:46,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:46:46,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:46:46,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:46:46,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:46:46,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:46:46,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:46:46,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:46:47,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:46:47,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:46:47,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:46:47,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:46:47,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:46:47,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:46:47,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:46:47,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:46:47,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:46:47,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:46:47,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:46:47,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:46:47,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:46:47,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:46:47,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:46:47,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:46:47,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:46:47,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:46:47,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:46:47,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:46:47,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:46:47,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:46:47,074 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:46:47,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:46:47,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:46:47,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:46:47,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:46:47,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:46:47,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:46:47,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:46:47,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:46:47,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:46:47,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:46:47,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:46:47,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:46:47,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:46:47,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:46:47,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:46:47,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:46:47,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:46:47,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:46:47,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:46:47,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:46:47,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:46:47,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:46:47,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:46:47,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:46:47,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:46:47,508 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:46:47,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-01-06 17:46:47,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da7ae9366/30f7a67130ea4b04816ad378a66c761b/FLAGae634890a [2021-01-06 17:46:48,197 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:46:48,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2021-01-06 17:46:48,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da7ae9366/30f7a67130ea4b04816ad378a66c761b/FLAGae634890a [2021-01-06 17:46:48,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da7ae9366/30f7a67130ea4b04816ad378a66c761b [2021-01-06 17:46:48,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:46:48,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:46:48,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:46:48,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:46:48,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:46:48,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93ddaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48, skipping insertion in model container [2021-01-06 17:46:48,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:46:48,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:46:48,818 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/hard-ll_valuebound100.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:46:48,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:46:48,849 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:46:48,863 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/hard-ll_valuebound100.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:46:48,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:46:48,890 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:46:48,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48 WrapperNode [2021-01-06 17:46:48,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:46:48,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:46:48,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:46:48,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:46:48,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:46:48,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:46:48,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:46:48,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:46:48,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... [2021-01-06 17:46:48,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:46:48,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:46:48,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:46:48,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:46:48,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:46:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:46:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:46:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:46:49,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:46:49,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:46:49,516 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-01-06 17:46:49,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:46:49 BoogieIcfgContainer [2021-01-06 17:46:49,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:46:49,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:46:49,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:46:49,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:46:49,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:46:48" (1/3) ... [2021-01-06 17:46:49,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5eed83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:46:49, skipping insertion in model container [2021-01-06 17:46:49,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:46:48" (2/3) ... [2021-01-06 17:46:49,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5eed83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:46:49, skipping insertion in model container [2021-01-06 17:46:49,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:46:49" (3/3) ... [2021-01-06 17:46:49,530 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2021-01-06 17:46:49,537 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:46:49,542 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-01-06 17:46:49,562 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-01-06 17:46:49,591 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:46:49,591 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:46:49,591 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:46:49,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:46:49,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:46:49,592 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:46:49,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:46:49,592 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:46:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-01-06 17:46:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:46:49,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:49,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:49,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-01-06 17:46:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:49,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885563789] [2021-01-06 17:46:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:49,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885563789] [2021-01-06 17:46:49,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:46:49,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:46:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606348752] [2021-01-06 17:46:49,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:46:49,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:46:49,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:46:49,827 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2021-01-06 17:46:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:49,853 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2021-01-06 17:46:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:46:49,855 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:46:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:49,864 INFO L225 Difference]: With dead ends: 83 [2021-01-06 17:46:49,864 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:46:49,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:46:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:46:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 17:46:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:46:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 17:46:49,905 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2021-01-06 17:46:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:49,906 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 17:46:49,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:46:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 17:46:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:46:49,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:49,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:49,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:46:49,908 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-01-06 17:46:49,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:49,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817604017] [2021-01-06 17:46:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:50,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817604017] [2021-01-06 17:46:50,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:46:50,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:46:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558611579] [2021-01-06 17:46:50,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:46:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:46:50,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:46:50,006 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2021-01-06 17:46:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:50,099 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-01-06 17:46:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:46:50,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:46:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:50,101 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:46:50,101 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:46:50,102 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 17:46:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:46:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-01-06 17:46:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:46:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 17:46:50,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2021-01-06 17:46:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:50,112 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 17:46:50,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:46:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 17:46:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:46:50,113 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:50,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:50,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:46:50,113 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1277171076, now seen corresponding path program 1 times [2021-01-06 17:46:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:50,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760133150] [2021-01-06 17:46:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:50,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760133150] [2021-01-06 17:46:50,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:46:50,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:46:50,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751156138] [2021-01-06 17:46:50,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:46:50,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:46:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:46:50,216 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2021-01-06 17:46:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:50,366 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-01-06 17:46:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:46:50,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 17:46:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:50,371 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:46:50,371 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:46:50,372 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 17:46:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:46:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-01-06 17:46:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:46:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-01-06 17:46:50,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 13 [2021-01-06 17:46:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:50,393 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-01-06 17:46:50,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:46:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-01-06 17:46:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:46:50,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:50,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:50,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:46:50,397 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash 999399167, now seen corresponding path program 1 times [2021-01-06 17:46:50,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:50,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195019116] [2021-01-06 17:46:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:50,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:50,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129646395] [2021-01-06 17:46:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:50,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:46:50,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:50,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195019116] [2021-01-06 17:46:50,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:50,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129646395] [2021-01-06 17:46:50,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:46:50,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:46:50,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376642836] [2021-01-06 17:46:50,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:46:50,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:46:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:46:50,631 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 6 states. [2021-01-06 17:46:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:50,789 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-01-06 17:46:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:46:50,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 17:46:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:50,791 INFO L225 Difference]: With dead ends: 76 [2021-01-06 17:46:50,791 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:46:50,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 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 17:46:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:46:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-01-06 17:46:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 17:46:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-01-06 17:46:50,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 15 [2021-01-06 17:46:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:50,805 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-01-06 17:46:50,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:46:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-01-06 17:46:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:46:50,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:50,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:51,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:51,020 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash 392223696, now seen corresponding path program 1 times [2021-01-06 17:46:51,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:51,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302570024] [2021-01-06 17:46:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:51,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:51,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939689114] [2021-01-06 17:46:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:46:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:51,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302570024] [2021-01-06 17:46:51,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:51,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939689114] [2021-01-06 17:46:51,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:46:51,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:46:51,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294017526] [2021-01-06 17:46:51,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:46:51,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:51,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:46:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:46:51,336 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 9 states. [2021-01-06 17:46:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:51,623 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-01-06 17:46:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:46:51,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2021-01-06 17:46:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:51,625 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:46:51,625 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:46:51,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:46:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:46:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-01-06 17:46:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 17:46:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-01-06 17:46:51,635 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 18 [2021-01-06 17:46:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:51,635 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-01-06 17:46:51,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:46:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-01-06 17:46:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:46:51,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:51,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:51,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:51,851 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 434992196, now seen corresponding path program 1 times [2021-01-06 17:46:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:51,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790241289] [2021-01-06 17:46:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:51,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:51,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200967388] [2021-01-06 17:46:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:46:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:52,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790241289] [2021-01-06 17:46:52,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:52,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200967388] [2021-01-06 17:46:52,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:46:52,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:46:52,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758467668] [2021-01-06 17:46:52,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:46:52,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:46:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:46:52,115 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 9 states. [2021-01-06 17:46:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:52,562 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-01-06 17:46:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:46:52,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 17:46:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:52,564 INFO L225 Difference]: With dead ends: 102 [2021-01-06 17:46:52,565 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:46:52,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:46:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:46:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-01-06 17:46:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 17:46:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-01-06 17:46:52,596 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 22 [2021-01-06 17:46:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:52,596 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-01-06 17:46:52,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:46:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-01-06 17:46:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:46:52,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:52,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:52,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:52,813 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash -919005345, now seen corresponding path program 2 times [2021-01-06 17:46:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:52,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108531888] [2021-01-06 17:46:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:52,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:52,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253708893] [2021-01-06 17:46:52,830 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 17:46:52,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:46:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:46:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:46:52,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:53,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108531888] [2021-01-06 17:46:53,378 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:53,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253708893] [2021-01-06 17:46:53,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:46:53,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:46:53,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234260349] [2021-01-06 17:46:53,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:46:53,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:46:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:46:53,381 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 12 states. [2021-01-06 17:46:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:54,414 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2021-01-06 17:46:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:46:54,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2021-01-06 17:46:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:54,420 INFO L225 Difference]: With dead ends: 127 [2021-01-06 17:46:54,420 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:46:54,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:46:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:46:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-01-06 17:46:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 17:46:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2021-01-06 17:46:54,459 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 29 [2021-01-06 17:46:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:54,460 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2021-01-06 17:46:54,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:46:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2021-01-06 17:46:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:46:54,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:54,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:54,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:54,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -36466664, now seen corresponding path program 1 times [2021-01-06 17:46:54,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:54,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323134929] [2021-01-06 17:46:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:54,676 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:54,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503252066] [2021-01-06 17:46:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:46:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:55,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323134929] [2021-01-06 17:46:55,044 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:55,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503252066] [2021-01-06 17:46:55,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:46:55,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:46:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689737919] [2021-01-06 17:46:55,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:46:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:46:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:46:55,047 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand 10 states. [2021-01-06 17:46:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:55,729 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2021-01-06 17:46:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:46:55,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-01-06 17:46:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:55,731 INFO L225 Difference]: With dead ends: 125 [2021-01-06 17:46:55,731 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 17:46:55,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:46:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 17:46:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2021-01-06 17:46:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 17:46:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-01-06 17:46:55,748 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 31 [2021-01-06 17:46:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:55,748 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-01-06 17:46:55,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:46:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-01-06 17:46:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:46:55,750 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:55,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:55,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:55,965 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:55,966 INFO L82 PathProgramCache]: Analyzing trace with hash -684568005, now seen corresponding path program 1 times [2021-01-06 17:46:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:55,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689763495] [2021-01-06 17:46:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:55,984 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:55,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659010976] [2021-01-06 17:46:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:46:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:46:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:46:56,251 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:46:56,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:46:56,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:46:56,281 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:46:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:46:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689763495] [2021-01-06 17:46:56,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:46:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659010976] [2021-01-06 17:46:56,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:46:56,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:46:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356367016] [2021-01-06 17:46:56,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:46:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:46:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:46:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:46:56,612 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 12 states. [2021-01-06 17:46:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:46:57,658 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2021-01-06 17:46:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:46:57,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2021-01-06 17:46:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:46:57,660 INFO L225 Difference]: With dead ends: 131 [2021-01-06 17:46:57,660 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:46:57,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:46:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:46:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-01-06 17:46:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 17:46:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-01-06 17:46:57,675 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 33 [2021-01-06 17:46:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:46:57,675 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-01-06 17:46:57,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:46:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-01-06 17:46:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:46:57,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:46:57,677 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:46:57,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:46:57,891 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:46:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:46:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1277177884, now seen corresponding path program 3 times [2021-01-06 17:46:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:46:57,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065178200] [2021-01-06 17:46:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:46:57,906 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:46:57,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978942135] [2021-01-06 17:46:57,907 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 17:46:57,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:46:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:46:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:46:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:47:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:47:00,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065178200] [2021-01-06 17:47:00,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:47:00,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978942135] [2021-01-06 17:47:00,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:47:00,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:47:00,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386412732] [2021-01-06 17:47:00,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:47:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:47:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:47:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2021-01-06 17:47:00,709 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 9 states. [2021-01-06 17:48:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:01,022 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-01-06 17:48:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:48:01,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-01-06 17:48:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:01,024 INFO L225 Difference]: With dead ends: 108 [2021-01-06 17:48:01,024 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 17:48:01,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=40, Invalid=88, Unknown=4, NotChecked=0, Total=132 [2021-01-06 17:48:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 17:48:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-01-06 17:48:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 17:48:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-01-06 17:48:01,048 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 36 [2021-01-06 17:48:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:01,049 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-01-06 17:48:01,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:48:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-01-06 17:48:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:48:01,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:01,052 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:01,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:48:01,253 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -642892963, now seen corresponding path program 2 times [2021-01-06 17:48:01,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:01,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049046771] [2021-01-06 17:48:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:01,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:01,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615529460] [2021-01-06 17:48:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:01,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:48:01,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:48:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 17:48:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:48:01,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049046771] [2021-01-06 17:48:01,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:01,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615529460] [2021-01-06 17:48:01,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:48:01,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:48:01,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980261761] [2021-01-06 17:48:01,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:48:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:48:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:48:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:48:01,914 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 12 states. [2021-01-06 17:48:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:02,946 INFO L93 Difference]: Finished difference Result 147 states and 170 transitions. [2021-01-06 17:48:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:48:02,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2021-01-06 17:48:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:02,948 INFO L225 Difference]: With dead ends: 147 [2021-01-06 17:48:02,948 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 17:48:02,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:48:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 17:48:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2021-01-06 17:48:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 17:48:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2021-01-06 17:48:02,961 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 38 [2021-01-06 17:48:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:02,961 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2021-01-06 17:48:02,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:48:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2021-01-06 17:48:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:48:02,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:02,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:03,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 17:48:03,179 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:03,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1707275894, now seen corresponding path program 3 times [2021-01-06 17:48:03,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:03,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967157104] [2021-01-06 17:48:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:03,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:03,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489278184] [2021-01-06 17:48:03,192 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:03,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:48:03,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:48:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:48:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:48:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967157104] [2021-01-06 17:48:03,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:03,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489278184] [2021-01-06 17:48:03,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:48:03,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 17:48:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88427156] [2021-01-06 17:48:03,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:48:03,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:48:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:48:03,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:48:03,917 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 14 states. [2021-01-06 17:48:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:05,366 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2021-01-06 17:48:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:48:05,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2021-01-06 17:48:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:05,368 INFO L225 Difference]: With dead ends: 146 [2021-01-06 17:48:05,368 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 17:48:05,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:48:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 17:48:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2021-01-06 17:48:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 17:48:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-01-06 17:48:05,381 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 44 [2021-01-06 17:48:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:05,381 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-01-06 17:48:05,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:48:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-01-06 17:48:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:48:05,383 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:05,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:05,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:05,598 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:05,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2100302904, now seen corresponding path program 1 times [2021-01-06 17:48:05,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:05,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921051012] [2021-01-06 17:48:05,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:05,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:05,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180314999] [2021-01-06 17:48:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:48:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:48:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:05,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:48:05,757 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:48:05,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:48:05,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:48:05,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:48:05,776 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:48:05,789 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 17:48:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:48:05,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921051012] [2021-01-06 17:48:05,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:05,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180314999] [2021-01-06 17:48:05,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:48:05,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:48:05,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688692208] [2021-01-06 17:48:05,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:48:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:48:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:48:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:48:05,848 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand 5 states. [2021-01-06 17:48:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:05,951 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2021-01-06 17:48:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:48:05,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-01-06 17:48:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:05,953 INFO L225 Difference]: With dead ends: 130 [2021-01-06 17:48:05,953 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 17:48:05,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 17:48:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 17:48:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-01-06 17:48:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 17:48:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-01-06 17:48:05,965 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 44 [2021-01-06 17:48:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:05,965 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-01-06 17:48:05,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:48:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-01-06 17:48:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:48:05,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:05,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:06,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:06,182 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1027491960, now seen corresponding path program 4 times [2021-01-06 17:48:06,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:06,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458754225] [2021-01-06 17:48:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:06,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:06,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593086203] [2021-01-06 17:48:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:06,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:48:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:48:06,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 17:48:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:48:07,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458754225] [2021-01-06 17:48:07,063 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:07,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593086203] [2021-01-06 17:48:07,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:48:07,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:48:07,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787523966] [2021-01-06 17:48:07,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:48:07,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:48:07,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:48:07,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:48:07,065 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 15 states. [2021-01-06 17:48:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:08,762 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2021-01-06 17:48:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:48:08,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2021-01-06 17:48:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:08,764 INFO L225 Difference]: With dead ends: 126 [2021-01-06 17:48:08,765 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 17:48:08,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:48:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 17:48:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-01-06 17:48:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 17:48:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-01-06 17:48:08,781 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 45 [2021-01-06 17:48:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:08,781 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-01-06 17:48:08,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:48:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-01-06 17:48:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:48:08,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:08,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:08,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:48:08,997 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash -14469331, now seen corresponding path program 2 times [2021-01-06 17:48:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:08,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889978087] [2021-01-06 17:48:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:09,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:09,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33201011] [2021-01-06 17:48:09,015 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:09,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:48:09,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:48:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:48:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:48:09,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889978087] [2021-01-06 17:48:09,701 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:09,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33201011] [2021-01-06 17:48:09,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:48:09,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 17:48:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811475326] [2021-01-06 17:48:09,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:48:09,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:48:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:48:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:48:09,704 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 16 states. [2021-01-06 17:48:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:48:10,988 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2021-01-06 17:48:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:48:10,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2021-01-06 17:48:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:48:10,990 INFO L225 Difference]: With dead ends: 126 [2021-01-06 17:48:10,990 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 17:48:10,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:48:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 17:48:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-01-06 17:48:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 17:48:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-01-06 17:48:11,003 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 46 [2021-01-06 17:48:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:48:11,003 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-01-06 17:48:11,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:48:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-01-06 17:48:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 17:48:11,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:48:11,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:48:11,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:48:11,218 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:48:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:48:11,218 INFO L82 PathProgramCache]: Analyzing trace with hash -422546789, now seen corresponding path program 3 times [2021-01-06 17:48:11,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:48:11,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676342295] [2021-01-06 17:48:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:48:11,229 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:48:11,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053445575] [2021-01-06 17:48:11,229 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:48:11,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:48:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:48:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:48:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:48:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676342295] [2021-01-06 17:48:11,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:48:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053445575] [2021-01-06 17:48:11,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:48:11,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:48:11,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:48:11,673 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:48:11,673 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:48:11,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:48:11,920 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:48:11,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:48:11 BoogieIcfgContainer [2021-01-06 17:48:11,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:48:11,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:48:11,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:48:11,922 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:48:11,923 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:46:49" (3/4) ... [2021-01-06 17:48:11,927 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:48:11,927 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:48:11,929 INFO L168 Benchmark]: Toolchain (without parser) took 83361.48 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 126.2 MB in the beginning and 89.4 MB in the end (delta: 36.8 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,931 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 122.9 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:48:11,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.44 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,933 INFO L168 Benchmark]: Boogie Preprocessor took 29.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 113.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,937 INFO L168 Benchmark]: RCFGBuilder took 552.98 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 130.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,941 INFO L168 Benchmark]: TraceAbstraction took 82401.77 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 129.7 MB in the beginning and 90.0 MB in the end (delta: 39.8 MB). Peak memory consumption was 109.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:48:11,941 INFO L168 Benchmark]: Witness Printer took 4.96 ms. Allocated memory is still 219.2 MB. Free memory was 90.0 MB in the beginning and 89.4 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:48:11,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 122.9 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 321.44 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.99 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 113.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 552.98 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 130.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82401.77 ms. Allocated memory was 151.0 MB in the beginning and 219.2 MB in the end (delta: 68.2 MB). Free memory was 129.7 MB in the beginning and 90.0 MB in the end (delta: 39.8 MB). Peak memory consumption was 109.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.96 ms. Allocated memory is still 219.2 MB. Free memory was 90.0 MB in the beginning and 89.4 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L12] COND FALSE !(!cond) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L40] COND TRUE !(r >= d) [L46] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 82.3s, OverallIterations: 16, TraceHistogramMax: 4, AutomataDifference: 69.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 416 SDtfs, 1398 SDslu, 1239 SDs, 0 SdLazy, 2647 SolverSat, 522 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 50.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 501 GetRequests, 290 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 23.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 131 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 436 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 421 ConstructedInterpolants, 0 QuantifiedInterpolants, 219146 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1494 ConjunctsInSsa, 412 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 55/248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...