/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/loops-crafted-1/iftelse.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:55:54,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:55:54,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:55:54,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:55:54,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:55:54,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:55:54,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:55:54,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:55:54,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:55:54,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:55:54,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:55:54,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:55:54,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:55:54,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:55:54,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:55:54,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:55:54,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:55:54,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:55:54,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:55:54,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:55:54,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:55:54,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:55:54,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:55:54,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:55:54,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:55:54,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:55:54,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:55:54,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:55:54,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:55:54,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:55:54,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:55:54,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:55:54,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:55:54,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:55:54,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:55:54,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:55:54,919 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 16:55:54,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:55:54,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:55:54,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:55:54,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:55:54,950 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:55:54,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:55:54,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:55:54,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:55:54,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:55:54,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:55:54,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:55:54,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:55:54,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:55:54,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:55:54,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:55:54,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:55:54,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:55:54,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:55:54,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:55:54,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:55:54,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:55:54,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:55:54,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:55:54,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:55:54,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:55:54,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:55:55,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:55:55,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:55:55,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:55:55,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:55:55,375 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:55:55,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-01-06 16:55:55,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a8721430/de6dc3785d1747f3a2d24b67bd99351b/FLAG1b103cc6f [2021-01-06 16:55:56,056 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:55:56,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/iftelse.c [2021-01-06 16:55:56,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a8721430/de6dc3785d1747f3a2d24b67bd99351b/FLAG1b103cc6f [2021-01-06 16:55:56,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6a8721430/de6dc3785d1747f3a2d24b67bd99351b [2021-01-06 16:55:56,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:55:56,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:55:56,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:56,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:55:56,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:55:56,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146d4787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56, skipping insertion in model container [2021-01-06 16:55:56,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:55:56,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:55:56,761 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/loops-crafted-1/iftelse.c[406,419] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:55:56,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:56,787 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:55:56,803 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/loops-crafted-1/iftelse.c[406,419] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:55:56,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:56,826 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:55:56,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56 WrapperNode [2021-01-06 16:55:56,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:56,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:56,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:55:56,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:55:56,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:56,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:55:56,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:55:56,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:55:56,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (1/1) ... [2021-01-06 16:55:56,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:55:56,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:55:56,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:55:56,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:55:56,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (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 16:55:56,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:55:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:55:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:55:57,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:55:57,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:55:57,320 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:55:57,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:57 BoogieIcfgContainer [2021-01-06 16:55:57,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:55:57,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:55:57,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:55:57,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:55:57,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:55:56" (1/3) ... [2021-01-06 16:55:57,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec821e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:57, skipping insertion in model container [2021-01-06 16:55:57,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:56" (2/3) ... [2021-01-06 16:55:57,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec821e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:57, skipping insertion in model container [2021-01-06 16:55:57,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:57" (3/3) ... [2021-01-06 16:55:57,336 INFO L111 eAbstractionObserver]: Analyzing ICFG iftelse.c [2021-01-06 16:55:57,345 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:55:57,350 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:55:57,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:55:57,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:55:57,402 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:55:57,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:55:57,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:55:57,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:55:57,403 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:55:57,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:55:57,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:55:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:55:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:55:57,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:57,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:57,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 183324244, now seen corresponding path program 1 times [2021-01-06 16:55:57,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:57,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714626950] [2021-01-06 16:55:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:58,074 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 16:55:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714626950] [2021-01-06 16:55:58,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:58,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 16:55:58,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529800614] [2021-01-06 16:55:58,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:55:58,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:58,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:55:58,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:55:58,101 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2021-01-06 16:55:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:58,343 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 16:55:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:55:58,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 16:55:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:58,355 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:55:58,355 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:55:58,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:55:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-01-06 16:55:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:55:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 16:55:58,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-01-06 16:55:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:58,399 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 16:55:58,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:55:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 16:55:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:55:58,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:58,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:58,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:55:58,401 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1453682726, now seen corresponding path program 1 times [2021-01-06 16:55:58,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:58,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072400650] [2021-01-06 16:55:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:58,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072400650] [2021-01-06 16:55:58,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:58,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:55:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872533900] [2021-01-06 16:55:58,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:58,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:58,530 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2021-01-06 16:55:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:58,549 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-01-06 16:55:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:58,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 16:55:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:58,551 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:55:58,551 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:55:58,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:55:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:55:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:55:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:55:58,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-01-06 16:55:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:58,557 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:55:58,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:55:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:55:58,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:58,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:58,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:55:58,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:58,560 INFO L82 PathProgramCache]: Analyzing trace with hash 604109513, now seen corresponding path program 1 times [2021-01-06 16:55:58,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:58,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826487743] [2021-01-06 16:55:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826487743] [2021-01-06 16:55:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320017645] [2021-01-06 16:55:58,694 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 16:55:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:55:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:58,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:58,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:55:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985430869] [2021-01-06 16:55:58,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:55:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:58,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:55:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:55:58,915 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2021-01-06 16:55:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:59,011 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-01-06 16:55:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:55:59,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 16:55:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:59,015 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:55:59,015 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:55:59,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:55:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:55:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-01-06 16:55:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:55:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:55:59,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-01-06 16:55:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:59,030 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:55:59,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:55:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:55:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:55:59,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:59,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:59,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:55:59,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash 604169095, now seen corresponding path program 1 times [2021-01-06 16:55:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:59,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843331976] [2021-01-06 16:55:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843331976] [2021-01-06 16:55:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369963493] [2021-01-06 16:55:59,553 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 16:55:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:55:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:59,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:55:59,969 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:00,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:00,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-01-06 16:56:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593714435] [2021-01-06 16:56:00,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:56:00,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:56:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:56:00,020 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2021-01-06 16:56:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:00,182 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 16:56:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:56:00,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2021-01-06 16:56:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:00,184 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:56:00,184 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:56:00,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:56:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:56:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 16:56:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:56:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:56:00,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-01-06 16:56:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:00,190 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:56:00,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:56:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:56:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:56:00,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:00,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:00,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:00,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash -518799748, now seen corresponding path program 2 times [2021-01-06 16:56:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:00,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613596770] [2021-01-06 16:56:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:00,828 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-01-06 16:56:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613596770] [2021-01-06 16:56:00,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684798850] [2021-01-06 16:56:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:00,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:00,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:00,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:56:00,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:01,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:56:01,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:01,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:01,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-01-06 16:56:01,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608202018] [2021-01-06 16:56:01,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:56:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:56:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:56:01,229 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2021-01-06 16:56:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:01,466 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-01-06 16:56:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:56:01,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 16:56:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:01,468 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:56:01,468 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:56:01,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:56:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:56:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-01-06 16:56:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:56:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 16:56:01,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-01-06 16:56:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:01,474 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 16:56:01,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:56:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 16:56:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:56:01,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:01,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:01,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:01,680 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1549527311, now seen corresponding path program 3 times [2021-01-06 16:56:01,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:01,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948652849] [2021-01-06 16:56:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948652849] [2021-01-06 16:56:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915976344] [2021-01-06 16:56:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:01,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:56:01,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:01,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:56:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:56:02,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:56:02,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 16:56:02,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773443190] [2021-01-06 16:56:02,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:56:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:56:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:56:02,017 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2021-01-06 16:56:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:02,043 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-01-06 16:56:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:56:02,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-01-06 16:56:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:02,045 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:56:02,045 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:56:02,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:56:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:56:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-01-06 16:56:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:56:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 16:56:02,051 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2021-01-06 16:56:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:02,051 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 16:56:02,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:56:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 16:56:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:56:02,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:02,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2021-01-06 16:56:02,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:02,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1549467729, now seen corresponding path program 4 times [2021-01-06 16:56:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:02,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379607574] [2021-01-06 16:56:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:02,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379607574] [2021-01-06 16:56:02,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957871081] [2021-01-06 16:56:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:02,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:56:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:56:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:02,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:56:03,003 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:03,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:03,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-06 16:56:03,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252184115] [2021-01-06 16:56:03,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:56:03,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:56:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:56:03,038 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 14 states. [2021-01-06 16:56:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:03,346 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 16:56:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:56:03,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2021-01-06 16:56:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:03,347 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:56:03,347 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:56:03,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:56:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:56:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-01-06 16:56:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:56:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 16:56:03,354 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-01-06 16:56:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:03,354 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 16:56:03,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:56:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 16:56:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:56:03,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:03,355 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1] [2021-01-06 16:56:03,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:56:03,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:03,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1283163812, now seen corresponding path program 5 times [2021-01-06 16:56:03,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:03,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084908384] [2021-01-06 16:56:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:04,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084908384] [2021-01-06 16:56:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202664642] [2021-01-06 16:56:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:04,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:56:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:56:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:04,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:56:04,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:56:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:04,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:04,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-01-06 16:56:04,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519371915] [2021-01-06 16:56:04,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:56:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:04,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:56:04,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:56:04,626 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2021-01-06 16:56:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:04,974 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-01-06 16:56:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:56:04,975 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2021-01-06 16:56:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:04,976 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:56:04,976 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:56:04,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:56:04,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:56:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 16:56:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:56:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 16:56:04,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2021-01-06 16:56:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:04,983 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 16:56:04,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:56:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 16:56:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:56:04,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:04,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 1, 1, 1, 1, 1] [2021-01-06 16:56:05,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:05,188 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 136082391, now seen corresponding path program 6 times [2021-01-06 16:56:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:05,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182464774] [2021-01-06 16:56:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182464774] [2021-01-06 16:56:05,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194770936] [2021-01-06 16:56:05,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:06,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:56:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:56:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:07,239 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-01-06 16:56:07,601 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 16:56:07,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 16:56:10,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts