/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/bitvector/byte_add_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:29:34,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:29:34,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:29:35,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:29:35,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:29:35,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:29:35,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:29:35,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:29:35,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:29:35,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:29:35,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:29:35,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:29:35,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:29:35,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:29:35,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:29:35,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:29:35,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:29:35,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:29:35,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:29:35,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:29:35,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:29:35,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:29:35,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:29:35,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:29:35,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 11:29:35,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 11:29:35,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 11:29:35,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 11:29:35,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 11:29:35,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 11:29:35,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:29:35,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:29:35,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:29:35,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:29:35,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:29:35,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:29:35,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:29:35,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:29:35,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:29:35,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:29:35,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:29:35,095 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 11:29:35,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:29:35,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:29:35,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:29:35,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:29:35,155 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:29:35,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:29:35,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:29:35,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:29:35,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:29:35,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:29:35,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:29:35,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:29:35,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:29:35,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:29:35,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:29:35,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:29:35,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:29:35,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:29:35,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:29:35,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:29:35,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:29:35,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:29:35,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:29:35,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:29:35,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:29:35,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:29:35,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:29:35,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:29:35,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:29:35,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:29:35,791 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:29:35,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-01-06 11:29:35,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1f6d3204/c023758226454807bb4ce71350252509/FLAG926cc0762 [2021-01-06 11:29:36,742 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:29:36,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-01-06 11:29:36,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1f6d3204/c023758226454807bb4ce71350252509/FLAG926cc0762 [2021-01-06 11:29:37,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c1f6d3204/c023758226454807bb4ce71350252509 [2021-01-06 11:29:37,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:29:37,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:29:37,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:29:37,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:29:37,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:29:37,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8a96f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37, skipping insertion in model container [2021-01-06 11:29:37,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:29:37,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:29:37,337 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/bitvector/byte_add_1-1.i[863,876] left hand side expression in assignment: lhs: VariableLHS[~a0~0,] left hand side expression in assignment: lhs: VariableLHS[~a1~0,] left hand side expression in assignment: lhs: VariableLHS[~a2~0,] left hand side expression in assignment: lhs: VariableLHS[~a3~0,] left hand side expression in assignment: lhs: VariableLHS[~b0~0,] left hand side expression in assignment: lhs: VariableLHS[~b1~0,] left hand side expression in assignment: lhs: VariableLHS[~b2~0,] left hand side expression in assignment: lhs: VariableLHS[~b3~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~r0~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,] left hand side expression in assignment: lhs: VariableLHS[~r2~0,] left hand side expression in assignment: lhs: VariableLHS[~r3~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~r0~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,] left hand side expression in assignment: lhs: VariableLHS[~r2~0,] left hand side expression in assignment: lhs: VariableLHS[~r3~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~r~1,] [2021-01-06 11:29:37,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:29:37,435 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:29:37,452 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/bitvector/byte_add_1-1.i[863,876] left hand side expression in assignment: lhs: VariableLHS[~a0~0,] left hand side expression in assignment: lhs: VariableLHS[~a1~0,] left hand side expression in assignment: lhs: VariableLHS[~a2~0,] left hand side expression in assignment: lhs: VariableLHS[~a3~0,] left hand side expression in assignment: lhs: VariableLHS[~b0~0,] left hand side expression in assignment: lhs: VariableLHS[~b1~0,] left hand side expression in assignment: lhs: VariableLHS[~b2~0,] left hand side expression in assignment: lhs: VariableLHS[~b3~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~na~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~nb~0,] left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] left hand side expression in assignment: lhs: VariableLHS[~partial_sum~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~carry~0,] left hand side expression in assignment: lhs: VariableLHS[~r0~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,] left hand side expression in assignment: lhs: VariableLHS[~r2~0,] left hand side expression in assignment: lhs: VariableLHS[~r3~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~r0~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,] left hand side expression in assignment: lhs: VariableLHS[~r2~0,] left hand side expression in assignment: lhs: VariableLHS[~r3~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~r~1,] [2021-01-06 11:29:37,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:29:37,511 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:29:37,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37 WrapperNode [2021-01-06 11:29:37,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:29:37,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:29:37,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:29:37,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:29:37,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:29:37,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:29:37,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:29:37,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:29:37,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (1/1) ... [2021-01-06 11:29:37,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:29:37,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:29:37,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:29:37,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:29:37,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (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 11:29:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:29:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:29:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:29:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:29:39,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:29:39,040 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 11:29:39,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:29:39 BoogieIcfgContainer [2021-01-06 11:29:39,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:29:39,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:29:39,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:29:39,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:29:39,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:29:37" (1/3) ... [2021-01-06 11:29:39,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50adcc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:29:39, skipping insertion in model container [2021-01-06 11:29:39,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:29:37" (2/3) ... [2021-01-06 11:29:39,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50adcc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:29:39, skipping insertion in model container [2021-01-06 11:29:39,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:29:39" (3/3) ... [2021-01-06 11:29:39,055 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-01-06 11:29:39,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:29:39,070 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:29:39,094 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:29:39,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:29:39,145 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:29:39,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:29:39,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:29:39,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:29:39,147 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:29:39,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:29:39,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:29:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-01-06 11:29:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:29:39,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:39,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:39,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1979526715, now seen corresponding path program 1 times [2021-01-06 11:29:39,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:39,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782013194] [2021-01-06 11:29:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:39,499 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 11:29:39,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782013194] [2021-01-06 11:29:39,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:39,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:29:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647736052] [2021-01-06 11:29:39,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:29:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:29:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:29:39,533 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2021-01-06 11:29:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:39,570 INFO L93 Difference]: Finished difference Result 92 states and 160 transitions. [2021-01-06 11:29:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:29:39,572 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 11:29:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:39,598 INFO L225 Difference]: With dead ends: 92 [2021-01-06 11:29:39,598 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 11:29:39,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:29:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 11:29:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 11:29:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:29:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-01-06 11:29:39,662 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 13 [2021-01-06 11:29:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:39,662 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-01-06 11:29:39,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:29:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-01-06 11:29:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:29:39,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:39,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:39,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:29:39,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 726479629, now seen corresponding path program 1 times [2021-01-06 11:29:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:39,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107182361] [2021-01-06 11:29:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:39,874 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 11:29:39,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107182361] [2021-01-06 11:29:39,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:39,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:29:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11030752] [2021-01-06 11:29:39,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:29:39,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:29:39,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:29:39,882 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand 3 states. [2021-01-06 11:29:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:40,170 INFO L93 Difference]: Finished difference Result 112 states and 190 transitions. [2021-01-06 11:29:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:29:40,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 11:29:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:40,175 INFO L225 Difference]: With dead ends: 112 [2021-01-06 11:29:40,175 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 11:29:40,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 11:29:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 11:29:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-01-06 11:29:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:29:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 109 transitions. [2021-01-06 11:29:40,194 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 109 transitions. Word has length 13 [2021-01-06 11:29:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:40,194 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 109 transitions. [2021-01-06 11:29:40,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:29:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 109 transitions. [2021-01-06 11:29:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:29:40,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:40,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:40,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:29:40,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 727939832, now seen corresponding path program 1 times [2021-01-06 11:29:40,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:40,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432927922] [2021-01-06 11:29:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:29:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432927922] [2021-01-06 11:29:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:29:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061533694] [2021-01-06 11:29:40,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:40,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:29:40,349 INFO L87 Difference]: Start difference. First operand 73 states and 109 transitions. Second operand 4 states. [2021-01-06 11:29:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:40,678 INFO L93 Difference]: Finished difference Result 184 states and 301 transitions. [2021-01-06 11:29:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:29:40,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 11:29:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:40,681 INFO L225 Difference]: With dead ends: 184 [2021-01-06 11:29:40,682 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 11:29:40,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 11:29:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 11:29:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2021-01-06 11:29:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 11:29:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 150 transitions. [2021-01-06 11:29:40,695 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 150 transitions. Word has length 19 [2021-01-06 11:29:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:40,696 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 150 transitions. [2021-01-06 11:29:40,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 150 transitions. [2021-01-06 11:29:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:29:40,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:40,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:40,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:29:40,699 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash -302552601, now seen corresponding path program 1 times [2021-01-06 11:29:40,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:40,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111312999] [2021-01-06 11:29:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:29:40,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111312999] [2021-01-06 11:29:40,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:40,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:29:40,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396561913] [2021-01-06 11:29:40,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:40,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:29:40,862 INFO L87 Difference]: Start difference. First operand 101 states and 150 transitions. Second operand 4 states. [2021-01-06 11:29:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:41,159 INFO L93 Difference]: Finished difference Result 302 states and 441 transitions. [2021-01-06 11:29:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:29:41,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-01-06 11:29:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:41,165 INFO L225 Difference]: With dead ends: 302 [2021-01-06 11:29:41,165 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 11:29:41,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 11:29:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 11:29:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 108. [2021-01-06 11:29:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 11:29:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2021-01-06 11:29:41,202 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 25 [2021-01-06 11:29:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:41,202 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2021-01-06 11:29:41,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2021-01-06 11:29:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:29:41,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:41,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:41,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 11:29:41,211 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:41,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1128243813, now seen corresponding path program 1 times [2021-01-06 11:29:41,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:41,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798644877] [2021-01-06 11:29:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 11:29:41,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798644877] [2021-01-06 11:29:41,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:41,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:29:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780291662] [2021-01-06 11:29:41,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:29:41,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:29:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:29:41,377 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand 3 states. [2021-01-06 11:29:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:41,386 INFO L93 Difference]: Finished difference Result 195 states and 288 transitions. [2021-01-06 11:29:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:29:41,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-01-06 11:29:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:41,388 INFO L225 Difference]: With dead ends: 195 [2021-01-06 11:29:41,388 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 11:29:41,389 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 11:29:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 11:29:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 11:29:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 11:29:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2021-01-06 11:29:41,396 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 26 [2021-01-06 11:29:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:41,396 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2021-01-06 11:29:41,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:29:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2021-01-06 11:29:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:29:41,398 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:41,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:41,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 11:29:41,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash 479327523, now seen corresponding path program 1 times [2021-01-06 11:29:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:41,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271649484] [2021-01-06 11:29:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:29:41,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271649484] [2021-01-06 11:29:41,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:41,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:29:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891855391] [2021-01-06 11:29:41,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:41,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:29:41,556 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand 4 states. [2021-01-06 11:29:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:41,830 INFO L93 Difference]: Finished difference Result 291 states and 438 transitions. [2021-01-06 11:29:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:29:41,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-01-06 11:29:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:41,833 INFO L225 Difference]: With dead ends: 291 [2021-01-06 11:29:41,833 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 11:29:41,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 11:29:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 11:29:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 140. [2021-01-06 11:29:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 11:29:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 208 transitions. [2021-01-06 11:29:41,843 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 208 transitions. Word has length 32 [2021-01-06 11:29:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:41,844 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 208 transitions. [2021-01-06 11:29:41,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 208 transitions. [2021-01-06 11:29:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:29:41,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:41,846 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:41,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 11:29:41,847 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 530078734, now seen corresponding path program 1 times [2021-01-06 11:29:41,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:41,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190096180] [2021-01-06 11:29:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 11:29:42,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190096180] [2021-01-06 11:29:42,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459698314] [2021-01-06 11:29:42,024 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 11:29:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:29:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:29:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 11:29:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:29:42,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-01-06 11:29:42,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385390832] [2021-01-06 11:29:42,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:29:42,338 INFO L87 Difference]: Start difference. First operand 140 states and 208 transitions. Second operand 4 states. [2021-01-06 11:29:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:42,593 INFO L93 Difference]: Finished difference Result 329 states and 506 transitions. [2021-01-06 11:29:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:29:42,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2021-01-06 11:29:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:42,595 INFO L225 Difference]: With dead ends: 329 [2021-01-06 11:29:42,595 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 11:29:42,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:29:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 11:29:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 181. [2021-01-06 11:29:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 11:29:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 257 transitions. [2021-01-06 11:29:42,617 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 257 transitions. Word has length 38 [2021-01-06 11:29:42,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:42,620 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 257 transitions. [2021-01-06 11:29:42,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 257 transitions. [2021-01-06 11:29:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:29:42,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:42,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:42,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:29:42,845 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -371643651, now seen corresponding path program 1 times [2021-01-06 11:29:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:42,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466292671] [2021-01-06 11:29:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 11:29:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466292671] [2021-01-06 11:29:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718942266] [2021-01-06 11:29:43,066 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 11:29:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:29:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:29:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 11:29:43,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:29:43,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-01-06 11:29:43,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662994413] [2021-01-06 11:29:43,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:29:43,317 INFO L87 Difference]: Start difference. First operand 181 states and 257 transitions. Second operand 4 states. [2021-01-06 11:29:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:43,438 INFO L93 Difference]: Finished difference Result 544 states and 769 transitions. [2021-01-06 11:29:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:29:43,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-01-06 11:29:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:43,442 INFO L225 Difference]: With dead ends: 544 [2021-01-06 11:29:43,443 INFO L226 Difference]: Without dead ends: 374 [2021-01-06 11:29:43,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:29:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-01-06 11:29:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 322. [2021-01-06 11:29:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2021-01-06 11:29:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 458 transitions. [2021-01-06 11:29:43,468 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 458 transitions. Word has length 44 [2021-01-06 11:29:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:43,468 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 458 transitions. [2021-01-06 11:29:43,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 458 transitions. [2021-01-06 11:29:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 11:29:43,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:43,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:43,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:29:43,684 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1999780942, now seen corresponding path program 1 times [2021-01-06 11:29:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:43,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175303901] [2021-01-06 11:29:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 11:29:43,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175303901] [2021-01-06 11:29:43,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541589461] [2021-01-06 11:29:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:29:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:29:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:29:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 11:29:44,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:29:44,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2021-01-06 11:29:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232342094] [2021-01-06 11:29:44,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:29:44,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:29:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:29:44,203 INFO L87 Difference]: Start difference. First operand 322 states and 458 transitions. Second operand 4 states. [2021-01-06 11:29:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:44,350 INFO L93 Difference]: Finished difference Result 738 states and 1052 transitions. [2021-01-06 11:29:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:29:44,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2021-01-06 11:29:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:44,355 INFO L225 Difference]: With dead ends: 738 [2021-01-06 11:29:44,355 INFO L226 Difference]: Without dead ends: 376 [2021-01-06 11:29:44,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:29:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-01-06 11:29:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 342. [2021-01-06 11:29:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2021-01-06 11:29:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 458 transitions. [2021-01-06 11:29:44,379 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 458 transitions. Word has length 45 [2021-01-06 11:29:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:44,380 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 458 transitions. [2021-01-06 11:29:44,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:29:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 458 transitions. [2021-01-06 11:29:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 11:29:44,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:44,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:29:44,588 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1974065164, now seen corresponding path program 1 times [2021-01-06 11:29:44,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:44,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033046060] [2021-01-06 11:29:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 11:29:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033046060] [2021-01-06 11:29:44,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:44,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 11:29:44,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588831523] [2021-01-06 11:29:44,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:29:44,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:44,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:29:44,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:29:44,806 INFO L87 Difference]: Start difference. First operand 342 states and 458 transitions. Second operand 5 states. [2021-01-06 11:29:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:45,177 INFO L93 Difference]: Finished difference Result 728 states and 968 transitions. [2021-01-06 11:29:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:29:45,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2021-01-06 11:29:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:45,184 INFO L225 Difference]: With dead ends: 728 [2021-01-06 11:29:45,184 INFO L226 Difference]: Without dead ends: 561 [2021-01-06 11:29:45,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:29:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-01-06 11:29:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 350. [2021-01-06 11:29:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2021-01-06 11:29:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 466 transitions. [2021-01-06 11:29:45,229 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 466 transitions. Word has length 66 [2021-01-06 11:29:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:45,230 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 466 transitions. [2021-01-06 11:29:45,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:29:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 466 transitions. [2021-01-06 11:29:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 11:29:45,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:45,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:45,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 11:29:45,234 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:45,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1724423468, now seen corresponding path program 1 times [2021-01-06 11:29:45,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:45,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917103762] [2021-01-06 11:29:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 11:29:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917103762] [2021-01-06 11:29:45,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:45,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 11:29:45,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475448231] [2021-01-06 11:29:45,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:29:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:29:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:29:45,450 INFO L87 Difference]: Start difference. First operand 350 states and 466 transitions. Second operand 6 states. [2021-01-06 11:29:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:45,996 INFO L93 Difference]: Finished difference Result 918 states and 1218 transitions. [2021-01-06 11:29:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:29:45,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 11:29:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:46,002 INFO L225 Difference]: With dead ends: 918 [2021-01-06 11:29:46,002 INFO L226 Difference]: Without dead ends: 751 [2021-01-06 11:29:46,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:29:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-01-06 11:29:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 350. [2021-01-06 11:29:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2021-01-06 11:29:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 466 transitions. [2021-01-06 11:29:46,021 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 466 transitions. Word has length 67 [2021-01-06 11:29:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:46,021 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 466 transitions. [2021-01-06 11:29:46,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:29:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 466 transitions. [2021-01-06 11:29:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 11:29:46,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:46,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:46,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 11:29:46,024 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash 608969170, now seen corresponding path program 1 times [2021-01-06 11:29:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:46,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491641985] [2021-01-06 11:29:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 11:29:46,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491641985] [2021-01-06 11:29:46,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:29:46,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 11:29:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827688186] [2021-01-06 11:29:46,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:29:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:29:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:29:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:29:46,192 INFO L87 Difference]: Start difference. First operand 350 states and 466 transitions. Second operand 7 states. [2021-01-06 11:29:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:29:46,911 INFO L93 Difference]: Finished difference Result 937 states and 1239 transitions. [2021-01-06 11:29:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:29:46,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2021-01-06 11:29:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:29:46,916 INFO L225 Difference]: With dead ends: 937 [2021-01-06 11:29:46,917 INFO L226 Difference]: Without dead ends: 770 [2021-01-06 11:29:46,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:29:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-01-06 11:29:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 346. [2021-01-06 11:29:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2021-01-06 11:29:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 462 transitions. [2021-01-06 11:29:46,947 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 462 transitions. Word has length 67 [2021-01-06 11:29:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:29:46,948 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 462 transitions. [2021-01-06 11:29:46,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:29:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 462 transitions. [2021-01-06 11:29:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 11:29:46,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:29:46,950 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:29:46,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 11:29:46,951 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:29:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:29:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 124562097, now seen corresponding path program 1 times [2021-01-06 11:29:46,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:29:46,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272711194] [2021-01-06 11:29:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:29:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 11:29:47,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272711194] [2021-01-06 11:29:47,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679668533] [2021-01-06 11:29:47,177 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 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 11:29:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:29:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:29:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates...