/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/soft_float_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:39:14,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:39:14,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:39:14,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:39:14,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:39:14,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:39:14,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:39:14,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:39:14,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:39:14,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:39:14,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:39:14,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:39:14,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:39:14,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:39:14,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:39:14,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:39:14,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:39:14,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:39:14,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:39:14,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:39:14,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:39:14,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:39:14,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:39:14,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:39:14,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 01:39:14,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 01:39:14,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 01:39:14,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 01:39:14,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 01:39:14,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 01:39:14,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:39:14,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:39:14,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:39:14,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:39:14,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:39:14,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:39:14,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:39:14,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:39:14,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:39:14,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:39:14,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:39:14,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:39:14,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:39:14,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:39:14,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:39:14,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:39:14,234 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:39:14,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:39:14,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:39:14,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:39:14,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:39:14,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:39:14,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:39:14,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:39:14,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:39:14,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:39:14,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:39:14,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:39:14,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:39:14,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:39:14,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:39:14,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:39:14,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:39:14,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:39:14,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:39:14,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:39:14,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:39:14,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:39:14,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:39:14,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:39:14,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:39:14,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:39:14,681 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:39:14,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2020-12-23 01:39:14,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0d85e40db/9f666001c3e24c0ea4a6c1b9a435c50c/FLAG7f260d2a4 [2020-12-23 01:39:15,545 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:39:15,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2020-12-23 01:39:15,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0d85e40db/9f666001c3e24c0ea4a6c1b9a435c50c/FLAG7f260d2a4 [2020-12-23 01:39:15,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0d85e40db/9f666001c3e24c0ea4a6c1b9a435c50c [2020-12-23 01:39:15,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:39:15,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:39:15,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:39:15,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:39:15,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:39:15,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:39:15" (1/1) ... [2020-12-23 01:39:15,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475719a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:15, skipping insertion in model container [2020-12-23 01:39:15,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:39:15" (1/1) ... [2020-12-23 01:39:15,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:39:15,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:39:16,093 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/soft_float_3a.c.cil.c[423,436] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~e,] left hand side expression in assignment: lhs: VariableLHS[~m,] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~e,] left hand side expression in assignment: lhs: VariableLHS[~m,] left hand side expression in assignment: lhs: VariableLHS[~m,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~a,] left hand side expression in assignment: lhs: VariableLHS[~b,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~mb~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~eb~0,] left hand side expression in assignment: lhs: VariableLHS[~mb~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~delta~0,] left hand side expression in assignment: lhs: VariableLHS[~mb~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ea~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~a,] left hand side expression in assignment: lhs: VariableLHS[~b,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~mb~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~eb~1,] left hand side expression in assignment: lhs: VariableLHS[~mb~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~2,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~zero~0,] left hand side expression in assignment: lhs: VariableLHS[~one~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~r_mul~0,] left hand side expression in assignment: lhs: VariableLHS[~sb~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~sb~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres16~0,] [2020-12-23 01:39:16,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:39:16,187 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:39:16,205 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/soft_float_3a.c.cil.c[423,436] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~e,] left hand side expression in assignment: lhs: VariableLHS[~m,] left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~e,] left hand side expression in assignment: lhs: VariableLHS[~m,] left hand side expression in assignment: lhs: VariableLHS[~m,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres4~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~a,] left hand side expression in assignment: lhs: VariableLHS[~b,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~mb~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~eb~0,] left hand side expression in assignment: lhs: VariableLHS[~mb~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~delta~0,] left hand side expression in assignment: lhs: VariableLHS[~mb~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~ea~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] left hand side expression in assignment: lhs: VariableLHS[~ma~0,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres10~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~a,] left hand side expression in assignment: lhs: VariableLHS[~b,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~mb~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~eb~1,] left hand side expression in assignment: lhs: VariableLHS[~mb~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ea~1,] left hand side expression in assignment: lhs: VariableLHS[~accu~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] left hand side expression in assignment: lhs: VariableLHS[~ma~1,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~res~2,] ----Is the binary operator a bitwise operator? true left hand side expression in assignment: lhs: VariableLHS[~__retres10~1,] left hand side expression in assignment: lhs: VariableLHS[~zero~0,] left hand side expression in assignment: lhs: VariableLHS[~one~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~r_mul~0,] left hand side expression in assignment: lhs: VariableLHS[~sb~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~sb~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres16~0,] [2020-12-23 01:39:16,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:39:16,303 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:39:16,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16 WrapperNode [2020-12-23 01:39:16,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:39:16,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:39:16,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:39:16,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:39:16,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:39:16,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:39:16,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:39:16,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:39:16,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (1/1) ... [2020-12-23 01:39:16,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:39:16,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:39:16,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:39:16,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:39:16,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (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 [2020-12-23 01:39:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:39:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:39:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:39:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:39:17,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:39:17,551 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-23 01:39:17,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:39:17 BoogieIcfgContainer [2020-12-23 01:39:17,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:39:17,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:39:17,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:39:17,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:39:17,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:39:15" (1/3) ... [2020-12-23 01:39:17,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ad74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:39:17, skipping insertion in model container [2020-12-23 01:39:17,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:39:16" (2/3) ... [2020-12-23 01:39:17,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ad74f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:39:17, skipping insertion in model container [2020-12-23 01:39:17,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:39:17" (3/3) ... [2020-12-23 01:39:17,578 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2020-12-23 01:39:17,587 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:39:17,593 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:39:17,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:39:17,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:39:17,669 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:39:17,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:39:17,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:39:17,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:39:17,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:39:17,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:39:17,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:39:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-12-23 01:39:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:39:17,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:17,713 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] [2020-12-23 01:39:17,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1207621879, now seen corresponding path program 1 times [2020-12-23 01:39:17,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:17,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19105511] [2020-12-23 01:39:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19105511] [2020-12-23 01:39:18,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:18,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:39:18,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958372556] [2020-12-23 01:39:18,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:39:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:18,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:39:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:39:18,123 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 3 states. [2020-12-23 01:39:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:18,219 INFO L93 Difference]: Finished difference Result 257 states and 463 transitions. [2020-12-23 01:39:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:39:18,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-23 01:39:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:18,249 INFO L225 Difference]: With dead ends: 257 [2020-12-23 01:39:18,249 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 01:39:18,258 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 [2020-12-23 01:39:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 01:39:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-23 01:39:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 01:39:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 206 transitions. [2020-12-23 01:39:18,322 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 206 transitions. Word has length 24 [2020-12-23 01:39:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:18,322 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 206 transitions. [2020-12-23 01:39:18,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:39:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 206 transitions. [2020-12-23 01:39:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:39:18,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:18,325 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] [2020-12-23 01:39:18,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:39:18,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1350279153, now seen corresponding path program 1 times [2020-12-23 01:39:18,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:18,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212659594] [2020-12-23 01:39:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:18,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212659594] [2020-12-23 01:39:18,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:18,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:39:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273944897] [2020-12-23 01:39:18,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:39:18,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:39:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:39:18,470 INFO L87 Difference]: Start difference. First operand 127 states and 206 transitions. Second operand 4 states. [2020-12-23 01:39:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:18,523 INFO L93 Difference]: Finished difference Result 136 states and 216 transitions. [2020-12-23 01:39:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:39:18,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-23 01:39:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:18,528 INFO L225 Difference]: With dead ends: 136 [2020-12-23 01:39:18,529 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 01:39:18,532 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 [2020-12-23 01:39:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 01:39:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-23 01:39:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 01:39:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 205 transitions. [2020-12-23 01:39:18,552 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 205 transitions. Word has length 26 [2020-12-23 01:39:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:18,552 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 205 transitions. [2020-12-23 01:39:18,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:39:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 205 transitions. [2020-12-23 01:39:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:39:18,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:18,559 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] [2020-12-23 01:39:18,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:39:18,559 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1169680781, now seen corresponding path program 1 times [2020-12-23 01:39:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:18,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934846422] [2020-12-23 01:39:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:18,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934846422] [2020-12-23 01:39:18,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:18,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:39:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499398452] [2020-12-23 01:39:18,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:39:18,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:39:18,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:39:18,657 INFO L87 Difference]: Start difference. First operand 127 states and 205 transitions. Second operand 3 states. [2020-12-23 01:39:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:18,840 INFO L93 Difference]: Finished difference Result 288 states and 447 transitions. [2020-12-23 01:39:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:39:18,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-23 01:39:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:18,843 INFO L225 Difference]: With dead ends: 288 [2020-12-23 01:39:18,843 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 01:39:18,845 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 [2020-12-23 01:39:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 01:39:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2020-12-23 01:39:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 01:39:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 198 transitions. [2020-12-23 01:39:18,856 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 198 transitions. Word has length 26 [2020-12-23 01:39:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:18,857 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 198 transitions. [2020-12-23 01:39:18,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:39:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 198 transitions. [2020-12-23 01:39:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 01:39:18,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:18,858 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] [2020-12-23 01:39:18,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:39:18,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2012799916, now seen corresponding path program 1 times [2020-12-23 01:39:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:18,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897471054] [2020-12-23 01:39:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:18,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897471054] [2020-12-23 01:39:18,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:18,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:39:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814454395] [2020-12-23 01:39:18,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:39:18,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:39:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:39:18,902 INFO L87 Difference]: Start difference. First operand 124 states and 198 transitions. Second operand 3 states. [2020-12-23 01:39:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:18,993 INFO L93 Difference]: Finished difference Result 248 states and 394 transitions. [2020-12-23 01:39:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:39:18,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-23 01:39:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:18,995 INFO L225 Difference]: With dead ends: 248 [2020-12-23 01:39:18,995 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 01:39:18,996 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 [2020-12-23 01:39:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 01:39:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-12-23 01:39:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 01:39:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 219 transitions. [2020-12-23 01:39:19,007 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 219 transitions. Word has length 29 [2020-12-23 01:39:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:19,007 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 219 transitions. [2020-12-23 01:39:19,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:39:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 219 transitions. [2020-12-23 01:39:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 01:39:19,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:19,009 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 01:39:19,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 01:39:19,009 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1475279515, now seen corresponding path program 1 times [2020-12-23 01:39:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:19,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412021330] [2020-12-23 01:39:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:19,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412021330] [2020-12-23 01:39:19,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545228959] [2020-12-23 01:39:19,056 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 [2020-12-23 01:39:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:19,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 01:39:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:19,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:19,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 01:39:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135832360] [2020-12-23 01:39:19,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:39:19,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:39:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:39:19,230 INFO L87 Difference]: Start difference. First operand 139 states and 219 transitions. Second operand 5 states. [2020-12-23 01:39:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:19,383 INFO L93 Difference]: Finished difference Result 342 states and 532 transitions. [2020-12-23 01:39:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:39:19,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-23 01:39:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:19,385 INFO L225 Difference]: With dead ends: 342 [2020-12-23 01:39:19,385 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 01:39:19,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:39:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 01:39:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 153. [2020-12-23 01:39:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 01:39:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 240 transitions. [2020-12-23 01:39:19,396 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 240 transitions. Word has length 32 [2020-12-23 01:39:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:19,396 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 240 transitions. [2020-12-23 01:39:19,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:39:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 240 transitions. [2020-12-23 01:39:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 01:39:19,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:19,397 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, 1] [2020-12-23 01:39:19,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:19,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -18504886, now seen corresponding path program 1 times [2020-12-23 01:39:19,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:19,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631636381] [2020-12-23 01:39:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:19,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631636381] [2020-12-23 01:39:19,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:19,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:39:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370947812] [2020-12-23 01:39:19,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:39:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:39:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:39:19,740 INFO L87 Difference]: Start difference. First operand 153 states and 240 transitions. Second operand 4 states. [2020-12-23 01:39:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:20,006 INFO L93 Difference]: Finished difference Result 414 states and 628 transitions. [2020-12-23 01:39:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:39:20,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-12-23 01:39:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:20,009 INFO L225 Difference]: With dead ends: 414 [2020-12-23 01:39:20,009 INFO L226 Difference]: Without dead ends: 281 [2020-12-23 01:39:20,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:39:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-23 01:39:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 139. [2020-12-23 01:39:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 01:39:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 216 transitions. [2020-12-23 01:39:20,017 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 216 transitions. Word has length 33 [2020-12-23 01:39:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:20,017 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 216 transitions. [2020-12-23 01:39:20,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:39:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 216 transitions. [2020-12-23 01:39:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:39:20,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:20,019 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-23 01:39:20,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 01:39:20,019 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 156907188, now seen corresponding path program 2 times [2020-12-23 01:39:20,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:20,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130499237] [2020-12-23 01:39:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130499237] [2020-12-23 01:39:20,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191465172] [2020-12-23 01:39:20,104 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 [2020-12-23 01:39:20,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 01:39:20,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:39:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 01:39:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:39:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-23 01:39:20,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000545653] [2020-12-23 01:39:20,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:39:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:39:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:20,270 INFO L87 Difference]: Start difference. First operand 139 states and 216 transitions. Second operand 6 states. [2020-12-23 01:39:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:20,540 INFO L93 Difference]: Finished difference Result 408 states and 612 transitions. [2020-12-23 01:39:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:39:20,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-12-23 01:39:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:20,543 INFO L225 Difference]: With dead ends: 408 [2020-12-23 01:39:20,543 INFO L226 Difference]: Without dead ends: 272 [2020-12-23 01:39:20,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-23 01:39:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 129. [2020-12-23 01:39:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 01:39:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 198 transitions. [2020-12-23 01:39:20,551 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 198 transitions. Word has length 35 [2020-12-23 01:39:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:20,552 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 198 transitions. [2020-12-23 01:39:20,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:39:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 198 transitions. [2020-12-23 01:39:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 01:39:20,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:20,553 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-23 01:39:20,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:20,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash 415072626, now seen corresponding path program 1 times [2020-12-23 01:39:20,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:20,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615399063] [2020-12-23 01:39:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:20,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615399063] [2020-12-23 01:39:20,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693684544] [2020-12-23 01:39:20,847 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 [2020-12-23 01:39:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 01:39:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:20,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:20,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:39:20,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413433991] [2020-12-23 01:39:20,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:39:20,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:39:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:39:20,977 INFO L87 Difference]: Start difference. First operand 129 states and 198 transitions. Second operand 6 states. [2020-12-23 01:39:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:21,077 INFO L93 Difference]: Finished difference Result 302 states and 462 transitions. [2020-12-23 01:39:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:39:21,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-12-23 01:39:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:21,079 INFO L225 Difference]: With dead ends: 302 [2020-12-23 01:39:21,079 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 01:39:21,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:39:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 01:39:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-12-23 01:39:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 01:39:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2020-12-23 01:39:21,090 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 35 [2020-12-23 01:39:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:21,091 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2020-12-23 01:39:21,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:39:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2020-12-23 01:39:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:39:21,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:21,097 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-23 01:39:21,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:21,299 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash -702159207, now seen corresponding path program 1 times [2020-12-23 01:39:21,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:21,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457700903] [2020-12-23 01:39:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:21,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457700903] [2020-12-23 01:39:21,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675369341] [2020-12-23 01:39:21,373 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 [2020-12-23 01:39:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:39:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:39:21,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:39:21,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-23 01:39:21,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915750866] [2020-12-23 01:39:21,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:39:21,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:39:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:21,518 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand 6 states. [2020-12-23 01:39:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:21,812 INFO L93 Difference]: Finished difference Result 363 states and 523 transitions. [2020-12-23 01:39:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:39:21,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-12-23 01:39:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:21,818 INFO L225 Difference]: With dead ends: 363 [2020-12-23 01:39:21,818 INFO L226 Difference]: Without dead ends: 359 [2020-12-23 01:39:21,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:39:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-23 01:39:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 211. [2020-12-23 01:39:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 01:39:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 324 transitions. [2020-12-23 01:39:21,830 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 324 transitions. Word has length 36 [2020-12-23 01:39:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:21,830 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 324 transitions. [2020-12-23 01:39:21,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:39:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 324 transitions. [2020-12-23 01:39:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:39:21,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:21,832 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-12-23 01:39:22,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:22,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash -413548973, now seen corresponding path program 1 times [2020-12-23 01:39:22,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:22,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834427098] [2020-12-23 01:39:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:22,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834427098] [2020-12-23 01:39:22,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908226416] [2020-12-23 01:39:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:39:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:39:22,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:39:22,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-12-23 01:39:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94993241] [2020-12-23 01:39:22,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:39:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:39:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:22,321 INFO L87 Difference]: Start difference. First operand 211 states and 324 transitions. Second operand 6 states. [2020-12-23 01:39:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:22,578 INFO L93 Difference]: Finished difference Result 364 states and 522 transitions. [2020-12-23 01:39:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:39:22,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-12-23 01:39:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:22,581 INFO L225 Difference]: With dead ends: 364 [2020-12-23 01:39:22,582 INFO L226 Difference]: Without dead ends: 359 [2020-12-23 01:39:22,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-12-23 01:39:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 226. [2020-12-23 01:39:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 01:39:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 340 transitions. [2020-12-23 01:39:22,595 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 340 transitions. Word has length 38 [2020-12-23 01:39:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:22,596 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 340 transitions. [2020-12-23 01:39:22,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:39:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 340 transitions. [2020-12-23 01:39:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 01:39:22,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:22,597 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-12-23 01:39:22,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 01:39:22,813 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash -411701931, now seen corresponding path program 1 times [2020-12-23 01:39:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:22,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741442543] [2020-12-23 01:39:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 01:39:22,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741442543] [2020-12-23 01:39:22,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:39:22,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 01:39:22,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979231066] [2020-12-23 01:39:22,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 01:39:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 01:39:22,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 01:39:22,866 INFO L87 Difference]: Start difference. First operand 226 states and 340 transitions. Second operand 5 states. [2020-12-23 01:39:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:22,898 INFO L93 Difference]: Finished difference Result 231 states and 344 transitions. [2020-12-23 01:39:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 01:39:22,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-23 01:39:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:22,901 INFO L225 Difference]: With dead ends: 231 [2020-12-23 01:39:22,901 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 01:39:22,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:39:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 01:39:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-12-23 01:39:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-23 01:39:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 322 transitions. [2020-12-23 01:39:22,909 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 322 transitions. Word has length 38 [2020-12-23 01:39:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:22,909 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 322 transitions. [2020-12-23 01:39:22,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 01:39:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 322 transitions. [2020-12-23 01:39:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 01:39:22,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:22,912 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-12-23 01:39:22,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 01:39:22,912 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2093191240, now seen corresponding path program 1 times [2020-12-23 01:39:22,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:22,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935087782] [2020-12-23 01:39:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935087782] [2020-12-23 01:39:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486455898] [2020-12-23 01:39:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:39:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:23,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:23,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 01:39:23,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721024687] [2020-12-23 01:39:23,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 01:39:23,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 01:39:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:39:23,216 INFO L87 Difference]: Start difference. First operand 214 states and 322 transitions. Second operand 6 states. [2020-12-23 01:39:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:23,567 INFO L93 Difference]: Finished difference Result 630 states and 923 transitions. [2020-12-23 01:39:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 01:39:23,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-23 01:39:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:23,570 INFO L225 Difference]: With dead ends: 630 [2020-12-23 01:39:23,570 INFO L226 Difference]: Without dead ends: 445 [2020-12-23 01:39:23,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 01:39:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-12-23 01:39:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 207. [2020-12-23 01:39:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 01:39:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 309 transitions. [2020-12-23 01:39:23,581 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 309 transitions. Word has length 40 [2020-12-23 01:39:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:23,581 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 309 transitions. [2020-12-23 01:39:23,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 01:39:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 309 transitions. [2020-12-23 01:39:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 01:39:23,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:23,582 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 01:39:23,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:23,797 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1801806222, now seen corresponding path program 1 times [2020-12-23 01:39:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:23,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922196870] [2020-12-23 01:39:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:23,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922196870] [2020-12-23 01:39:23,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530777329] [2020-12-23 01:39:23,853 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:39:23,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:24,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:24,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:39:24,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144782594] [2020-12-23 01:39:24,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:39:24,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:39:24,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:39:24,012 INFO L87 Difference]: Start difference. First operand 207 states and 309 transitions. Second operand 7 states. [2020-12-23 01:39:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:24,138 INFO L93 Difference]: Finished difference Result 507 states and 751 transitions. [2020-12-23 01:39:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:39:24,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-12-23 01:39:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:24,142 INFO L225 Difference]: With dead ends: 507 [2020-12-23 01:39:24,142 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 01:39:24,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:39:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 01:39:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 217. [2020-12-23 01:39:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 01:39:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2020-12-23 01:39:24,154 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 42 [2020-12-23 01:39:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:24,154 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2020-12-23 01:39:24,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:39:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2020-12-23 01:39:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 01:39:24,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:24,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2020-12-23 01:39:24,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:24,370 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1600782999, now seen corresponding path program 2 times [2020-12-23 01:39:24,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:24,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639164905] [2020-12-23 01:39:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639164905] [2020-12-23 01:39:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628187316] [2020-12-23 01:39:24,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:24,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:39:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:24,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:24,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 01:39:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689523199] [2020-12-23 01:39:24,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:39:24,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:39:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:39:24,691 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand 7 states. [2020-12-23 01:39:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:25,006 INFO L93 Difference]: Finished difference Result 633 states and 926 transitions. [2020-12-23 01:39:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 01:39:25,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-12-23 01:39:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:25,010 INFO L225 Difference]: With dead ends: 633 [2020-12-23 01:39:25,010 INFO L226 Difference]: Without dead ends: 448 [2020-12-23 01:39:25,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:39:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-12-23 01:39:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 210. [2020-12-23 01:39:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 01:39:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 312 transitions. [2020-12-23 01:39:25,022 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 312 transitions. Word has length 43 [2020-12-23 01:39:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:25,022 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 312 transitions. [2020-12-23 01:39:25,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:39:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 312 transitions. [2020-12-23 01:39:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 01:39:25,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:25,024 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2020-12-23 01:39:25,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 01:39:25,239 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1735244033, now seen corresponding path program 2 times [2020-12-23 01:39:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657720040] [2020-12-23 01:39:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:25,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657720040] [2020-12-23 01:39:25,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265415642] [2020-12-23 01:39:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:25,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 01:39:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:25,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:25,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:39:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186006062] [2020-12-23 01:39:25,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:39:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:39:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:39:25,456 INFO L87 Difference]: Start difference. First operand 210 states and 312 transitions. Second operand 8 states. [2020-12-23 01:39:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:25,560 INFO L93 Difference]: Finished difference Result 510 states and 754 transitions. [2020-12-23 01:39:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:39:25,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-12-23 01:39:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:25,563 INFO L225 Difference]: With dead ends: 510 [2020-12-23 01:39:25,563 INFO L226 Difference]: Without dead ends: 333 [2020-12-23 01:39:25,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:39:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-23 01:39:25,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 220. [2020-12-23 01:39:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-23 01:39:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 328 transitions. [2020-12-23 01:39:25,574 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 328 transitions. Word has length 45 [2020-12-23 01:39:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:25,575 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 328 transitions. [2020-12-23 01:39:25,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:39:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 328 transitions. [2020-12-23 01:39:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 01:39:25,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:25,576 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:39:25,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 01:39:25,791 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -419808792, now seen corresponding path program 3 times [2020-12-23 01:39:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:25,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841886386] [2020-12-23 01:39:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841886386] [2020-12-23 01:39:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864515306] [2020-12-23 01:39:25,889 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:26,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:39:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:39:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:26,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:26,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 01:39:26,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986178874] [2020-12-23 01:39:26,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 01:39:26,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 01:39:26,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:39:26,277 INFO L87 Difference]: Start difference. First operand 220 states and 328 transitions. Second operand 8 states. [2020-12-23 01:39:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:26,719 INFO L93 Difference]: Finished difference Result 636 states and 929 transitions. [2020-12-23 01:39:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:39:26,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-12-23 01:39:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:26,722 INFO L225 Difference]: With dead ends: 636 [2020-12-23 01:39:26,722 INFO L226 Difference]: Without dead ends: 451 [2020-12-23 01:39:26,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 01:39:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-12-23 01:39:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 213. [2020-12-23 01:39:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-23 01:39:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 315 transitions. [2020-12-23 01:39:26,733 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 315 transitions. Word has length 46 [2020-12-23 01:39:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:26,734 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 315 transitions. [2020-12-23 01:39:26,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 01:39:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 315 transitions. [2020-12-23 01:39:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 01:39:26,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:26,735 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2020-12-23 01:39:26,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 01:39:26,942 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1271750674, now seen corresponding path program 3 times [2020-12-23 01:39:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:26,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056771142] [2020-12-23 01:39:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:27,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056771142] [2020-12-23 01:39:27,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058770333] [2020-12-23 01:39:27,002 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:27,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 01:39:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:39:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:27,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:27,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:39:27,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996206879] [2020-12-23 01:39:27,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:39:27,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:39:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:27,174 INFO L87 Difference]: Start difference. First operand 213 states and 315 transitions. Second operand 9 states. [2020-12-23 01:39:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:27,357 INFO L93 Difference]: Finished difference Result 513 states and 757 transitions. [2020-12-23 01:39:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:39:27,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-23 01:39:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:27,359 INFO L225 Difference]: With dead ends: 513 [2020-12-23 01:39:27,359 INFO L226 Difference]: Without dead ends: 336 [2020-12-23 01:39:27,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-23 01:39:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 223. [2020-12-23 01:39:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 01:39:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 331 transitions. [2020-12-23 01:39:27,373 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 331 transitions. Word has length 48 [2020-12-23 01:39:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:27,373 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 331 transitions. [2020-12-23 01:39:27,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:39:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 331 transitions. [2020-12-23 01:39:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:39:27,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:27,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1] [2020-12-23 01:39:27,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 01:39:27,589 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1903201033, now seen corresponding path program 4 times [2020-12-23 01:39:27,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:27,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623105207] [2020-12-23 01:39:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623105207] [2020-12-23 01:39:27,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153555487] [2020-12-23 01:39:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:27,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:39:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:39:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:27,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:27,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 01:39:27,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5623163] [2020-12-23 01:39:27,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:39:27,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:39:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:27,914 INFO L87 Difference]: Start difference. First operand 223 states and 331 transitions. Second operand 9 states. [2020-12-23 01:39:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:28,382 INFO L93 Difference]: Finished difference Result 639 states and 932 transitions. [2020-12-23 01:39:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 01:39:28,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-12-23 01:39:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:28,385 INFO L225 Difference]: With dead ends: 639 [2020-12-23 01:39:28,385 INFO L226 Difference]: Without dead ends: 454 [2020-12-23 01:39:28,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:39:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-12-23 01:39:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 216. [2020-12-23 01:39:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-23 01:39:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 318 transitions. [2020-12-23 01:39:28,399 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 318 transitions. Word has length 49 [2020-12-23 01:39:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:28,399 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 318 transitions. [2020-12-23 01:39:28,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:39:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 318 transitions. [2020-12-23 01:39:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 01:39:28,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:28,400 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2020-12-23 01:39:28,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 01:39:28,613 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1660949345, now seen corresponding path program 4 times [2020-12-23 01:39:28,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:28,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930155647] [2020-12-23 01:39:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:28,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930155647] [2020-12-23 01:39:28,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415381003] [2020-12-23 01:39:28,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:28,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:39:28,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 01:39:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:28,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:28,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:39:28,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677965270] [2020-12-23 01:39:28,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:39:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:39:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:39:28,870 INFO L87 Difference]: Start difference. First operand 216 states and 318 transitions. Second operand 10 states. [2020-12-23 01:39:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:29,054 INFO L93 Difference]: Finished difference Result 516 states and 760 transitions. [2020-12-23 01:39:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:39:29,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-23 01:39:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:29,056 INFO L225 Difference]: With dead ends: 516 [2020-12-23 01:39:29,057 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 01:39:29,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:39:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 01:39:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 226. [2020-12-23 01:39:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 01:39:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 334 transitions. [2020-12-23 01:39:29,068 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 334 transitions. Word has length 51 [2020-12-23 01:39:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 334 transitions. [2020-12-23 01:39:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:39:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 334 transitions. [2020-12-23 01:39:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 01:39:29,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:29,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1] [2020-12-23 01:39:29,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:29,284 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1572023176, now seen corresponding path program 5 times [2020-12-23 01:39:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:29,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960462731] [2020-12-23 01:39:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:29,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960462731] [2020-12-23 01:39:29,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421634694] [2020-12-23 01:39:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:29,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 01:39:29,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:39:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:29,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:29,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 01:39:29,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354466687] [2020-12-23 01:39:29,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 01:39:29,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 01:39:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:39:29,609 INFO L87 Difference]: Start difference. First operand 226 states and 334 transitions. Second operand 10 states. [2020-12-23 01:39:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:30,143 INFO L93 Difference]: Finished difference Result 642 states and 935 transitions. [2020-12-23 01:39:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:39:30,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-12-23 01:39:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:30,146 INFO L225 Difference]: With dead ends: 642 [2020-12-23 01:39:30,146 INFO L226 Difference]: Without dead ends: 457 [2020-12-23 01:39:30,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 01:39:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-12-23 01:39:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 219. [2020-12-23 01:39:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 01:39:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 321 transitions. [2020-12-23 01:39:30,158 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 321 transitions. Word has length 52 [2020-12-23 01:39:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:30,158 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 321 transitions. [2020-12-23 01:39:30,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 01:39:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 321 transitions. [2020-12-23 01:39:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 01:39:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:30,159 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2020-12-23 01:39:30,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:30,373 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -133142094, now seen corresponding path program 5 times [2020-12-23 01:39:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668932226] [2020-12-23 01:39:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:30,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668932226] [2020-12-23 01:39:30,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637191924] [2020-12-23 01:39:30,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:30,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 01:39:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 01:39:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:30,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:30,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:39:30,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303882449] [2020-12-23 01:39:30,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:39:30,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:39:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:39:30,593 INFO L87 Difference]: Start difference. First operand 219 states and 321 transitions. Second operand 11 states. [2020-12-23 01:39:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:30,809 INFO L93 Difference]: Finished difference Result 519 states and 763 transitions. [2020-12-23 01:39:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:39:30,810 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-12-23 01:39:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:30,812 INFO L225 Difference]: With dead ends: 519 [2020-12-23 01:39:30,812 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 01:39:30,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:39:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 01:39:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 229. [2020-12-23 01:39:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 01:39:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 337 transitions. [2020-12-23 01:39:30,826 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 337 transitions. Word has length 54 [2020-12-23 01:39:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:30,826 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 337 transitions. [2020-12-23 01:39:30,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:39:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 337 transitions. [2020-12-23 01:39:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 01:39:30,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:30,828 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 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, 1, 1, 1] [2020-12-23 01:39:31,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 01:39:31,041 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1789763415, now seen corresponding path program 6 times [2020-12-23 01:39:31,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:31,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409664864] [2020-12-23 01:39:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:31,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409664864] [2020-12-23 01:39:31,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491204655] [2020-12-23 01:39:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:31,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 01:39:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:39:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:31,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:31,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 01:39:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886748412] [2020-12-23 01:39:31,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 01:39:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 01:39:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:39:31,855 INFO L87 Difference]: Start difference. First operand 229 states and 337 transitions. Second operand 11 states. [2020-12-23 01:39:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:32,504 INFO L93 Difference]: Finished difference Result 645 states and 938 transitions. [2020-12-23 01:39:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 01:39:32,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 01:39:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:32,508 INFO L225 Difference]: With dead ends: 645 [2020-12-23 01:39:32,508 INFO L226 Difference]: Without dead ends: 460 [2020-12-23 01:39:32,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 01:39:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-12-23 01:39:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 222. [2020-12-23 01:39:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 01:39:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 324 transitions. [2020-12-23 01:39:32,521 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 324 transitions. Word has length 55 [2020-12-23 01:39:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:32,521 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 324 transitions. [2020-12-23 01:39:32,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 01:39:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 324 transitions. [2020-12-23 01:39:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 01:39:32,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:32,522 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2020-12-23 01:39:32,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:32,729 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1338169919, now seen corresponding path program 6 times [2020-12-23 01:39:32,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:32,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384430258] [2020-12-23 01:39:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:32,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384430258] [2020-12-23 01:39:32,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392943414] [2020-12-23 01:39:32,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:32,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 01:39:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 01:39:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:32,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:32,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:39:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028937194] [2020-12-23 01:39:32,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:39:32,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:39:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:39:32,997 INFO L87 Difference]: Start difference. First operand 222 states and 324 transitions. Second operand 12 states. [2020-12-23 01:39:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:33,092 INFO L93 Difference]: Finished difference Result 522 states and 766 transitions. [2020-12-23 01:39:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:39:33,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-23 01:39:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:33,095 INFO L225 Difference]: With dead ends: 522 [2020-12-23 01:39:33,095 INFO L226 Difference]: Without dead ends: 345 [2020-12-23 01:39:33,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:39:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-23 01:39:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 232. [2020-12-23 01:39:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 01:39:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 340 transitions. [2020-12-23 01:39:33,108 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 340 transitions. Word has length 57 [2020-12-23 01:39:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:33,108 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 340 transitions. [2020-12-23 01:39:33,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:39:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 340 transitions. [2020-12-23 01:39:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 01:39:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:33,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 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, 1, 1, 1] [2020-12-23 01:39:33,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 01:39:33,324 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1206360792, now seen corresponding path program 7 times [2020-12-23 01:39:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:33,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290446831] [2020-12-23 01:39:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:33,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290446831] [2020-12-23 01:39:33,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686519679] [2020-12-23 01:39:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:39:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:33,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:33,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 01:39:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675330127] [2020-12-23 01:39:33,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 01:39:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 01:39:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:39:33,695 INFO L87 Difference]: Start difference. First operand 232 states and 340 transitions. Second operand 12 states. [2020-12-23 01:39:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:34,145 INFO L93 Difference]: Finished difference Result 648 states and 941 transitions. [2020-12-23 01:39:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:39:34,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-12-23 01:39:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:34,148 INFO L225 Difference]: With dead ends: 648 [2020-12-23 01:39:34,148 INFO L226 Difference]: Without dead ends: 463 [2020-12-23 01:39:34,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 01:39:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-23 01:39:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 225. [2020-12-23 01:39:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-23 01:39:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 327 transitions. [2020-12-23 01:39:34,159 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 327 transitions. Word has length 58 [2020-12-23 01:39:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:34,159 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 327 transitions. [2020-12-23 01:39:34,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 01:39:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 327 transitions. [2020-12-23 01:39:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 01:39:34,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:34,160 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2020-12-23 01:39:34,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 01:39:34,377 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1309522770, now seen corresponding path program 7 times [2020-12-23 01:39:34,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:34,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168311097] [2020-12-23 01:39:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:34,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168311097] [2020-12-23 01:39:34,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488764514] [2020-12-23 01:39:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 01:39:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:34,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:34,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:39:34,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220940751] [2020-12-23 01:39:34,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:39:34,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:39:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:39:34,642 INFO L87 Difference]: Start difference. First operand 225 states and 327 transitions. Second operand 13 states. [2020-12-23 01:39:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:34,895 INFO L93 Difference]: Finished difference Result 525 states and 769 transitions. [2020-12-23 01:39:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:39:34,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-12-23 01:39:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:34,898 INFO L225 Difference]: With dead ends: 525 [2020-12-23 01:39:34,898 INFO L226 Difference]: Without dead ends: 348 [2020-12-23 01:39:34,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:39:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-23 01:39:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 235. [2020-12-23 01:39:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-23 01:39:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 343 transitions. [2020-12-23 01:39:34,910 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 343 transitions. Word has length 60 [2020-12-23 01:39:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:34,910 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 343 transitions. [2020-12-23 01:39:34,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:39:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 343 transitions. [2020-12-23 01:39:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 01:39:34,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:34,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 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, 1, 1, 1] [2020-12-23 01:39:35,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 01:39:35,127 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash -732266057, now seen corresponding path program 8 times [2020-12-23 01:39:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:35,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983314973] [2020-12-23 01:39:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983314973] [2020-12-23 01:39:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821534759] [2020-12-23 01:39:35,288 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:35,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:39:35,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:35,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:35,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 01:39:35,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155125074] [2020-12-23 01:39:35,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 01:39:35,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 01:39:35,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:39:35,639 INFO L87 Difference]: Start difference. First operand 235 states and 343 transitions. Second operand 13 states. [2020-12-23 01:39:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:36,457 INFO L93 Difference]: Finished difference Result 651 states and 944 transitions. [2020-12-23 01:39:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 01:39:36,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-12-23 01:39:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:36,461 INFO L225 Difference]: With dead ends: 651 [2020-12-23 01:39:36,461 INFO L226 Difference]: Without dead ends: 466 [2020-12-23 01:39:36,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:39:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-23 01:39:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 228. [2020-12-23 01:39:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-23 01:39:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2020-12-23 01:39:36,476 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 61 [2020-12-23 01:39:36,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:36,476 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2020-12-23 01:39:36,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 01:39:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2020-12-23 01:39:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 01:39:36,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:36,477 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2020-12-23 01:39:36,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 01:39:36,692 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1648029729, now seen corresponding path program 8 times [2020-12-23 01:39:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:36,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870774615] [2020-12-23 01:39:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:36,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870774615] [2020-12-23 01:39:36,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052943098] [2020-12-23 01:39:36,812 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 01:39:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:36,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:36,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:39:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933654] [2020-12-23 01:39:36,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:39:36,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:36,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:39:36,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:36,966 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand 14 states. [2020-12-23 01:39:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:37,176 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-12-23 01:39:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:39:37,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-12-23 01:39:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:37,210 INFO L225 Difference]: With dead ends: 528 [2020-12-23 01:39:37,210 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 01:39:37,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 01:39:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2020-12-23 01:39:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-23 01:39:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 346 transitions. [2020-12-23 01:39:37,224 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 346 transitions. Word has length 63 [2020-12-23 01:39:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:37,224 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 346 transitions. [2020-12-23 01:39:37,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:39:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 346 transitions. [2020-12-23 01:39:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 01:39:37,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:37,225 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 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, 1, 1, 1] [2020-12-23 01:39:37,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 01:39:37,441 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1171515080, now seen corresponding path program 9 times [2020-12-23 01:39:37,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:37,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488073376] [2020-12-23 01:39:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488073376] [2020-12-23 01:39:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071551605] [2020-12-23 01:39:37,651 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:38,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 01:39:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:39:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:38,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:38,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 01:39:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563758286] [2020-12-23 01:39:38,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 01:39:38,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 01:39:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:38,493 INFO L87 Difference]: Start difference. First operand 238 states and 346 transitions. Second operand 14 states. [2020-12-23 01:39:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:39,395 INFO L93 Difference]: Finished difference Result 654 states and 947 transitions. [2020-12-23 01:39:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 01:39:39,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-12-23 01:39:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:39,401 INFO L225 Difference]: With dead ends: 654 [2020-12-23 01:39:39,401 INFO L226 Difference]: Without dead ends: 469 [2020-12-23 01:39:39,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 01:39:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-23 01:39:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 231. [2020-12-23 01:39:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-23 01:39:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 333 transitions. [2020-12-23 01:39:39,434 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 333 transitions. Word has length 64 [2020-12-23 01:39:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:39,435 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 333 transitions. [2020-12-23 01:39:39,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 01:39:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 333 transitions. [2020-12-23 01:39:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 01:39:39,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:39,436 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2020-12-23 01:39:39,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:39,641 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:39,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1525634290, now seen corresponding path program 9 times [2020-12-23 01:39:39,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804003045] [2020-12-23 01:39:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:39,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804003045] [2020-12-23 01:39:39,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178598123] [2020-12-23 01:39:39,763 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:40,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 01:39:40,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:40,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 01:39:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:40,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:40,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:39:40,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390853399] [2020-12-23 01:39:40,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:39:40,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:39:40,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:39:40,365 INFO L87 Difference]: Start difference. First operand 231 states and 333 transitions. Second operand 15 states. [2020-12-23 01:39:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:40,620 INFO L93 Difference]: Finished difference Result 531 states and 775 transitions. [2020-12-23 01:39:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:39:40,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-23 01:39:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:40,623 INFO L225 Difference]: With dead ends: 531 [2020-12-23 01:39:40,623 INFO L226 Difference]: Without dead ends: 354 [2020-12-23 01:39:40,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:39:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-23 01:39:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 241. [2020-12-23 01:39:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 01:39:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 349 transitions. [2020-12-23 01:39:40,638 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 349 transitions. Word has length 66 [2020-12-23 01:39:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:40,638 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 349 transitions. [2020-12-23 01:39:40,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:39:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 349 transitions. [2020-12-23 01:39:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 01:39:40,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:40,640 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 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, 1, 1, 1] [2020-12-23 01:39:40,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 01:39:40,844 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1672223767, now seen corresponding path program 10 times [2020-12-23 01:39:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:40,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347224433] [2020-12-23 01:39:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347224433] [2020-12-23 01:39:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822877382] [2020-12-23 01:39:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:41,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:39:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:39:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:41,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 01:39:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257168508] [2020-12-23 01:39:41,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 01:39:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 01:39:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:39:41,330 INFO L87 Difference]: Start difference. First operand 241 states and 349 transitions. Second operand 15 states. [2020-12-23 01:39:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:42,287 INFO L93 Difference]: Finished difference Result 657 states and 950 transitions. [2020-12-23 01:39:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 01:39:42,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-12-23 01:39:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:42,291 INFO L225 Difference]: With dead ends: 657 [2020-12-23 01:39:42,291 INFO L226 Difference]: Without dead ends: 472 [2020-12-23 01:39:42,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 01:39:42,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-12-23 01:39:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 234. [2020-12-23 01:39:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-23 01:39:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 336 transitions. [2020-12-23 01:39:42,304 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 336 transitions. Word has length 67 [2020-12-23 01:39:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:42,304 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 336 transitions. [2020-12-23 01:39:42,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 01:39:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 336 transitions. [2020-12-23 01:39:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 01:39:42,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:42,305 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2020-12-23 01:39:42,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:42,519 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1670345345, now seen corresponding path program 10 times [2020-12-23 01:39:42,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:42,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626765077] [2020-12-23 01:39:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626765077] [2020-12-23 01:39:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828669079] [2020-12-23 01:39:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:42,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:39:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 01:39:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:42,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:42,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:39:42,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517124023] [2020-12-23 01:39:42,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:39:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:39:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:39:42,795 INFO L87 Difference]: Start difference. First operand 234 states and 336 transitions. Second operand 16 states. [2020-12-23 01:39:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:43,119 INFO L93 Difference]: Finished difference Result 534 states and 778 transitions. [2020-12-23 01:39:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:39:43,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-12-23 01:39:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:43,121 INFO L225 Difference]: With dead ends: 534 [2020-12-23 01:39:43,122 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 01:39:43,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:39:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 01:39:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 244. [2020-12-23 01:39:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-23 01:39:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 352 transitions. [2020-12-23 01:39:43,134 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 352 transitions. Word has length 69 [2020-12-23 01:39:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:43,134 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 352 transitions. [2020-12-23 01:39:43,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:39:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 352 transitions. [2020-12-23 01:39:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 01:39:43,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:43,136 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 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, 1, 1, 1] [2020-12-23 01:39:43,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 01:39:43,350 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1863299176, now seen corresponding path program 11 times [2020-12-23 01:39:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:43,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119253880] [2020-12-23 01:39:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119253880] [2020-12-23 01:39:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328022519] [2020-12-23 01:39:43,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:43,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 01:39:43,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 01:39:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:43,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:43,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 01:39:43,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092814032] [2020-12-23 01:39:43,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:39:43,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:39:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:39:43,889 INFO L87 Difference]: Start difference. First operand 244 states and 352 transitions. Second operand 16 states. [2020-12-23 01:39:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:44,981 INFO L93 Difference]: Finished difference Result 660 states and 953 transitions. [2020-12-23 01:39:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:39:44,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-23 01:39:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:44,985 INFO L225 Difference]: With dead ends: 660 [2020-12-23 01:39:44,985 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 01:39:44,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:39:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 01:39:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 237. [2020-12-23 01:39:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-23 01:39:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 339 transitions. [2020-12-23 01:39:44,999 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 339 transitions. Word has length 70 [2020-12-23 01:39:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:45,000 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 339 transitions. [2020-12-23 01:39:45,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:39:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 339 transitions. [2020-12-23 01:39:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 01:39:45,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:45,001 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2020-12-23 01:39:45,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:45,215 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash 610219666, now seen corresponding path program 11 times [2020-12-23 01:39:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:45,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597941503] [2020-12-23 01:39:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597941503] [2020-12-23 01:39:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107984913] [2020-12-23 01:39:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:45,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 01:39:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 01:39:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:45,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:45,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:39:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558609992] [2020-12-23 01:39:45,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:39:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:39:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:39:45,535 INFO L87 Difference]: Start difference. First operand 237 states and 339 transitions. Second operand 17 states. [2020-12-23 01:39:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:45,786 INFO L93 Difference]: Finished difference Result 537 states and 781 transitions. [2020-12-23 01:39:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:39:45,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-12-23 01:39:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:45,789 INFO L225 Difference]: With dead ends: 537 [2020-12-23 01:39:45,790 INFO L226 Difference]: Without dead ends: 360 [2020-12-23 01:39:45,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:39:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-23 01:39:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 247. [2020-12-23 01:39:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 01:39:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 355 transitions. [2020-12-23 01:39:45,803 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 355 transitions. Word has length 72 [2020-12-23 01:39:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:45,804 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 355 transitions. [2020-12-23 01:39:45,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:39:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 355 transitions. [2020-12-23 01:39:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 01:39:45,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:45,805 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 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, 1, 1, 1] [2020-12-23 01:39:46,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 01:39:46,020 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -935825801, now seen corresponding path program 12 times [2020-12-23 01:39:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:46,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478649349] [2020-12-23 01:39:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:46,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478649349] [2020-12-23 01:39:46,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735039186] [2020-12-23 01:39:46,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:47,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 01:39:47,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:39:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:47,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:47,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 01:39:47,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289864949] [2020-12-23 01:39:47,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 01:39:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 01:39:47,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:39:47,575 INFO L87 Difference]: Start difference. First operand 247 states and 355 transitions. Second operand 17 states. [2020-12-23 01:39:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:48,382 INFO L93 Difference]: Finished difference Result 663 states and 956 transitions. [2020-12-23 01:39:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 01:39:48,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-12-23 01:39:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:48,385 INFO L225 Difference]: With dead ends: 663 [2020-12-23 01:39:48,386 INFO L226 Difference]: Without dead ends: 478 [2020-12-23 01:39:48,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 14 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:39:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-23 01:39:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 240. [2020-12-23 01:39:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-23 01:39:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 342 transitions. [2020-12-23 01:39:48,402 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 342 transitions. Word has length 73 [2020-12-23 01:39:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:48,402 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 342 transitions. [2020-12-23 01:39:48,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 01:39:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 342 transitions. [2020-12-23 01:39:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 01:39:48,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:48,403 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 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] [2020-12-23 01:39:48,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:48,608 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:48,608 INFO L82 PathProgramCache]: Analyzing trace with hash -699355935, now seen corresponding path program 12 times [2020-12-23 01:39:48,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:48,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864486601] [2020-12-23 01:39:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:48,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864486601] [2020-12-23 01:39:48,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839412077] [2020-12-23 01:39:48,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:49,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 01:39:49,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 01:39:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:49,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:49,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:39:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714879813] [2020-12-23 01:39:49,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:39:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:39:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:39:49,103 INFO L87 Difference]: Start difference. First operand 240 states and 342 transitions. Second operand 18 states. [2020-12-23 01:39:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:49,341 INFO L93 Difference]: Finished difference Result 540 states and 784 transitions. [2020-12-23 01:39:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:39:49,341 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-12-23 01:39:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:49,343 INFO L225 Difference]: With dead ends: 540 [2020-12-23 01:39:49,343 INFO L226 Difference]: Without dead ends: 363 [2020-12-23 01:39:49,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:39:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-23 01:39:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 250. [2020-12-23 01:39:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-23 01:39:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 358 transitions. [2020-12-23 01:39:49,356 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 358 transitions. Word has length 75 [2020-12-23 01:39:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:49,357 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 358 transitions. [2020-12-23 01:39:49,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:39:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 358 transitions. [2020-12-23 01:39:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 01:39:49,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:49,358 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 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, 1, 1, 1] [2020-12-23 01:39:49,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 01:39:49,561 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1417003528, now seen corresponding path program 13 times [2020-12-23 01:39:49,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:49,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914952200] [2020-12-23 01:39:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:49,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914952200] [2020-12-23 01:39:49,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909199379] [2020-12-23 01:39:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 01:39:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:50,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:50,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 01:39:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043268049] [2020-12-23 01:39:50,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 01:39:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 01:39:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:39:50,244 INFO L87 Difference]: Start difference. First operand 250 states and 358 transitions. Second operand 18 states. [2020-12-23 01:39:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:51,513 INFO L93 Difference]: Finished difference Result 666 states and 959 transitions. [2020-12-23 01:39:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 01:39:51,514 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-12-23 01:39:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:51,516 INFO L225 Difference]: With dead ends: 666 [2020-12-23 01:39:51,516 INFO L226 Difference]: Without dead ends: 481 [2020-12-23 01:39:51,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 01:39:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-12-23 01:39:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 243. [2020-12-23 01:39:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-23 01:39:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 345 transitions. [2020-12-23 01:39:51,540 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 345 transitions. Word has length 76 [2020-12-23 01:39:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:51,540 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 345 transitions. [2020-12-23 01:39:51,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 01:39:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 345 transitions. [2020-12-23 01:39:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 01:39:51,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:51,541 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 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] [2020-12-23 01:39:51,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:51,755 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:51,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1216831538, now seen corresponding path program 13 times [2020-12-23 01:39:51,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:51,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709044093] [2020-12-23 01:39:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:52,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709044093] [2020-12-23 01:39:52,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890920777] [2020-12-23 01:39:52,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 01:39:52,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:52,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:52,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:39:52,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154917393] [2020-12-23 01:39:52,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:39:52,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:39:52,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:39:52,170 INFO L87 Difference]: Start difference. First operand 243 states and 345 transitions. Second operand 19 states. [2020-12-23 01:39:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:52,446 INFO L93 Difference]: Finished difference Result 543 states and 787 transitions. [2020-12-23 01:39:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:39:52,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-12-23 01:39:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:52,449 INFO L225 Difference]: With dead ends: 543 [2020-12-23 01:39:52,449 INFO L226 Difference]: Without dead ends: 366 [2020-12-23 01:39:52,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:39:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-23 01:39:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 253. [2020-12-23 01:39:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-23 01:39:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 361 transitions. [2020-12-23 01:39:52,463 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 361 transitions. Word has length 78 [2020-12-23 01:39:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:52,463 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 361 transitions. [2020-12-23 01:39:52,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:39:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 361 transitions. [2020-12-23 01:39:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 01:39:52,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:52,465 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 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, 1, 1, 1] [2020-12-23 01:39:52,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 01:39:52,678 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash 689273047, now seen corresponding path program 14 times [2020-12-23 01:39:52,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:52,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134321532] [2020-12-23 01:39:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:52,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134321532] [2020-12-23 01:39:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331225349] [2020-12-23 01:39:52,975 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:53,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 01:39:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:53,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:53,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 01:39:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671213441] [2020-12-23 01:39:53,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 01:39:53,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 01:39:53,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:39:53,589 INFO L87 Difference]: Start difference. First operand 253 states and 361 transitions. Second operand 19 states. [2020-12-23 01:39:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:54,724 INFO L93 Difference]: Finished difference Result 669 states and 962 transitions. [2020-12-23 01:39:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 01:39:54,724 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-12-23 01:39:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:54,726 INFO L225 Difference]: With dead ends: 669 [2020-12-23 01:39:54,726 INFO L226 Difference]: Without dead ends: 484 [2020-12-23 01:39:54,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 01:39:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-23 01:39:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 246. [2020-12-23 01:39:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-23 01:39:54,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 348 transitions. [2020-12-23 01:39:54,757 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 348 transitions. Word has length 79 [2020-12-23 01:39:54,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:54,757 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 348 transitions. [2020-12-23 01:39:54,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 01:39:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 348 transitions. [2020-12-23 01:39:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 01:39:54,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:54,758 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 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] [2020-12-23 01:39:54,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 01:39:54,973 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1947508545, now seen corresponding path program 14 times [2020-12-23 01:39:54,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:54,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326108204] [2020-12-23 01:39:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:55,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326108204] [2020-12-23 01:39:55,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347409364] [2020-12-23 01:39:55,189 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:55,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:39:55,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:39:55,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:55,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:55,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:39:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883972547] [2020-12-23 01:39:55,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:39:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:55,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:39:55,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:39:55,439 INFO L87 Difference]: Start difference. First operand 246 states and 348 transitions. Second operand 20 states. [2020-12-23 01:39:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:39:55,892 INFO L93 Difference]: Finished difference Result 546 states and 790 transitions. [2020-12-23 01:39:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:39:55,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-12-23 01:39:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:39:55,896 INFO L225 Difference]: With dead ends: 546 [2020-12-23 01:39:55,896 INFO L226 Difference]: Without dead ends: 369 [2020-12-23 01:39:55,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:39:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-12-23 01:39:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 256. [2020-12-23 01:39:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-23 01:39:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2020-12-23 01:39:55,926 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 81 [2020-12-23 01:39:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:39:55,926 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2020-12-23 01:39:55,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:39:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2020-12-23 01:39:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 01:39:55,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:39:55,929 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 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, 1, 1, 1] [2020-12-23 01:39:56,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 01:39:56,144 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:39:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:39:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1865423784, now seen corresponding path program 15 times [2020-12-23 01:39:56,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:39:56,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685541979] [2020-12-23 01:39:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:39:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:39:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:56,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685541979] [2020-12-23 01:39:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089579967] [2020-12-23 01:39:56,454 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:39:59,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 01:39:59,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:39:59,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 01:39:59,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:39:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:39:59,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:39:59,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 01:39:59,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873342327] [2020-12-23 01:39:59,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 01:39:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:39:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 01:39:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:39:59,911 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand 20 states. [2020-12-23 01:40:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:00,923 INFO L93 Difference]: Finished difference Result 672 states and 965 transitions. [2020-12-23 01:40:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 01:40:00,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-12-23 01:40:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:00,926 INFO L225 Difference]: With dead ends: 672 [2020-12-23 01:40:00,926 INFO L226 Difference]: Without dead ends: 487 [2020-12-23 01:40:00,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 01:40:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-12-23 01:40:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 249. [2020-12-23 01:40:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-23 01:40:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 351 transitions. [2020-12-23 01:40:00,942 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 351 transitions. Word has length 82 [2020-12-23 01:40:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:00,942 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 351 transitions. [2020-12-23 01:40:00,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 01:40:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 351 transitions. [2020-12-23 01:40:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 01:40:00,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:00,943 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 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] [2020-12-23 01:40:01,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 01:40:01,149 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1642999342, now seen corresponding path program 15 times [2020-12-23 01:40:01,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:01,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044870676] [2020-12-23 01:40:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044870676] [2020-12-23 01:40:01,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069375129] [2020-12-23 01:40:01,378 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:01,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 01:40:01,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 01:40:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:01,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:01,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:40:01,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794704666] [2020-12-23 01:40:01,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:40:01,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:40:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:01,593 INFO L87 Difference]: Start difference. First operand 249 states and 351 transitions. Second operand 21 states. [2020-12-23 01:40:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:02,042 INFO L93 Difference]: Finished difference Result 549 states and 793 transitions. [2020-12-23 01:40:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:40:02,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-12-23 01:40:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:02,045 INFO L225 Difference]: With dead ends: 549 [2020-12-23 01:40:02,045 INFO L226 Difference]: Without dead ends: 372 [2020-12-23 01:40:02,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-23 01:40:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 259. [2020-12-23 01:40:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 01:40:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 367 transitions. [2020-12-23 01:40:02,060 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 367 transitions. Word has length 84 [2020-12-23 01:40:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:02,060 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 367 transitions. [2020-12-23 01:40:02,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:40:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 367 transitions. [2020-12-23 01:40:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 01:40:02,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:02,062 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 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, 1, 1, 1] [2020-12-23 01:40:02,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:02,276 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2066138313, now seen corresponding path program 16 times [2020-12-23 01:40:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:02,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319178550] [2020-12-23 01:40:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319178550] [2020-12-23 01:40:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881408402] [2020-12-23 01:40:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:02,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 01:40:02,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:03,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:03,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 01:40:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734207849] [2020-12-23 01:40:03,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 01:40:03,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 01:40:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:03,280 INFO L87 Difference]: Start difference. First operand 259 states and 367 transitions. Second operand 21 states. [2020-12-23 01:40:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:04,858 INFO L93 Difference]: Finished difference Result 675 states and 968 transitions. [2020-12-23 01:40:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 01:40:04,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-12-23 01:40:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:04,864 INFO L225 Difference]: With dead ends: 675 [2020-12-23 01:40:04,865 INFO L226 Difference]: Without dead ends: 490 [2020-12-23 01:40:04,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 01:40:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-23 01:40:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 252. [2020-12-23 01:40:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-23 01:40:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 354 transitions. [2020-12-23 01:40:04,880 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 354 transitions. Word has length 85 [2020-12-23 01:40:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:04,881 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 354 transitions. [2020-12-23 01:40:04,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 01:40:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 354 transitions. [2020-12-23 01:40:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 01:40:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:04,882 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 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] [2020-12-23 01:40:05,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 01:40:05,097 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash -302954079, now seen corresponding path program 16 times [2020-12-23 01:40:05,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:05,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076261453] [2020-12-23 01:40:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:05,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076261453] [2020-12-23 01:40:05,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005195100] [2020-12-23 01:40:05,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:05,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 01:40:05,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 01:40:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622211105] [2020-12-23 01:40:05,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:40:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:40:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:40:05,581 INFO L87 Difference]: Start difference. First operand 252 states and 354 transitions. Second operand 22 states. [2020-12-23 01:40:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:05,847 INFO L93 Difference]: Finished difference Result 552 states and 796 transitions. [2020-12-23 01:40:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:40:05,848 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-12-23 01:40:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:05,850 INFO L225 Difference]: With dead ends: 552 [2020-12-23 01:40:05,850 INFO L226 Difference]: Without dead ends: 375 [2020-12-23 01:40:05,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:40:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-23 01:40:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 262. [2020-12-23 01:40:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 01:40:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 370 transitions. [2020-12-23 01:40:05,866 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 370 transitions. Word has length 87 [2020-12-23 01:40:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:05,867 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 370 transitions. [2020-12-23 01:40:05,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:40:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 370 transitions. [2020-12-23 01:40:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 01:40:05,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:05,868 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 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, 1, 1, 1] [2020-12-23 01:40:06,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 01:40:06,082 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash 820559176, now seen corresponding path program 17 times [2020-12-23 01:40:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:06,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992088656] [2020-12-23 01:40:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:06,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992088656] [2020-12-23 01:40:06,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017951194] [2020-12-23 01:40:06,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:06,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 01:40:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 01:40:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:07,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:07,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 01:40:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111655927] [2020-12-23 01:40:07,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 01:40:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 01:40:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:40:07,136 INFO L87 Difference]: Start difference. First operand 262 states and 370 transitions. Second operand 22 states. [2020-12-23 01:40:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:08,875 INFO L93 Difference]: Finished difference Result 678 states and 971 transitions. [2020-12-23 01:40:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 01:40:08,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-12-23 01:40:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:08,878 INFO L225 Difference]: With dead ends: 678 [2020-12-23 01:40:08,878 INFO L226 Difference]: Without dead ends: 493 [2020-12-23 01:40:08,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 01:40:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-12-23 01:40:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 255. [2020-12-23 01:40:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-23 01:40:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 357 transitions. [2020-12-23 01:40:08,895 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 357 transitions. Word has length 88 [2020-12-23 01:40:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:08,895 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 357 transitions. [2020-12-23 01:40:08,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 01:40:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 357 transitions. [2020-12-23 01:40:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 01:40:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:08,896 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 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] [2020-12-23 01:40:09,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:09,111 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash -735540366, now seen corresponding path program 17 times [2020-12-23 01:40:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:09,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023013614] [2020-12-23 01:40:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:09,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023013614] [2020-12-23 01:40:09,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288218374] [2020-12-23 01:40:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:09,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-23 01:40:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 01:40:09,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:09,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:09,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 01:40:09,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959773641] [2020-12-23 01:40:09,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:40:09,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:40:09,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:09,576 INFO L87 Difference]: Start difference. First operand 255 states and 357 transitions. Second operand 23 states. [2020-12-23 01:40:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:10,089 INFO L93 Difference]: Finished difference Result 555 states and 799 transitions. [2020-12-23 01:40:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:40:10,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-12-23 01:40:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:10,092 INFO L225 Difference]: With dead ends: 555 [2020-12-23 01:40:10,092 INFO L226 Difference]: Without dead ends: 378 [2020-12-23 01:40:10,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-12-23 01:40:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 265. [2020-12-23 01:40:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-23 01:40:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 373 transitions. [2020-12-23 01:40:10,126 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 373 transitions. Word has length 90 [2020-12-23 01:40:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:10,126 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 373 transitions. [2020-12-23 01:40:10,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:40:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 373 transitions. [2020-12-23 01:40:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 01:40:10,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:10,128 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 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, 1, 1, 1] [2020-12-23 01:40:10,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 01:40:10,342 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash 295286167, now seen corresponding path program 18 times [2020-12-23 01:40:10,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:10,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693663152] [2020-12-23 01:40:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:10,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693663152] [2020-12-23 01:40:10,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321489329] [2020-12-23 01:40:10,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:11,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 01:40:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 01:40:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:12,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 01:40:12,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412573291] [2020-12-23 01:40:12,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 01:40:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 01:40:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:12,172 INFO L87 Difference]: Start difference. First operand 265 states and 373 transitions. Second operand 23 states. [2020-12-23 01:40:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:13,369 INFO L93 Difference]: Finished difference Result 681 states and 974 transitions. [2020-12-23 01:40:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 01:40:13,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-12-23 01:40:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:13,372 INFO L225 Difference]: With dead ends: 681 [2020-12-23 01:40:13,372 INFO L226 Difference]: Without dead ends: 496 [2020-12-23 01:40:13,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 01:40:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-12-23 01:40:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 258. [2020-12-23 01:40:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-23 01:40:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 360 transitions. [2020-12-23 01:40:13,390 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 360 transitions. Word has length 91 [2020-12-23 01:40:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 360 transitions. [2020-12-23 01:40:13,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 01:40:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 360 transitions. [2020-12-23 01:40:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 01:40:13,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:13,391 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 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] [2020-12-23 01:40:13,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:13,595 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1283238913, now seen corresponding path program 18 times [2020-12-23 01:40:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:13,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003009491] [2020-12-23 01:40:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:13,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003009491] [2020-12-23 01:40:13,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000990521] [2020-12-23 01:40:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:14,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 01:40:14,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 01:40:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:14,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 01:40:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618789767] [2020-12-23 01:40:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:40:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:40:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:40:14,255 INFO L87 Difference]: Start difference. First operand 258 states and 360 transitions. Second operand 24 states. [2020-12-23 01:40:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:14,662 INFO L93 Difference]: Finished difference Result 558 states and 802 transitions. [2020-12-23 01:40:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:40:14,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-12-23 01:40:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:14,665 INFO L225 Difference]: With dead ends: 558 [2020-12-23 01:40:14,665 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 01:40:14,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:40:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 01:40:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 268. [2020-12-23 01:40:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-12-23 01:40:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 376 transitions. [2020-12-23 01:40:14,685 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 376 transitions. Word has length 93 [2020-12-23 01:40:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:14,685 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 376 transitions. [2020-12-23 01:40:14,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:40:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 376 transitions. [2020-12-23 01:40:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 01:40:14,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:14,687 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 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, 1, 1, 1] [2020-12-23 01:40:14,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 01:40:14,891 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1547065624, now seen corresponding path program 19 times [2020-12-23 01:40:14,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:14,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473066102] [2020-12-23 01:40:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473066102] [2020-12-23 01:40:15,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410807983] [2020-12-23 01:40:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:15,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 01:40:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:16,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:16,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 01:40:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593632771] [2020-12-23 01:40:16,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 01:40:16,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 01:40:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:40:16,180 INFO L87 Difference]: Start difference. First operand 268 states and 376 transitions. Second operand 24 states. [2020-12-23 01:40:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:17,787 INFO L93 Difference]: Finished difference Result 684 states and 977 transitions. [2020-12-23 01:40:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 01:40:17,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2020-12-23 01:40:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:17,789 INFO L225 Difference]: With dead ends: 684 [2020-12-23 01:40:17,789 INFO L226 Difference]: Without dead ends: 499 [2020-12-23 01:40:17,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 19 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 01:40:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-23 01:40:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 261. [2020-12-23 01:40:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-23 01:40:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 363 transitions. [2020-12-23 01:40:17,808 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 363 transitions. Word has length 94 [2020-12-23 01:40:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:17,808 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 363 transitions. [2020-12-23 01:40:17,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 01:40:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 363 transitions. [2020-12-23 01:40:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 01:40:17,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:17,809 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 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] [2020-12-23 01:40:18,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:18,025 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash 309693714, now seen corresponding path program 19 times [2020-12-23 01:40:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:18,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528872513] [2020-12-23 01:40:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:18,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528872513] [2020-12-23 01:40:18,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099808386] [2020-12-23 01:40:18,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 01:40:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:18,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:18,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 01:40:18,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87482608] [2020-12-23 01:40:18,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:40:18,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:18,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:40:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:18,541 INFO L87 Difference]: Start difference. First operand 261 states and 363 transitions. Second operand 25 states. [2020-12-23 01:40:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:18,844 INFO L93 Difference]: Finished difference Result 561 states and 805 transitions. [2020-12-23 01:40:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:40:18,845 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-12-23 01:40:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:18,847 INFO L225 Difference]: With dead ends: 561 [2020-12-23 01:40:18,847 INFO L226 Difference]: Without dead ends: 384 [2020-12-23 01:40:18,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-23 01:40:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 271. [2020-12-23 01:40:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 01:40:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 379 transitions. [2020-12-23 01:40:18,864 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 379 transitions. Word has length 96 [2020-12-23 01:40:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:18,864 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 379 transitions. [2020-12-23 01:40:18,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:40:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 379 transitions. [2020-12-23 01:40:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 01:40:18,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:18,866 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 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, 1, 1, 1] [2020-12-23 01:40:19,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 01:40:19,079 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1662195721, now seen corresponding path program 20 times [2020-12-23 01:40:19,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:19,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670197484] [2020-12-23 01:40:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:19,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670197484] [2020-12-23 01:40:19,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034699493] [2020-12-23 01:40:19,560 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:19,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 01:40:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:20,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:20,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 01:40:20,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917846992] [2020-12-23 01:40:20,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 01:40:20,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:20,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 01:40:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:20,553 INFO L87 Difference]: Start difference. First operand 271 states and 379 transitions. Second operand 25 states. [2020-12-23 01:40:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:22,694 INFO L93 Difference]: Finished difference Result 687 states and 980 transitions. [2020-12-23 01:40:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 01:40:22,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-12-23 01:40:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:22,700 INFO L225 Difference]: With dead ends: 687 [2020-12-23 01:40:22,700 INFO L226 Difference]: Without dead ends: 502 [2020-12-23 01:40:22,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 01:40:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-23 01:40:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 264. [2020-12-23 01:40:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-23 01:40:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 366 transitions. [2020-12-23 01:40:22,721 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 366 transitions. Word has length 97 [2020-12-23 01:40:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:22,721 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 366 transitions. [2020-12-23 01:40:22,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 01:40:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 366 transitions. [2020-12-23 01:40:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 01:40:22,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:22,722 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 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] [2020-12-23 01:40:22,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 01:40:22,923 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1338820193, now seen corresponding path program 20 times [2020-12-23 01:40:22,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:22,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992881399] [2020-12-23 01:40:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:23,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992881399] [2020-12-23 01:40:23,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946346540] [2020-12-23 01:40:23,284 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:23,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:40:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 01:40:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:23,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:23,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 01:40:23,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776183309] [2020-12-23 01:40:23,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:40:23,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:40:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:40:23,504 INFO L87 Difference]: Start difference. First operand 264 states and 366 transitions. Second operand 26 states. [2020-12-23 01:40:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:23,812 INFO L93 Difference]: Finished difference Result 564 states and 808 transitions. [2020-12-23 01:40:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:40:23,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-12-23 01:40:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:23,815 INFO L225 Difference]: With dead ends: 564 [2020-12-23 01:40:23,815 INFO L226 Difference]: Without dead ends: 387 [2020-12-23 01:40:23,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:40:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-12-23 01:40:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 274. [2020-12-23 01:40:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-23 01:40:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2020-12-23 01:40:23,834 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 99 [2020-12-23 01:40:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:23,835 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2020-12-23 01:40:23,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:40:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2020-12-23 01:40:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 01:40:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:23,836 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 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, 1, 1, 1] [2020-12-23 01:40:24,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:24,050 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash 175954056, now seen corresponding path program 21 times [2020-12-23 01:40:24,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:24,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805217888] [2020-12-23 01:40:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:24,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805217888] [2020-12-23 01:40:24,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533982726] [2020-12-23 01:40:24,573 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:25,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 01:40:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:25,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 01:40:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:26,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:26,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 01:40:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872908531] [2020-12-23 01:40:26,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 01:40:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 01:40:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:40:26,235 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 26 states. [2020-12-23 01:40:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:27,912 INFO L93 Difference]: Finished difference Result 690 states and 983 transitions. [2020-12-23 01:40:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 01:40:27,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2020-12-23 01:40:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:27,915 INFO L225 Difference]: With dead ends: 690 [2020-12-23 01:40:27,915 INFO L226 Difference]: Without dead ends: 505 [2020-12-23 01:40:27,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 79 SyntacticMatches, 22 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 01:40:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-12-23 01:40:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 267. [2020-12-23 01:40:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 01:40:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 369 transitions. [2020-12-23 01:40:27,935 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 369 transitions. Word has length 100 [2020-12-23 01:40:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:27,935 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 369 transitions. [2020-12-23 01:40:27,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 01:40:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 369 transitions. [2020-12-23 01:40:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 01:40:27,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:27,937 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 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] [2020-12-23 01:40:28,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 01:40:28,141 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1725770062, now seen corresponding path program 21 times [2020-12-23 01:40:28,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:28,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260066554] [2020-12-23 01:40:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260066554] [2020-12-23 01:40:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841887803] [2020-12-23 01:40:28,532 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:28,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-23 01:40:28,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 01:40:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:29,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:29,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 01:40:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433863528] [2020-12-23 01:40:29,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:40:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:40:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:29,015 INFO L87 Difference]: Start difference. First operand 267 states and 369 transitions. Second operand 27 states. [2020-12-23 01:40:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:29,345 INFO L93 Difference]: Finished difference Result 567 states and 811 transitions. [2020-12-23 01:40:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:40:29,346 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-12-23 01:40:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:29,348 INFO L225 Difference]: With dead ends: 567 [2020-12-23 01:40:29,348 INFO L226 Difference]: Without dead ends: 390 [2020-12-23 01:40:29,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-23 01:40:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 277. [2020-12-23 01:40:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 01:40:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 385 transitions. [2020-12-23 01:40:29,364 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 385 transitions. Word has length 102 [2020-12-23 01:40:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:29,365 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 385 transitions. [2020-12-23 01:40:29,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:40:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 385 transitions. [2020-12-23 01:40:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 01:40:29,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:29,366 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 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, 1, 1, 1] [2020-12-23 01:40:29,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:29,570 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -337063337, now seen corresponding path program 22 times [2020-12-23 01:40:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:29,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066945387] [2020-12-23 01:40:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:30,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066945387] [2020-12-23 01:40:30,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217751023] [2020-12-23 01:40:30,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:30,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 01:40:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:31,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:31,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 01:40:31,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112402377] [2020-12-23 01:40:31,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 01:40:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 01:40:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:31,202 INFO L87 Difference]: Start difference. First operand 277 states and 385 transitions. Second operand 27 states. [2020-12-23 01:40:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:33,641 INFO L93 Difference]: Finished difference Result 693 states and 986 transitions. [2020-12-23 01:40:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 01:40:33,642 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-12-23 01:40:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:33,644 INFO L225 Difference]: With dead ends: 693 [2020-12-23 01:40:33,644 INFO L226 Difference]: Without dead ends: 508 [2020-12-23 01:40:33,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 01:40:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-12-23 01:40:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 270. [2020-12-23 01:40:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-23 01:40:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 372 transitions. [2020-12-23 01:40:33,663 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 372 transitions. Word has length 103 [2020-12-23 01:40:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:33,663 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 372 transitions. [2020-12-23 01:40:33,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 01:40:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 372 transitions. [2020-12-23 01:40:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 01:40:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:33,664 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 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] [2020-12-23 01:40:33,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:33,880 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash -814245695, now seen corresponding path program 22 times [2020-12-23 01:40:33,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:33,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490012440] [2020-12-23 01:40:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:40:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:34,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490012440] [2020-12-23 01:40:34,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589837964] [2020-12-23 01:40:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:40:34,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 01:40:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:40:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 01:40:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:40:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:40:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 01:40:34,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 01:40:34,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823348821] [2020-12-23 01:40:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 01:40:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:40:34,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 01:40:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:40:34,525 INFO L87 Difference]: Start difference. First operand 270 states and 372 transitions. Second operand 28 states. [2020-12-23 01:40:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:40:35,175 INFO L93 Difference]: Finished difference Result 570 states and 814 transitions. [2020-12-23 01:40:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 01:40:35,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2020-12-23 01:40:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:40:35,177 INFO L225 Difference]: With dead ends: 570 [2020-12-23 01:40:35,177 INFO L226 Difference]: Without dead ends: 393 [2020-12-23 01:40:35,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 01:40:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-12-23 01:40:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 280. [2020-12-23 01:40:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-12-23 01:40:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 388 transitions. [2020-12-23 01:40:35,197 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 388 transitions. Word has length 105 [2020-12-23 01:40:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:40:35,197 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 388 transitions. [2020-12-23 01:40:35,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 01:40:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 388 transitions. [2020-12-23 01:40:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 01:40:35,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:40:35,198 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 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, 1, 1, 1] [2020-12-23 01:40:35,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 01:40:35,413 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:40:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:40:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2144579032, now seen corresponding path program 23 times [2020-12-23 01:40:35,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:40:35,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423856825] [2020-12-23 01:40:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:40:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:40:35,464 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:40:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:40:35,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:40:35,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:40:35,594 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:40:35,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-12-23 01:40:35,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:40:35 BoogieIcfgContainer [2020-12-23 01:40:35,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:40:35,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:40:35,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:40:35,736 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:40:35,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:39:17" (3/4) ... [2020-12-23 01:40:35,741 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 01:40:35,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:40:35,743 INFO L168 Benchmark]: Toolchain (without parser) took 79861.46 ms. Allocated memory was 160.4 MB in the beginning and 369.1 MB in the end (delta: 208.7 MB). Free memory was 137.1 MB in the beginning and 146.8 MB in the end (delta: -9.7 MB). Peak memory consumption was 199.9 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,745 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 160.4 MB. Free memory is still 141.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:40:35,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.44 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 123.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.15 ms. Allocated memory is still 160.4 MB. Free memory was 123.2 MB in the beginning and 120.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,747 INFO L168 Benchmark]: Boogie Preprocessor took 105.14 ms. Allocated memory is still 160.4 MB. Free memory was 120.1 MB in the beginning and 117.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,747 INFO L168 Benchmark]: RCFGBuilder took 1056.43 ms. Allocated memory is still 160.4 MB. Free memory was 117.4 MB in the beginning and 132.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,748 INFO L168 Benchmark]: TraceAbstraction took 78174.98 ms. Allocated memory was 160.4 MB in the beginning and 369.1 MB in the end (delta: 208.7 MB). Free memory was 132.2 MB in the beginning and 147.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 194.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:40:35,748 INFO L168 Benchmark]: Witness Printer took 5.66 ms. Allocated memory is still 369.1 MB. Free memory was 147.4 MB in the beginning and 146.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:40:35,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 160.4 MB. Free memory is still 141.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 417.44 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 123.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 84.15 ms. Allocated memory is still 160.4 MB. Free memory was 123.2 MB in the beginning and 120.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 105.14 ms. Allocated memory is still 160.4 MB. Free memory was 120.1 MB in the beginning and 117.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1056.43 ms. Allocated memory is still 160.4 MB. Free memory was 117.4 MB in the beginning and 132.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 78174.98 ms. Allocated memory was 160.4 MB in the beginning and 369.1 MB in the end (delta: 208.7 MB). Free memory was 132.2 MB in the beginning and 147.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 194.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.66 ms. Allocated memory is still 369.1 MB. Free memory was 147.4 MB in the beginning and 146.8 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 68. Possible FailurePath: [L213] unsigned int a ; [L214] unsigned int ma = __VERIFIER_nondet_uint(); [L215] signed char ea = __VERIFIER_nondet_char(); [L216] unsigned int b ; [L217] unsigned int mb = __VERIFIER_nondet_uint(); [L218] signed char eb = __VERIFIER_nondet_char(); [L219] unsigned int r_mul ; [L220] unsigned int zero ; [L221] unsigned int one ; [L222] int sb ; [L223] int tmp ; [L224] int tmp___0 ; [L225] int tmp___1 ; [L226] int __retres16 ; [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND TRUE ! m [L22] __retres4 = 0U [L72] return (__retres4); [L230] zero = base2flt(0, 0) [L17] unsigned int res ; [L18] unsigned int __retres4 ; [L21] COND FALSE !(! m) [L27] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND TRUE m < 1U << 24U [L29] COND TRUE 1 [L31] COND FALSE !(e <= -128) [L37] e = e - 1 [L38] m = m << 1U [L39] COND FALSE !(m < 1U << 24U) [L68] m = m & ~ (1U << 24U) [L69] res = m | ((unsigned int )(e + 128) << 24U) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L70] __retres4 = res VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L72] return (__retres4); VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L231] one = base2flt(1, 0) [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L21] COND FALSE !(! m) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L27] COND FALSE !(m < 1U << 24U) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L49] COND TRUE 1 VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L51] COND TRUE m >= 1U << 25U VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L56] COND TRUE e >= 127 [L57] __retres4 = 4294967295U VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L72] return (__retres4); VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L232] a = base2flt(ma, ea) [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L21] COND TRUE ! m [L22] __retres4 = 0U VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L72] return (__retres4); VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L233] b = base2flt(mb, eb) [L140] unsigned int res ; [L141] unsigned int ma ; [L142] unsigned int mb ; [L143] unsigned long long accu ; [L144] int ea ; [L145] int eb ; [L146] unsigned int tmp ; [L147] unsigned int __retres10 ; VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L150] COND FALSE !(a < b) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L157] COND TRUE ! b [L158] __retres10 = 0U VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L209] return (__retres10); VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L234] r_mul = mulflt(a, b) [L236] COND FALSE !(b < one) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L239] COND FALSE !(b > one) [L242] tmp = 0 VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L244] sb = tmp VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L246] COND TRUE sb == 0 VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L247] COND TRUE r_mul < a [L248] tmp___1 = -1 VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L8] COND TRUE !(cond) VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] [L9] reach_error() VAL [res = m | ((unsigned int )(e + 128) << 24U)=1744830464] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 77.9s, OverallIterations: 56, TraceHistogramMax: 25, AutomataDifference: 32.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13060 SDtfs, 9629 SDslu, 103796 SDs, 0 SdLazy, 41597 SolverSat, 998 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4113 GetRequests, 3136 SyntacticMatches, 260 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=280occurred in iteration=55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 55 MinimizatonAttempts, 8496 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 10.9s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 7014 NumberOfCodeBlocks, 7008 NumberOfCodeBlocksAsserted, 375 NumberOfCheckSat, 6804 ConstructedInterpolants, 0 QuantifiedInterpolants, 1918054 SizeOfPredicates, 85 NumberOfNonLiveVariables, 11400 ConjunctsInSsa, 1089 ConjunctsInUnsatCore, 104 InterpolantComputations, 9 PerfectInterpolantSequences, 16/27173 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...