/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:54:14,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:54:14,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:54:14,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:54:14,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:54:14,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:54:14,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:54:14,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:54:14,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:54:14,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:54:14,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:54:14,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:54:14,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:54:14,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:54:14,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:54:14,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:54:14,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:54:14,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:54:14,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:54:14,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:54:14,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:54:14,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:54:14,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:54:14,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:54:14,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:54:14,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:54:14,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:54:14,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:54:14,974 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 16:54:15,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:54:15,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:54:15,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:54:15,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:54:15,039 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:54:15,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:54:15,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:54:15,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:54:15,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:54:15,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:54:15,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:54:15,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:54:15,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:54:15,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:54:15,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:54:15,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:54:15,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:54:15,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:54:15,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:54:15,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:54:15,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:54:15,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:54:15,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:54:15,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:54:15,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:54:15,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:54:15,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:54:15,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:54:15,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:54:15,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:54:15,553 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:54:15,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2021-01-06 16:54:15,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328e150c8/666657def2e24ffcb001d87a3e1008c9/FLAG819a13239 [2021-01-06 16:54:16,504 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:54:16,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2021-01-06 16:54:16,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328e150c8/666657def2e24ffcb001d87a3e1008c9/FLAG819a13239 [2021-01-06 16:54:16,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/328e150c8/666657def2e24ffcb001d87a3e1008c9 [2021-01-06 16:54:16,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:54:16,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:54:16,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:54:16,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:54:16,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:54:16,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:54:16" (1/1) ... [2021-01-06 16:54:16,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb7e0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:16, skipping insertion in model container [2021-01-06 16:54:16,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:54:16" (1/1) ... [2021-01-06 16:54:16,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:54:16,848 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__Id_MCDC_112~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89__Id_MCDC_88~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_93~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__Id_MCDC_92~0,] [2021-01-06 16:54:17,238 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89__Id_MCDC_96~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_1~0,] [2021-01-06 16:54:17,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:54:17,292 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__Id_MCDC_112~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89__Id_MCDC_88~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_93~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__Id_MCDC_92~0,] [2021-01-06 16:54:17,426 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89__Id_MCDC_96~0,] left hand side expression in assignment: lhs: VariableLHS[~Id_MCDC_89____CPAchecker_TMP_1~0,] [2021-01-06 16:54:17,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:54:17,487 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:54:17,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17 WrapperNode [2021-01-06 16:54:17,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:54:17,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:54:17,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:54:17,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:54:17,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:54:17,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:54:17,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:54:17,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:54:17,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (1/1) ... [2021-01-06 16:54:17,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:54:17,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:54:17,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:54:17,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:54:17,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (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 16:54:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 16:54:17,894 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-01-06 16:54:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:54:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:54:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:54:17,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:54:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:54:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:54:18,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:54:18,869 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:54:18,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:54:18 BoogieIcfgContainer [2021-01-06 16:54:18,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:54:18,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:54:18,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:54:18,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:54:18,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:54:16" (1/3) ... [2021-01-06 16:54:18,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8756ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:54:18, skipping insertion in model container [2021-01-06 16:54:18,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:54:17" (2/3) ... [2021-01-06 16:54:18,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8756ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:54:18, skipping insertion in model container [2021-01-06 16:54:18,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:54:18" (3/3) ... [2021-01-06 16:54:18,883 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2021-01-06 16:54:18,891 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:54:18,897 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:54:18,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:54:18,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:54:18,953 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:54:18,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:54:18,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:54:18,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:54:18,954 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:54:18,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:54:18,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:54:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-01-06 16:54:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:54:18,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:18,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:18,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:18,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1180906794, now seen corresponding path program 1 times [2021-01-06 16:54:19,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:19,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448287367] [2021-01-06 16:54:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:19,477 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 16:54:19,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448287367] [2021-01-06 16:54:19,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:54:19,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:54:19,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651821232] [2021-01-06 16:54:19,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:54:19,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:54:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:54:19,515 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2021-01-06 16:54:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:19,618 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-01-06 16:54:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:54:19,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 16:54:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:19,654 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:54:19,654 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:54:19,658 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 16:54:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:54:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-01-06 16:54:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:54:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:54:19,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-01-06 16:54:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:19,706 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:54:19,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:54:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:54:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:54:19,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:19,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:19,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:54:19,712 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1181383450, now seen corresponding path program 1 times [2021-01-06 16:54:19,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:19,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608486340] [2021-01-06 16:54:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:19,910 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 16:54:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608486340] [2021-01-06 16:54:19,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:54:19,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:54:19,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083768908] [2021-01-06 16:54:19,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:54:19,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:19,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:54:19,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:54:19,915 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2021-01-06 16:54:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:19,962 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-01-06 16:54:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:54:19,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 16:54:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:19,963 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:54:19,964 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:54:19,965 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 16:54:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:54:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-01-06 16:54:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:54:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:54:19,971 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2021-01-06 16:54:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:19,971 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:54:19,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:54:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:54:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:54:19,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:19,973 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:19,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:54:19,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash -181774814, now seen corresponding path program 1 times [2021-01-06 16:54:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098280064] [2021-01-06 16:54:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:20,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098280064] [2021-01-06 16:54:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589348093] [2021-01-06 16:54:20,161 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 16:54:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:54:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:20,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:20,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:54:20,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049976947] [2021-01-06 16:54:20,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:54:20,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:54:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:54:20,546 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2021-01-06 16:54:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:20,720 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-06 16:54:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:54:20,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 16:54:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:20,722 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:54:20,722 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:54:20,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:54:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:54:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-01-06 16:54:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:54:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 16:54:20,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2021-01-06 16:54:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:20,731 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 16:54:20,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:54:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 16:54:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:54:20,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:20,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:20,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:54:20,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash -192165078, now seen corresponding path program 2 times [2021-01-06 16:54:20,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:20,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329899965] [2021-01-06 16:54:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:21,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329899965] [2021-01-06 16:54:21,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083529415] [2021-01-06 16:54:21,103 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 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 16:54:21,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:54:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:21,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:21,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:54:21,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994877538] [2021-01-06 16:54:21,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:54:21,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:54:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:54:21,448 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2021-01-06 16:54:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:21,640 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-01-06 16:54:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:54:21,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 16:54:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:21,642 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:54:21,642 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:54:21,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:54:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:54:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-01-06 16:54:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:54:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 16:54:21,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-01-06 16:54:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:21,651 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 16:54:21,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:54:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 16:54:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:54:21,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:21,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:21,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:21,870 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash 125000242, now seen corresponding path program 3 times [2021-01-06 16:54:21,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:21,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326613880] [2021-01-06 16:54:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:22,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326613880] [2021-01-06 16:54:22,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593154374] [2021-01-06 16:54:22,045 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 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 16:54:24,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:54:24,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:54:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:24,515 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:54:24,516 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 16:54:24,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 16:54:24,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:54:24,533 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:54:24,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:18 [2021-01-06 16:54:24,593 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:54:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:54:24,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:24,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-01-06 16:54:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038662759] [2021-01-06 16:54:24,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:54:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:54:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:54:24,715 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2021-01-06 16:54:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:25,719 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-01-06 16:54:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:54:25,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2021-01-06 16:54:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:25,720 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:54:25,720 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:54:25,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:54:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:54:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:54:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:54:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:54:25,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-01-06 16:54:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:25,724 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:54:25,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:54:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:54:25,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:54:25,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:25,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:54:26,193 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-01-06 16:54:26,314 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-01-06 16:54:26,318 INFO L189 CegarLoopUtils]: For program point L161(lines 161 224) no Hoare annotation was computed. [2021-01-06 16:54:26,318 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:54:26,319 INFO L192 CegarLoopUtils]: At program point L221(lines 133 225) the Hoare annotation is: true [2021-01-06 16:54:26,319 INFO L189 CegarLoopUtils]: For program point L182(lines 182 217) no Hoare annotation was computed. [2021-01-06 16:54:26,319 INFO L189 CegarLoopUtils]: For program point L180(lines 180 222) no Hoare annotation was computed. [2021-01-06 16:54:26,319 INFO L189 CegarLoopUtils]: For program point L199(lines 199 209) no Hoare annotation was computed. [2021-01-06 16:54:26,319 INFO L189 CegarLoopUtils]: For program point L193(line 193) no Hoare annotation was computed. [2021-01-06 16:54:26,320 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:54:26,320 INFO L189 CegarLoopUtils]: For program point L191(lines 191 210) no Hoare annotation was computed. [2021-01-06 16:54:26,320 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:54:26,320 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:54:26,320 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 193) no Hoare annotation was computed. [2021-01-06 16:54:26,321 INFO L185 CegarLoopUtils]: At program point L216(lines 182 217) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~Id_MCDC_89____CPAchecker_TMP_1~0 1)) (.cse1 (= ~Id_MCDC_93~0 ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0)) (.cse2 (= (select (select |#memory_int| |ULTIMATE.start_main_~#Id_MCDC_89__Id_MCDC_95~0.base|) (+ |ULTIMATE.start_main_~#Id_MCDC_89__Id_MCDC_95~0.offset| 492)) 0))) (or (and .cse0 .cse1 .cse2 (< (mod (+ ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0 4294967295) 4294967296) 42) (< (mod ~Id_MCDC_93~0 4294967296) 42)) (and .cse0 .cse1 .cse2 (< 0 (+ (div ~Id_MCDC_93~0 4294967296) 1)) (<= ~Id_MCDC_93~0 2)))) [2021-01-06 16:54:26,321 INFO L185 CegarLoopUtils]: At program point L204(lines 167 223) the Hoare annotation is: (let ((.cse1 (= (select (select |#memory_int| |ULTIMATE.start_main_~#Id_MCDC_89__Id_MCDC_95~0.base|) (+ |ULTIMATE.start_main_~#Id_MCDC_89__Id_MCDC_95~0.offset| 492)) 0))) (or (let ((.cse2 (mod (+ ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0 4294967295) 4294967296)) (.cse0 (mod (+ ~Id_MCDC_93~0 4294967295) 4294967296))) (and (< .cse0 42) .cse1 (< .cse2 42) (not (= (* .cse2 12) 492)) (not (= 492 (* .cse0 12))))) (and (= ~Id_MCDC_93~0 0) (= ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0 0) .cse1) (and (<= 1 ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0) .cse1 (< 0 (+ (div ~Id_MCDC_93~0 4294967296) 1)) (<= ~Id_MCDC_93~0 2) (<= ULTIMATE.start_main_~Id_MCDC_89__Id_MCDC_96~0 1)))) [2021-01-06 16:54:26,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:54:26 BoogieIcfgContainer [2021-01-06 16:54:26,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:54:26,352 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:54:26,352 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:54:26,352 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:54:26,353 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:54:18" (3/4) ... [2021-01-06 16:54:26,359 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:54:26,380 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-01-06 16:54:26,381 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:54:26,383 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-01-06 16:54:26,384 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:54:26,385 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:54:26,648 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c-witness.graphml [2021-01-06 16:54:26,648 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:54:26,650 INFO L168 Benchmark]: Toolchain (without parser) took 9879.76 ms. Allocated memory was 154.1 MB in the beginning and 203.4 MB in the end (delta: 49.3 MB). Free memory was 129.3 MB in the beginning and 73.2 MB in the end (delta: 56.1 MB). Peak memory consumption was 105.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,650 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 154.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:54:26,651 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.31 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 113.3 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,651 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.33 ms. Allocated memory is still 154.1 MB. Free memory was 113.3 MB in the beginning and 110.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,652 INFO L168 Benchmark]: Boogie Preprocessor took 93.43 ms. Allocated memory is still 154.1 MB. Free memory was 110.0 MB in the beginning and 106.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,652 INFO L168 Benchmark]: RCFGBuilder took 1182.01 ms. Allocated memory is still 154.1 MB. Free memory was 106.9 MB in the beginning and 67.2 MB in the end (delta: 39.7 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,652 INFO L168 Benchmark]: TraceAbstraction took 7477.55 ms. Allocated memory was 154.1 MB in the beginning and 203.4 MB in the end (delta: 49.3 MB). Free memory was 67.2 MB in the beginning and 137.0 MB in the end (delta: -69.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:54:26,653 INFO L168 Benchmark]: Witness Printer took 296.61 ms. Allocated memory is still 203.4 MB. Free memory was 137.0 MB in the beginning and 73.2 MB in the end (delta: 63.8 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:54:26,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 154.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 717.31 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 113.3 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 98.33 ms. Allocated memory is still 154.1 MB. Free memory was 113.3 MB in the beginning and 110.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.43 ms. Allocated memory is still 154.1 MB. Free memory was 110.0 MB in the beginning and 106.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1182.01 ms. Allocated memory is still 154.1 MB. Free memory was 106.9 MB in the beginning and 67.2 MB in the end (delta: 39.7 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7477.55 ms. Allocated memory was 154.1 MB in the beginning and 203.4 MB in the end (delta: 49.3 MB). Free memory was 67.2 MB in the beginning and 137.0 MB in the end (delta: -69.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 296.61 ms. Allocated memory is still 203.4 MB. Free memory was 137.0 MB in the beginning and 73.2 MB in the end (delta: 63.8 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 193]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 167]: Loop Invariant Derived loop invariant: ((((((Id_MCDC_93 + 4294967295) % 4294967296 < 42 && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) && (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 < 42) && !((Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 * 12 == 492)) && !(492 == (Id_MCDC_93 + 4294967295) % 4294967296 * 12)) || ((Id_MCDC_93 == 0 && Id_MCDC_89__Id_MCDC_96 == 0) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0)) || ((((1 <= Id_MCDC_89__Id_MCDC_96 && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) && 0 < Id_MCDC_93 / 4294967296 + 1) && Id_MCDC_93 <= 2) && Id_MCDC_89__Id_MCDC_96 <= 1) - InvariantResult [Line: 133]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 182]: Loop Invariant Derived loop invariant: ((((Id_MCDC_89____CPAchecker_TMP_1 == 1 && Id_MCDC_93 == Id_MCDC_89__Id_MCDC_96) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) && (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 < 42) && Id_MCDC_93 % 4294967296 < 42) || ((((Id_MCDC_89____CPAchecker_TMP_1 == 1 && Id_MCDC_93 == Id_MCDC_89__Id_MCDC_96) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) && 0 < Id_MCDC_93 / 4294967296 + 1) && Id_MCDC_93 <= 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 140 SDslu, 126 SDs, 0 SdLazy, 206 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 17 NumberOfFragments, 143 HoareAnnotationTreeSize, 3 FomulaSimplifications, 742 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 229 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 144 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 15344 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1217 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 40/108 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 proved your program to be correct! Received shutdown request...