/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-178dd20 [2021-01-06 11:33:07,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:33:07,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:33:07,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:33:07,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:33:07,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:33:07,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:33:07,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:33:07,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:33:07,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:33:07,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:33:07,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:33:07,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:33:07,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:33:07,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:33:07,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:33:07,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:33:07,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:33:07,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:33:07,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:33:07,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:33:07,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:33:07,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:33:07,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:33:07,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 11:33:07,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 11:33:07,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 11:33:07,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 11:33:07,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 11:33:07,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 11:33:07,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:33:07,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:33:07,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:33:07,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:33:07,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:33:07,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:33:07,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:33:07,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:33:07,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:33:07,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:33:07,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:33:07,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:33:07,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:33:07,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:33:07,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:33:07,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:33:07,673 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:33:07,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:33:07,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:33:07,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:33:07,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:33:07,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:33:07,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:33:07,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:33:07,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:33:07,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:33:07,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:33:07,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:33:07,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:33:07,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:33:07,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:33:07,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:33:07,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:33:07,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:33:07,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:33:07,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:33:07,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:33:07,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:33:08,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:33:08,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:33:08,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:33:08,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:33:08,084 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:33:08,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-01-06 11:33:08,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d04ee0d4/b0d8f502bce04e89ba01face5608d7ee/FLAG2cbd26d9c [2021-01-06 11:33:08,854 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:33:08,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-01-06 11:33:08,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d04ee0d4/b0d8f502bce04e89ba01face5608d7ee/FLAG2cbd26d9c [2021-01-06 11:33:09,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d04ee0d4/b0d8f502bce04e89ba01face5608d7ee [2021-01-06 11:33:09,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:33:09,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:33:09,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:33:09,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:33:09,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:33:09,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17cce94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09, skipping insertion in model container [2021-01-06 11:33:09,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:33:09,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:33:09,392 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,] [2021-01-06 11:33:09,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:33:09,469 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:33:09,483 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,] [2021-01-06 11:33:09,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:33:09,560 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:33:09,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09 WrapperNode [2021-01-06 11:33:09,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:33:09,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:33:09,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:33:09,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:33:09,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:33:09,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:33:09,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:33:09,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:33:09,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... [2021-01-06 11:33:09,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:33:09,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:33:09,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:33:09,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:33:09,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:33:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:33:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:33:09,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:33:09,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:33:10,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:33:10,710 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-01-06 11:33:10,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:33:10 BoogieIcfgContainer [2021-01-06 11:33:10,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:33:10,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:33:10,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:33:10,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:33:10,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:33:09" (1/3) ... [2021-01-06 11:33:10,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b9233c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:33:10, skipping insertion in model container [2021-01-06 11:33:10,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:33:09" (2/3) ... [2021-01-06 11:33:10,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b9233c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:33:10, skipping insertion in model container [2021-01-06 11:33:10,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:33:10" (3/3) ... [2021-01-06 11:33:10,721 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2021-01-06 11:33:10,728 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:33:10,734 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:33:10,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:33:10,783 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:33:10,783 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:33:10,783 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:33:10,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:33:10,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:33:10,783 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:33:10,784 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:33:10,784 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:33:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2021-01-06 11:33:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 11:33:10,811 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:10,812 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] [2021-01-06 11:33:10,813 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1207621879, now seen corresponding path program 1 times [2021-01-06 11:33:10,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:10,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908333066] [2021-01-06 11:33:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908333066] [2021-01-06 11:33:11,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:11,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:33:11,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932201389] [2021-01-06 11:33:11,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:33:11,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:33:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,089 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 3 states. [2021-01-06 11:33:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:11,151 INFO L93 Difference]: Finished difference Result 257 states and 463 transitions. [2021-01-06 11:33:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:33:11,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-01-06 11:33:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:11,167 INFO L225 Difference]: With dead ends: 257 [2021-01-06 11:33:11,167 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 11:33:11,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 11:33:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-01-06 11:33:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 11:33:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 206 transitions. [2021-01-06 11:33:11,220 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 206 transitions. Word has length 24 [2021-01-06 11:33:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:11,221 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 206 transitions. [2021-01-06 11:33:11,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:33:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 206 transitions. [2021-01-06 11:33:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:33:11,223 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:11,224 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] [2021-01-06 11:33:11,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:33:11,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:11,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1350279153, now seen corresponding path program 1 times [2021-01-06 11:33:11,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:11,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093147024] [2021-01-06 11:33:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093147024] [2021-01-06 11:33:11,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:11,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:33:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973868668] [2021-01-06 11:33:11,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:33:11,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:11,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:33:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:33:11,344 INFO L87 Difference]: Start difference. First operand 127 states and 206 transitions. Second operand 4 states. [2021-01-06 11:33:11,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:11,402 INFO L93 Difference]: Finished difference Result 136 states and 216 transitions. [2021-01-06 11:33:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:33:11,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-01-06 11:33:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:11,410 INFO L225 Difference]: With dead ends: 136 [2021-01-06 11:33:11,410 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 11:33:11,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:33:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 11:33:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-01-06 11:33:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 11:33:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 205 transitions. [2021-01-06 11:33:11,439 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 205 transitions. Word has length 26 [2021-01-06 11:33:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:11,440 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 205 transitions. [2021-01-06 11:33:11,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:33:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 205 transitions. [2021-01-06 11:33:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:33:11,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:11,444 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] [2021-01-06 11:33:11,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:33:11,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1169680781, now seen corresponding path program 1 times [2021-01-06 11:33:11,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:11,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696473047] [2021-01-06 11:33:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:11,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696473047] [2021-01-06 11:33:11,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:11,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:33:11,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237463573] [2021-01-06 11:33:11,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:33:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:33:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,531 INFO L87 Difference]: Start difference. First operand 127 states and 205 transitions. Second operand 3 states. [2021-01-06 11:33:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:11,759 INFO L93 Difference]: Finished difference Result 288 states and 447 transitions. [2021-01-06 11:33:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:33:11,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-01-06 11:33:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:11,763 INFO L225 Difference]: With dead ends: 288 [2021-01-06 11:33:11,764 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 11:33:11,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 11:33:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-01-06 11:33:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 11:33:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 198 transitions. [2021-01-06 11:33:11,791 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 198 transitions. Word has length 26 [2021-01-06 11:33:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:11,792 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 198 transitions. [2021-01-06 11:33:11,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:33:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 198 transitions. [2021-01-06 11:33:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:33:11,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:11,794 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] [2021-01-06 11:33:11,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:33:11,794 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:11,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2012799916, now seen corresponding path program 1 times [2021-01-06 11:33:11,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:11,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449809783] [2021-01-06 11:33:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:11,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449809783] [2021-01-06 11:33:11,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:11,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:33:11,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044588339] [2021-01-06 11:33:11,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:33:11,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:11,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:33:11,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,840 INFO L87 Difference]: Start difference. First operand 124 states and 198 transitions. Second operand 3 states. [2021-01-06 11:33:11,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:11,926 INFO L93 Difference]: Finished difference Result 248 states and 394 transitions. [2021-01-06 11:33:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:33:11,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-01-06 11:33:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:11,928 INFO L225 Difference]: With dead ends: 248 [2021-01-06 11:33:11,928 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 11:33:11,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:33:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 11:33:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-01-06 11:33:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 11:33:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 217 transitions. [2021-01-06 11:33:11,939 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 217 transitions. Word has length 29 [2021-01-06 11:33:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:11,939 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 217 transitions. [2021-01-06 11:33:11,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:33:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 217 transitions. [2021-01-06 11:33:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:33:11,941 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:11,941 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] [2021-01-06 11:33:11,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 11:33:11,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:11,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1475279515, now seen corresponding path program 1 times [2021-01-06 11:33:11,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:11,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051984652] [2021-01-06 11:33:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051984652] [2021-01-06 11:33:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705815289] [2021-01-06 11:33:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:33:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:12,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:12,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:33:12,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966834576] [2021-01-06 11:33:12,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:33:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:33:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:33:12,174 INFO L87 Difference]: Start difference. First operand 138 states and 217 transitions. Second operand 5 states. [2021-01-06 11:33:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:12,339 INFO L93 Difference]: Finished difference Result 342 states and 532 transitions. [2021-01-06 11:33:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:33:12,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2021-01-06 11:33:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:12,342 INFO L225 Difference]: With dead ends: 342 [2021-01-06 11:33:12,342 INFO L226 Difference]: Without dead ends: 234 [2021-01-06 11:33:12,343 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 [2021-01-06 11:33:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-01-06 11:33:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2021-01-06 11:33:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 11:33:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 236 transitions. [2021-01-06 11:33:12,375 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 236 transitions. Word has length 32 [2021-01-06 11:33:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:12,375 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 236 transitions. [2021-01-06 11:33:12,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:33:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 236 transitions. [2021-01-06 11:33:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:33:12,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:12,379 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] [2021-01-06 11:33:12,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:12,600 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash 156907188, now seen corresponding path program 2 times [2021-01-06 11:33:12,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:12,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228906288] [2021-01-06 11:33:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228906288] [2021-01-06 11:33:12,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293882871] [2021-01-06 11:33:12,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:12,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 11:33:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:33:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 11:33:12,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:33:12,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-01-06 11:33:12,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914212064] [2021-01-06 11:33:12,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:33:12,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:33:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:12,866 INFO L87 Difference]: Start difference. First operand 151 states and 236 transitions. Second operand 6 states. [2021-01-06 11:33:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:13,185 INFO L93 Difference]: Finished difference Result 430 states and 647 transitions. [2021-01-06 11:33:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:33:13,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2021-01-06 11:33:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:13,187 INFO L225 Difference]: With dead ends: 430 [2021-01-06 11:33:13,188 INFO L226 Difference]: Without dead ends: 282 [2021-01-06 11:33:13,189 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 [2021-01-06 11:33:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-01-06 11:33:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 127. [2021-01-06 11:33:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 11:33:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 192 transitions. [2021-01-06 11:33:13,195 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 192 transitions. Word has length 35 [2021-01-06 11:33:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:13,196 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 192 transitions. [2021-01-06 11:33:13,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:33:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 192 transitions. [2021-01-06 11:33:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:33:13,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:13,197 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] [2021-01-06 11:33:13,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:13,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 415072626, now seen corresponding path program 1 times [2021-01-06 11:33:13,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:13,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269809430] [2021-01-06 11:33:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:13,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269809430] [2021-01-06 11:33:13,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495482586] [2021-01-06 11:33:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:33:13,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:13,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:13,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:33:13,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695291790] [2021-01-06 11:33:13,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:33:13,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:13,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:33:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:33:13,612 INFO L87 Difference]: Start difference. First operand 127 states and 192 transitions. Second operand 6 states. [2021-01-06 11:33:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:13,740 INFO L93 Difference]: Finished difference Result 295 states and 443 transitions. [2021-01-06 11:33:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:33:13,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2021-01-06 11:33:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:13,742 INFO L225 Difference]: With dead ends: 295 [2021-01-06 11:33:13,742 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 11:33:13,743 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 [2021-01-06 11:33:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 11:33:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-01-06 11:33:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 11:33:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2021-01-06 11:33:13,748 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 35 [2021-01-06 11:33:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:13,748 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2021-01-06 11:33:13,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:33:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2021-01-06 11:33:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:33:13,749 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:13,750 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, 1, 1, 1] [2021-01-06 11:33:13,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:13,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1740740991, now seen corresponding path program 1 times [2021-01-06 11:33:13,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:13,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688712000] [2021-01-06 11:33:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:14,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688712000] [2021-01-06 11:33:14,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:14,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:33:14,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409047330] [2021-01-06 11:33:14,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:33:14,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:14,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:33:14,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:33:14,045 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 4 states. [2021-01-06 11:33:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:14,246 INFO L93 Difference]: Finished difference Result 365 states and 542 transitions. [2021-01-06 11:33:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:33:14,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2021-01-06 11:33:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:14,248 INFO L225 Difference]: With dead ends: 365 [2021-01-06 11:33:14,248 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 11:33:14,250 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 [2021-01-06 11:33:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 11:33:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 130. [2021-01-06 11:33:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 11:33:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 195 transitions. [2021-01-06 11:33:14,258 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 195 transitions. Word has length 36 [2021-01-06 11:33:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:14,258 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 195 transitions. [2021-01-06 11:33:14,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:33:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 195 transitions. [2021-01-06 11:33:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:33:14,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:14,260 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] [2021-01-06 11:33:14,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 11:33:14,260 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1564383683, now seen corresponding path program 2 times [2021-01-06 11:33:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:14,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272058243] [2021-01-06 11:33:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272058243] [2021-01-06 11:33:14,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587004258] [2021-01-06 11:33:14,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:14,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 11:33:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:33:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 11:33:14,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:33:14,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-01-06 11:33:14,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919697335] [2021-01-06 11:33:14,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:33:14,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:33:14,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:33:14,482 INFO L87 Difference]: Start difference. First operand 130 states and 195 transitions. Second operand 6 states. [2021-01-06 11:33:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:14,820 INFO L93 Difference]: Finished difference Result 362 states and 520 transitions. [2021-01-06 11:33:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:33:14,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2021-01-06 11:33:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:14,823 INFO L225 Difference]: With dead ends: 362 [2021-01-06 11:33:14,823 INFO L226 Difference]: Without dead ends: 358 [2021-01-06 11:33:14,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:33:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-01-06 11:33:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 199. [2021-01-06 11:33:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 11:33:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 299 transitions. [2021-01-06 11:33:14,840 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 299 transitions. Word has length 38 [2021-01-06 11:33:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:14,841 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 299 transitions. [2021-01-06 11:33:14,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:33:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 299 transitions. [2021-01-06 11:33:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 11:33:14,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:14,846 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] [2021-01-06 11:33:15,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:15,061 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:15,062 INFO L82 PathProgramCache]: Analyzing trace with hash 185749245, now seen corresponding path program 1 times [2021-01-06 11:33:15,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:15,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455897449] [2021-01-06 11:33:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455897449] [2021-01-06 11:33:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380778887] [2021-01-06 11:33:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:33:15,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:15,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:15,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:33:15,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538425971] [2021-01-06 11:33:15,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:33:15,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:33:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:33:15,309 INFO L87 Difference]: Start difference. First operand 199 states and 299 transitions. Second operand 7 states. [2021-01-06 11:33:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:15,451 INFO L93 Difference]: Finished difference Result 481 states and 720 transitions. [2021-01-06 11:33:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:33:15,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2021-01-06 11:33:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:15,455 INFO L225 Difference]: With dead ends: 481 [2021-01-06 11:33:15,455 INFO L226 Difference]: Without dead ends: 316 [2021-01-06 11:33:15,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:33:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-01-06 11:33:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 202. [2021-01-06 11:33:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 11:33:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 303 transitions. [2021-01-06 11:33:15,464 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 303 transitions. Word has length 40 [2021-01-06 11:33:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:15,465 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 303 transitions. [2021-01-06 11:33:15,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:33:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 303 transitions. [2021-01-06 11:33:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:33:15,465 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:15,466 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, 1] [2021-01-06 11:33:15,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:33:15,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1883151946, now seen corresponding path program 1 times [2021-01-06 11:33:15,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:15,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148151991] [2021-01-06 11:33:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148151991] [2021-01-06 11:33:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592785518] [2021-01-06 11:33:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:33:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 11:33:15,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:33:15,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-01-06 11:33:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492744485] [2021-01-06 11:33:15,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:33:15,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:33:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:15,942 INFO L87 Difference]: Start difference. First operand 202 states and 303 transitions. Second operand 6 states. [2021-01-06 11:33:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:16,268 INFO L93 Difference]: Finished difference Result 366 states and 523 transitions. [2021-01-06 11:33:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:33:16,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2021-01-06 11:33:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:16,277 INFO L225 Difference]: With dead ends: 366 [2021-01-06 11:33:16,277 INFO L226 Difference]: Without dead ends: 361 [2021-01-06 11:33:16,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:33:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-01-06 11:33:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 217. [2021-01-06 11:33:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 11:33:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 319 transitions. [2021-01-06 11:33:16,290 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 319 transitions. Word has length 41 [2021-01-06 11:33:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:16,290 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 319 transitions. [2021-01-06 11:33:16,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:33:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 319 transitions. [2021-01-06 11:33:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:33:16,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:16,291 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, 1] [2021-01-06 11:33:16,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:16,506 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1884998988, now seen corresponding path program 1 times [2021-01-06 11:33:16,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:16,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322628264] [2021-01-06 11:33:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 11:33:16,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322628264] [2021-01-06 11:33:16,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:33:16,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 11:33:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068302847] [2021-01-06 11:33:16,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:33:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:33:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:33:16,597 INFO L87 Difference]: Start difference. First operand 217 states and 319 transitions. Second operand 5 states. [2021-01-06 11:33:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:16,628 INFO L93 Difference]: Finished difference Result 222 states and 323 transitions. [2021-01-06 11:33:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:33:16,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2021-01-06 11:33:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:16,631 INFO L225 Difference]: With dead ends: 222 [2021-01-06 11:33:16,631 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 11:33:16,632 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 [2021-01-06 11:33:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 11:33:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-01-06 11:33:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 11:33:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 301 transitions. [2021-01-06 11:33:16,640 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 301 transitions. Word has length 41 [2021-01-06 11:33:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:16,640 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 301 transitions. [2021-01-06 11:33:16,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:33:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 301 transitions. [2021-01-06 11:33:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 11:33:16,643 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:16,643 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, 1, 1, 1] [2021-01-06 11:33:16,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 11:33:16,643 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1609584255, now seen corresponding path program 1 times [2021-01-06 11:33:16,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:16,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553327031] [2021-01-06 11:33:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:16,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553327031] [2021-01-06 11:33:16,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059704744] [2021-01-06 11:33:16,775 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 [2021-01-06 11:33:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:33:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:16,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:16,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:33:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078139697] [2021-01-06 11:33:16,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:33:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:33:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:33:16,946 INFO L87 Difference]: Start difference. First operand 205 states and 301 transitions. Second operand 6 states. [2021-01-06 11:33:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:17,284 INFO L93 Difference]: Finished difference Result 622 states and 899 transitions. [2021-01-06 11:33:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:33:17,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2021-01-06 11:33:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:17,287 INFO L225 Difference]: With dead ends: 622 [2021-01-06 11:33:17,287 INFO L226 Difference]: Without dead ends: 446 [2021-01-06 11:33:17,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:33:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-01-06 11:33:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 205. [2021-01-06 11:33:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 11:33:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 300 transitions. [2021-01-06 11:33:17,298 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 300 transitions. Word has length 43 [2021-01-06 11:33:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:17,298 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 300 transitions. [2021-01-06 11:33:17,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:33:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 300 transitions. [2021-01-06 11:33:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 11:33:17,299 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:17,299 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] [2021-01-06 11:33:17,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:17,514 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1735244033, now seen corresponding path program 1 times [2021-01-06 11:33:17,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:17,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016056790] [2021-01-06 11:33:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:17,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016056790] [2021-01-06 11:33:17,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121822736] [2021-01-06 11:33:17,586 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:33:17,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:17,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:17,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:33:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657921788] [2021-01-06 11:33:17,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:33:17,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:33:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:33:17,727 INFO L87 Difference]: Start difference. First operand 205 states and 300 transitions. Second operand 8 states. [2021-01-06 11:33:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:17,889 INFO L93 Difference]: Finished difference Result 497 states and 723 transitions. [2021-01-06 11:33:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:33:17,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-01-06 11:33:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:17,892 INFO L225 Difference]: With dead ends: 497 [2021-01-06 11:33:17,892 INFO L226 Difference]: Without dead ends: 329 [2021-01-06 11:33:17,893 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 [2021-01-06 11:33:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-01-06 11:33:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 208. [2021-01-06 11:33:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-01-06 11:33:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 304 transitions. [2021-01-06 11:33:17,904 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 304 transitions. Word has length 45 [2021-01-06 11:33:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:17,905 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 304 transitions. [2021-01-06 11:33:17,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:33:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 304 transitions. [2021-01-06 11:33:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:33:17,906 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:17,906 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, 1, 1, 1] [2021-01-06 11:33:18,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:33:18,121 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash -411007536, now seen corresponding path program 2 times [2021-01-06 11:33:18,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:18,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170492613] [2021-01-06 11:33:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170492613] [2021-01-06 11:33:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660659411] [2021-01-06 11:33:18,201 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 [2021-01-06 11:33:18,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:33:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:18,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:18,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:33:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697784673] [2021-01-06 11:33:18,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:33:18,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:33:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:33:18,505 INFO L87 Difference]: Start difference. First operand 208 states and 304 transitions. Second operand 7 states. [2021-01-06 11:33:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:18,949 INFO L93 Difference]: Finished difference Result 625 states and 902 transitions. [2021-01-06 11:33:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:33:18,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2021-01-06 11:33:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:18,952 INFO L225 Difference]: With dead ends: 625 [2021-01-06 11:33:18,953 INFO L226 Difference]: Without dead ends: 449 [2021-01-06 11:33:18,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:33:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-01-06 11:33:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 208. [2021-01-06 11:33:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-01-06 11:33:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 303 transitions. [2021-01-06 11:33:18,963 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 303 transitions. Word has length 46 [2021-01-06 11:33:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:18,964 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 303 transitions. [2021-01-06 11:33:18,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:33:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 303 transitions. [2021-01-06 11:33:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 11:33:18,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:18,965 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] [2021-01-06 11:33:19,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:33:19,180 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1271750674, now seen corresponding path program 2 times [2021-01-06 11:33:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:19,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297051542] [2021-01-06 11:33:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:19,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297051542] [2021-01-06 11:33:19,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039283087] [2021-01-06 11:33:19,285 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:19,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:19,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:19,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:33:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:19,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:19,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:33:19,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521862488] [2021-01-06 11:33:19,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:33:19,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:33:19,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:19,467 INFO L87 Difference]: Start difference. First operand 208 states and 303 transitions. Second operand 9 states. [2021-01-06 11:33:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:19,655 INFO L93 Difference]: Finished difference Result 500 states and 726 transitions. [2021-01-06 11:33:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:33:19,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2021-01-06 11:33:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:19,658 INFO L225 Difference]: With dead ends: 500 [2021-01-06 11:33:19,658 INFO L226 Difference]: Without dead ends: 332 [2021-01-06 11:33:19,659 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 [2021-01-06 11:33:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-01-06 11:33:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 211. [2021-01-06 11:33:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2021-01-06 11:33:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 307 transitions. [2021-01-06 11:33:19,675 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 307 transitions. Word has length 48 [2021-01-06 11:33:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:19,677 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 307 transitions. [2021-01-06 11:33:19,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:33:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 307 transitions. [2021-01-06 11:33:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:33:19,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:19,678 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, 1, 1, 1] [2021-01-06 11:33:19,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:33:19,888 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1894399777, now seen corresponding path program 3 times [2021-01-06 11:33:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:19,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270114235] [2021-01-06 11:33:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:20,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270114235] [2021-01-06 11:33:20,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376798479] [2021-01-06 11:33:20,019 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 [2021-01-06 11:33:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:33:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:33:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:20,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:20,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:33:20,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226038978] [2021-01-06 11:33:20,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:33:20,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:33:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:33:20,515 INFO L87 Difference]: Start difference. First operand 211 states and 307 transitions. Second operand 8 states. [2021-01-06 11:33:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:20,828 INFO L93 Difference]: Finished difference Result 628 states and 905 transitions. [2021-01-06 11:33:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:33:20,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2021-01-06 11:33:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:20,831 INFO L225 Difference]: With dead ends: 628 [2021-01-06 11:33:20,832 INFO L226 Difference]: Without dead ends: 452 [2021-01-06 11:33:20,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:33:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-01-06 11:33:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 211. [2021-01-06 11:33:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2021-01-06 11:33:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 306 transitions. [2021-01-06 11:33:20,844 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 306 transitions. Word has length 49 [2021-01-06 11:33:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:20,844 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 306 transitions. [2021-01-06 11:33:20,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:33:20,844 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 306 transitions. [2021-01-06 11:33:20,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:33:20,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:20,845 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] [2021-01-06 11:33:21,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:33:21,049 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1660949345, now seen corresponding path program 3 times [2021-01-06 11:33:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:21,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860324676] [2021-01-06 11:33:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:21,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860324676] [2021-01-06 11:33:21,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919272986] [2021-01-06 11:33:21,134 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:21,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 11:33:21,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:33:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:21,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:21,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:33:21,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897456858] [2021-01-06 11:33:21,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:33:21,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:21,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:33:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:33:21,338 INFO L87 Difference]: Start difference. First operand 211 states and 306 transitions. Second operand 10 states. [2021-01-06 11:33:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:21,515 INFO L93 Difference]: Finished difference Result 503 states and 729 transitions. [2021-01-06 11:33:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:33:21,516 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 11:33:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:21,518 INFO L225 Difference]: With dead ends: 503 [2021-01-06 11:33:21,518 INFO L226 Difference]: Without dead ends: 335 [2021-01-06 11:33:21,519 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 [2021-01-06 11:33:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-01-06 11:33:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 214. [2021-01-06 11:33:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2021-01-06 11:33:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 310 transitions. [2021-01-06 11:33:21,529 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 310 transitions. Word has length 51 [2021-01-06 11:33:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:21,529 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 310 transitions. [2021-01-06 11:33:21,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:33:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 310 transitions. [2021-01-06 11:33:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 11:33:21,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:21,530 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, 1, 1, 1] [2021-01-06 11:33:21,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:33:21,745 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1580824432, now seen corresponding path program 4 times [2021-01-06 11:33:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:21,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495219962] [2021-01-06 11:33:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495219962] [2021-01-06 11:33:21,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10861509] [2021-01-06 11:33:21,854 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 [2021-01-06 11:33:21,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:33:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:22,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:22,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:33:22,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376844247] [2021-01-06 11:33:22,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:33:22,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:33:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:22,084 INFO L87 Difference]: Start difference. First operand 214 states and 310 transitions. Second operand 9 states. [2021-01-06 11:33:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:22,597 INFO L93 Difference]: Finished difference Result 631 states and 908 transitions. [2021-01-06 11:33:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:33:22,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2021-01-06 11:33:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:22,600 INFO L225 Difference]: With dead ends: 631 [2021-01-06 11:33:22,600 INFO L226 Difference]: Without dead ends: 455 [2021-01-06 11:33:22,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:33:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-01-06 11:33:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 214. [2021-01-06 11:33:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2021-01-06 11:33:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 309 transitions. [2021-01-06 11:33:22,611 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 309 transitions. Word has length 52 [2021-01-06 11:33:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:22,611 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 309 transitions. [2021-01-06 11:33:22,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:33:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 309 transitions. [2021-01-06 11:33:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 11:33:22,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:22,612 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] [2021-01-06 11:33:22,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:22,825 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -133142094, now seen corresponding path program 4 times [2021-01-06 11:33:22,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:22,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8501654] [2021-01-06 11:33:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:22,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8501654] [2021-01-06 11:33:22,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796689498] [2021-01-06 11:33:22,926 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 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 [2021-01-06 11:33:23,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:23,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:23,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:33:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:23,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:23,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:33:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998445817] [2021-01-06 11:33:23,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:33:23,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:33:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:33:23,062 INFO L87 Difference]: Start difference. First operand 214 states and 309 transitions. Second operand 11 states. [2021-01-06 11:33:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:23,189 INFO L93 Difference]: Finished difference Result 506 states and 732 transitions. [2021-01-06 11:33:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:33:23,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2021-01-06 11:33:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:23,191 INFO L225 Difference]: With dead ends: 506 [2021-01-06 11:33:23,191 INFO L226 Difference]: Without dead ends: 338 [2021-01-06 11:33:23,192 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 [2021-01-06 11:33:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-01-06 11:33:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 217. [2021-01-06 11:33:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 11:33:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 313 transitions. [2021-01-06 11:33:23,201 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 313 transitions. Word has length 54 [2021-01-06 11:33:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:23,201 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 313 transitions. [2021-01-06 11:33:23,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:33:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 313 transitions. [2021-01-06 11:33:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 11:33:23,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:23,202 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, 1, 1, 1] [2021-01-06 11:33:23,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:23,417 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1798564671, now seen corresponding path program 5 times [2021-01-06 11:33:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621543215] [2021-01-06 11:33:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621543215] [2021-01-06 11:33:23,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535295589] [2021-01-06 11:33:23,535 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 [2021-01-06 11:33:23,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:33:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:33:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:23,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:33:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205711340] [2021-01-06 11:33:23,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:33:23,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:33:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:33:23,750 INFO L87 Difference]: Start difference. First operand 217 states and 313 transitions. Second operand 10 states. [2021-01-06 11:33:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:24,358 INFO L93 Difference]: Finished difference Result 634 states and 911 transitions. [2021-01-06 11:33:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:33:24,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2021-01-06 11:33:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:24,362 INFO L225 Difference]: With dead ends: 634 [2021-01-06 11:33:24,362 INFO L226 Difference]: Without dead ends: 458 [2021-01-06 11:33:24,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:33:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-01-06 11:33:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 217. [2021-01-06 11:33:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 11:33:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 312 transitions. [2021-01-06 11:33:24,372 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 312 transitions. Word has length 55 [2021-01-06 11:33:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:24,373 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 312 transitions. [2021-01-06 11:33:24,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:33:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 312 transitions. [2021-01-06 11:33:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 11:33:24,373 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:24,374 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] [2021-01-06 11:33:24,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:33:24,589 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:24,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1338169919, now seen corresponding path program 5 times [2021-01-06 11:33:24,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:24,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985648606] [2021-01-06 11:33:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:24,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985648606] [2021-01-06 11:33:24,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458713734] [2021-01-06 11:33:24,685 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 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 [2021-01-06 11:33:24,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 11:33:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:24,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:33:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:24,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:24,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:33:24,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717280063] [2021-01-06 11:33:24,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:33:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:24,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:33:24,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:33:24,838 INFO L87 Difference]: Start difference. First operand 217 states and 312 transitions. Second operand 12 states. [2021-01-06 11:33:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:24,972 INFO L93 Difference]: Finished difference Result 509 states and 735 transitions. [2021-01-06 11:33:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:33:24,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2021-01-06 11:33:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:24,975 INFO L225 Difference]: With dead ends: 509 [2021-01-06 11:33:24,975 INFO L226 Difference]: Without dead ends: 341 [2021-01-06 11:33:24,976 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 [2021-01-06 11:33:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-01-06 11:33:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 220. [2021-01-06 11:33:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2021-01-06 11:33:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 316 transitions. [2021-01-06 11:33:24,985 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 316 transitions. Word has length 57 [2021-01-06 11:33:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:24,986 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 316 transitions. [2021-01-06 11:33:24,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:33:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 316 transitions. [2021-01-06 11:33:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 11:33:24,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:24,987 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, 1, 1, 1] [2021-01-06 11:33:25,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:25,202 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1197559536, now seen corresponding path program 6 times [2021-01-06 11:33:25,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:25,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382688673] [2021-01-06 11:33:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:25,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382688673] [2021-01-06 11:33:25,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142087524] [2021-01-06 11:33:25,342 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 [2021-01-06 11:33:25,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:33:25,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:33:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:25,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:25,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:33:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383915525] [2021-01-06 11:33:25,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:33:25,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:33:25,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:33:25,868 INFO L87 Difference]: Start difference. First operand 220 states and 316 transitions. Second operand 11 states. [2021-01-06 11:33:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:26,483 INFO L93 Difference]: Finished difference Result 637 states and 914 transitions. [2021-01-06 11:33:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:33:26,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2021-01-06 11:33:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:26,486 INFO L225 Difference]: With dead ends: 637 [2021-01-06 11:33:26,486 INFO L226 Difference]: Without dead ends: 461 [2021-01-06 11:33:26,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:33:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-01-06 11:33:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 220. [2021-01-06 11:33:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2021-01-06 11:33:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 315 transitions. [2021-01-06 11:33:26,497 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 315 transitions. Word has length 58 [2021-01-06 11:33:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:26,497 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 315 transitions. [2021-01-06 11:33:26,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:33:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 315 transitions. [2021-01-06 11:33:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 11:33:26,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:26,498 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] [2021-01-06 11:33:26,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:33:26,714 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1309522770, now seen corresponding path program 6 times [2021-01-06 11:33:26,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:26,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349830055] [2021-01-06 11:33:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:26,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349830055] [2021-01-06 11:33:26,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105801648] [2021-01-06 11:33:26,832 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 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 [2021-01-06 11:33:26,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 11:33:26,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:33:26,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:27,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:33:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132305080] [2021-01-06 11:33:27,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:33:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:33:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:33:27,019 INFO L87 Difference]: Start difference. First operand 220 states and 315 transitions. Second operand 13 states. [2021-01-06 11:33:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:27,254 INFO L93 Difference]: Finished difference Result 512 states and 738 transitions. [2021-01-06 11:33:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:33:27,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2021-01-06 11:33:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:27,257 INFO L225 Difference]: With dead ends: 512 [2021-01-06 11:33:27,257 INFO L226 Difference]: Without dead ends: 344 [2021-01-06 11:33:27,258 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 [2021-01-06 11:33:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-01-06 11:33:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 223. [2021-01-06 11:33:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 11:33:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 319 transitions. [2021-01-06 11:33:27,269 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 319 transitions. Word has length 60 [2021-01-06 11:33:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:27,269 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 319 transitions. [2021-01-06 11:33:27,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:33:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 319 transitions. [2021-01-06 11:33:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 11:33:27,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:27,271 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, 1, 1, 1] [2021-01-06 11:33:27,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:33:27,483 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash -723464801, now seen corresponding path program 7 times [2021-01-06 11:33:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:27,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011510146] [2021-01-06 11:33:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:27,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011510146] [2021-01-06 11:33:27,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653508449] [2021-01-06 11:33:27,643 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 [2021-01-06 11:33:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:33:27,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:27,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:27,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:33:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708926424] [2021-01-06 11:33:27,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:33:27,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:33:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:33:27,898 INFO L87 Difference]: Start difference. First operand 223 states and 319 transitions. Second operand 12 states. [2021-01-06 11:33:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:28,473 INFO L93 Difference]: Finished difference Result 640 states and 917 transitions. [2021-01-06 11:33:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:33:28,474 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2021-01-06 11:33:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:28,476 INFO L225 Difference]: With dead ends: 640 [2021-01-06 11:33:28,476 INFO L226 Difference]: Without dead ends: 464 [2021-01-06 11:33:28,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:33:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-01-06 11:33:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 223. [2021-01-06 11:33:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 11:33:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 318 transitions. [2021-01-06 11:33:28,488 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 318 transitions. Word has length 61 [2021-01-06 11:33:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:28,488 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 318 transitions. [2021-01-06 11:33:28,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:33:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 318 transitions. [2021-01-06 11:33:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 11:33:28,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:28,489 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] [2021-01-06 11:33:28,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 11:33:28,703 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:28,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1648029729, now seen corresponding path program 7 times [2021-01-06 11:33:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:28,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244777536] [2021-01-06 11:33:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244777536] [2021-01-06 11:33:28,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429210577] [2021-01-06 11:33:28,827 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 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 [2021-01-06 11:33:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:33:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:29,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:29,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:33:29,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469966707] [2021-01-06 11:33:29,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:33:29,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:33:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:33:29,010 INFO L87 Difference]: Start difference. First operand 223 states and 318 transitions. Second operand 14 states. [2021-01-06 11:33:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:29,151 INFO L93 Difference]: Finished difference Result 515 states and 741 transitions. [2021-01-06 11:33:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:33:29,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2021-01-06 11:33:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:29,154 INFO L225 Difference]: With dead ends: 515 [2021-01-06 11:33:29,154 INFO L226 Difference]: Without dead ends: 347 [2021-01-06 11:33:29,155 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 [2021-01-06 11:33:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-01-06 11:33:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 226. [2021-01-06 11:33:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2021-01-06 11:33:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 322 transitions. [2021-01-06 11:33:29,167 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 322 transitions. Word has length 63 [2021-01-06 11:33:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:29,167 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 322 transitions. [2021-01-06 11:33:29,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:33:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 322 transitions. [2021-01-06 11:33:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 11:33:29,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:29,169 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, 1, 1, 1] [2021-01-06 11:33:29,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 11:33:29,383 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1180316336, now seen corresponding path program 8 times [2021-01-06 11:33:29,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:29,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858726237] [2021-01-06 11:33:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858726237] [2021-01-06 11:33:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344762414] [2021-01-06 11:33:29,562 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 [2021-01-06 11:33:29,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:29,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:29,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:33:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:29,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:29,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:33:29,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450001394] [2021-01-06 11:33:29,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:33:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:33:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:33:29,905 INFO L87 Difference]: Start difference. First operand 226 states and 322 transitions. Second operand 13 states. [2021-01-06 11:33:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:30,739 INFO L93 Difference]: Finished difference Result 643 states and 920 transitions. [2021-01-06 11:33:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:33:30,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2021-01-06 11:33:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:30,742 INFO L225 Difference]: With dead ends: 643 [2021-01-06 11:33:30,742 INFO L226 Difference]: Without dead ends: 467 [2021-01-06 11:33:30,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:33:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-01-06 11:33:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 226. [2021-01-06 11:33:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2021-01-06 11:33:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2021-01-06 11:33:30,753 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 64 [2021-01-06 11:33:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:30,753 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2021-01-06 11:33:30,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:33:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2021-01-06 11:33:30,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 11:33:30,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:30,754 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] [2021-01-06 11:33:30,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 11:33:30,968 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1525634290, now seen corresponding path program 8 times [2021-01-06 11:33:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:30,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910366733] [2021-01-06 11:33:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:31,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910366733] [2021-01-06 11:33:31,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635152235] [2021-01-06 11:33:31,109 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 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 [2021-01-06 11:33:31,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:33:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:31,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:33:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707812675] [2021-01-06 11:33:31,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:33:31,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:33:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:33:31,277 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand 15 states. [2021-01-06 11:33:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:31,573 INFO L93 Difference]: Finished difference Result 518 states and 744 transitions. [2021-01-06 11:33:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:33:31,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 11:33:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:31,576 INFO L225 Difference]: With dead ends: 518 [2021-01-06 11:33:31,576 INFO L226 Difference]: Without dead ends: 350 [2021-01-06 11:33:31,576 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 [2021-01-06 11:33:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-01-06 11:33:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 229. [2021-01-06 11:33:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 11:33:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 325 transitions. [2021-01-06 11:33:31,587 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 325 transitions. Word has length 66 [2021-01-06 11:33:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:31,588 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 325 transitions. [2021-01-06 11:33:31,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:33:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 325 transitions. [2021-01-06 11:33:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 11:33:31,589 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:31,589 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, 1, 1, 1] [2021-01-06 11:33:31,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:31,805 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1681025023, now seen corresponding path program 9 times [2021-01-06 11:33:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:31,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49083958] [2021-01-06 11:33:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:31,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49083958] [2021-01-06 11:33:31,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20730286] [2021-01-06 11:33:31,995 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 [2021-01-06 11:33:32,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 11:33:32,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 11:33:32,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:32,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:32,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:33:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712490064] [2021-01-06 11:33:32,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:33:32,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:33:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:33:32,980 INFO L87 Difference]: Start difference. First operand 229 states and 325 transitions. Second operand 14 states. [2021-01-06 11:33:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:33,940 INFO L93 Difference]: Finished difference Result 646 states and 923 transitions. [2021-01-06 11:33:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:33:33,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2021-01-06 11:33:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:33,943 INFO L225 Difference]: With dead ends: 646 [2021-01-06 11:33:33,943 INFO L226 Difference]: Without dead ends: 470 [2021-01-06 11:33:33,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:33:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-01-06 11:33:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 229. [2021-01-06 11:33:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 11:33:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 324 transitions. [2021-01-06 11:33:33,955 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 324 transitions. Word has length 67 [2021-01-06 11:33:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:33,956 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 324 transitions. [2021-01-06 11:33:33,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:33:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 324 transitions. [2021-01-06 11:33:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 11:33:33,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:33,957 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] [2021-01-06 11:33:34,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:33:34,161 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1670345345, now seen corresponding path program 9 times [2021-01-06 11:33:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:34,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976416175] [2021-01-06 11:33:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976416175] [2021-01-06 11:33:34,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373224149] [2021-01-06 11:33:34,313 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 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 [2021-01-06 11:33:34,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 11:33:34,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:33:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:34,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:34,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 11:33:34,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125992212] [2021-01-06 11:33:34,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:33:34,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:33:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:33:34,744 INFO L87 Difference]: Start difference. First operand 229 states and 324 transitions. Second operand 16 states. [2021-01-06 11:33:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:35,085 INFO L93 Difference]: Finished difference Result 521 states and 747 transitions. [2021-01-06 11:33:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:33:35,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2021-01-06 11:33:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:35,088 INFO L225 Difference]: With dead ends: 521 [2021-01-06 11:33:35,088 INFO L226 Difference]: Without dead ends: 353 [2021-01-06 11:33:35,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:33:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-01-06 11:33:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 232. [2021-01-06 11:33:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 11:33:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 328 transitions. [2021-01-06 11:33:35,099 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 328 transitions. Word has length 69 [2021-01-06 11:33:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:35,099 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 328 transitions. [2021-01-06 11:33:35,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:33:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 328 transitions. [2021-01-06 11:33:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 11:33:35,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:35,101 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, 1, 1, 1] [2021-01-06 11:33:35,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:35,304 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1872100432, now seen corresponding path program 10 times [2021-01-06 11:33:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:35,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687012655] [2021-01-06 11:33:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687012655] [2021-01-06 11:33:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569563056] [2021-01-06 11:33:35,500 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 [2021-01-06 11:33:35,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:35,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 11:33:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:35,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:35,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:33:35,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286423915] [2021-01-06 11:33:35,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:33:35,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:33:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:33:35,858 INFO L87 Difference]: Start difference. First operand 232 states and 328 transitions. Second operand 15 states. [2021-01-06 11:33:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:36,901 INFO L93 Difference]: Finished difference Result 649 states and 926 transitions. [2021-01-06 11:33:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:33:36,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2021-01-06 11:33:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:36,904 INFO L225 Difference]: With dead ends: 649 [2021-01-06 11:33:36,904 INFO L226 Difference]: Without dead ends: 473 [2021-01-06 11:33:36,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:33:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-01-06 11:33:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 232. [2021-01-06 11:33:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 11:33:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 327 transitions. [2021-01-06 11:33:36,923 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 327 transitions. Word has length 70 [2021-01-06 11:33:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:36,924 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 327 transitions. [2021-01-06 11:33:36,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:33:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 327 transitions. [2021-01-06 11:33:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 11:33:36,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:36,925 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] [2021-01-06 11:33:37,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 11:33:37,137 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 610219666, now seen corresponding path program 10 times [2021-01-06 11:33:37,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:37,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712966341] [2021-01-06 11:33:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:37,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712966341] [2021-01-06 11:33:37,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155807895] [2021-01-06 11:33:37,317 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 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 [2021-01-06 11:33:37,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:37,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:33:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:37,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:37,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:33:37,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642182412] [2021-01-06 11:33:37,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:33:37,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:33:37,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:33:37,486 INFO L87 Difference]: Start difference. First operand 232 states and 327 transitions. Second operand 17 states. [2021-01-06 11:33:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:37,843 INFO L93 Difference]: Finished difference Result 524 states and 750 transitions. [2021-01-06 11:33:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:33:37,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2021-01-06 11:33:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:37,846 INFO L225 Difference]: With dead ends: 524 [2021-01-06 11:33:37,847 INFO L226 Difference]: Without dead ends: 356 [2021-01-06 11:33:37,848 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 [2021-01-06 11:33:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-01-06 11:33:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 235. [2021-01-06 11:33:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 11:33:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 331 transitions. [2021-01-06 11:33:37,861 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 331 transitions. Word has length 72 [2021-01-06 11:33:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:37,862 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 331 transitions. [2021-01-06 11:33:37,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:33:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 331 transitions. [2021-01-06 11:33:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 11:33:37,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:37,863 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, 1, 1, 1] [2021-01-06 11:33:38,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:38,077 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash -927024545, now seen corresponding path program 11 times [2021-01-06 11:33:38,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:38,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419689263] [2021-01-06 11:33:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:38,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419689263] [2021-01-06 11:33:38,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100129568] [2021-01-06 11:33:38,305 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 [2021-01-06 11:33:38,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:33:38,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 11:33:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:38,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:38,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 11:33:38,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628614873] [2021-01-06 11:33:38,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:33:38,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:33:38,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:33:38,701 INFO L87 Difference]: Start difference. First operand 235 states and 331 transitions. Second operand 16 states. [2021-01-06 11:33:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:39,837 INFO L93 Difference]: Finished difference Result 652 states and 929 transitions. [2021-01-06 11:33:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:33:39,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2021-01-06 11:33:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:39,840 INFO L225 Difference]: With dead ends: 652 [2021-01-06 11:33:39,840 INFO L226 Difference]: Without dead ends: 476 [2021-01-06 11:33:39,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:33:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-01-06 11:33:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 235. [2021-01-06 11:33:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 11:33:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 330 transitions. [2021-01-06 11:33:39,857 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 330 transitions. Word has length 73 [2021-01-06 11:33:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:39,857 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 330 transitions. [2021-01-06 11:33:39,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:33:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 330 transitions. [2021-01-06 11:33:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 11:33:39,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:39,858 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] [2021-01-06 11:33:40,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 11:33:40,072 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash -699355935, now seen corresponding path program 11 times [2021-01-06 11:33:40,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:40,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515094159] [2021-01-06 11:33:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515094159] [2021-01-06 11:33:40,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630244763] [2021-01-06 11:33:40,256 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 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 [2021-01-06 11:33:40,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 11:33:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:33:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:40,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:40,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 11:33:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210370382] [2021-01-06 11:33:40,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:33:40,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:33:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:33:40,457 INFO L87 Difference]: Start difference. First operand 235 states and 330 transitions. Second operand 18 states. [2021-01-06 11:33:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:40,778 INFO L93 Difference]: Finished difference Result 527 states and 753 transitions. [2021-01-06 11:33:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:33:40,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2021-01-06 11:33:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:40,781 INFO L225 Difference]: With dead ends: 527 [2021-01-06 11:33:40,782 INFO L226 Difference]: Without dead ends: 359 [2021-01-06 11:33:40,782 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 [2021-01-06 11:33:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-01-06 11:33:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 238. [2021-01-06 11:33:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-01-06 11:33:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 334 transitions. [2021-01-06 11:33:40,795 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 334 transitions. Word has length 75 [2021-01-06 11:33:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:40,796 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 334 transitions. [2021-01-06 11:33:40,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:33:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 334 transitions. [2021-01-06 11:33:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 11:33:40,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:40,797 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, 1, 1, 1] [2021-01-06 11:33:41,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:41,012 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:41,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1425804784, now seen corresponding path program 12 times [2021-01-06 11:33:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:41,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745930856] [2021-01-06 11:33:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745930856] [2021-01-06 11:33:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595695113] [2021-01-06 11:33:41,272 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 [2021-01-06 11:33:42,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:33:42,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 11:33:42,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:42,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:42,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:33:42,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099286506] [2021-01-06 11:33:42,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:33:42,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:33:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:33:42,327 INFO L87 Difference]: Start difference. First operand 238 states and 334 transitions. Second operand 17 states. [2021-01-06 11:33:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:43,226 INFO L93 Difference]: Finished difference Result 655 states and 932 transitions. [2021-01-06 11:33:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:33:43,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 11:33:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:43,229 INFO L225 Difference]: With dead ends: 655 [2021-01-06 11:33:43,229 INFO L226 Difference]: Without dead ends: 479 [2021-01-06 11:33:43,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:33:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-01-06 11:33:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 238. [2021-01-06 11:33:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2021-01-06 11:33:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 333 transitions. [2021-01-06 11:33:43,243 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 333 transitions. Word has length 76 [2021-01-06 11:33:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:43,243 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 333 transitions. [2021-01-06 11:33:43,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:33:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 333 transitions. [2021-01-06 11:33:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 11:33:43,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:43,245 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] [2021-01-06 11:33:43,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 11:33:43,449 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1216831538, now seen corresponding path program 12 times [2021-01-06 11:33:43,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:43,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752145553] [2021-01-06 11:33:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:43,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752145553] [2021-01-06 11:33:43,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70223687] [2021-01-06 11:33:43,658 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 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 [2021-01-06 11:33:43,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 11:33:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:33:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:43,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:43,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:33:43,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172366091] [2021-01-06 11:33:43,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:33:43,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:33:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:33:43,865 INFO L87 Difference]: Start difference. First operand 238 states and 333 transitions. Second operand 19 states. [2021-01-06 11:33:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:44,144 INFO L93 Difference]: Finished difference Result 530 states and 756 transitions. [2021-01-06 11:33:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:33:44,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2021-01-06 11:33:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:44,147 INFO L225 Difference]: With dead ends: 530 [2021-01-06 11:33:44,147 INFO L226 Difference]: Without dead ends: 362 [2021-01-06 11:33:44,148 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 [2021-01-06 11:33:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-01-06 11:33:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 241. [2021-01-06 11:33:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2021-01-06 11:33:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 337 transitions. [2021-01-06 11:33:44,161 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 337 transitions. Word has length 78 [2021-01-06 11:33:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:44,161 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 337 transitions. [2021-01-06 11:33:44,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:33:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 337 transitions. [2021-01-06 11:33:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 11:33:44,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:44,163 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, 1, 1, 1] [2021-01-06 11:33:44,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:44,376 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:44,377 INFO L82 PathProgramCache]: Analyzing trace with hash 698074303, now seen corresponding path program 13 times [2021-01-06 11:33:44,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:44,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481616878] [2021-01-06 11:33:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481616878] [2021-01-06 11:33:44,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427607725] [2021-01-06 11:33:44,671 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 [2021-01-06 11:33:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 11:33:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:45,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:45,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 11:33:45,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954594382] [2021-01-06 11:33:45,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:33:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:33:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:33:45,116 INFO L87 Difference]: Start difference. First operand 241 states and 337 transitions. Second operand 18 states. [2021-01-06 11:33:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:46,378 INFO L93 Difference]: Finished difference Result 658 states and 935 transitions. [2021-01-06 11:33:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:33:46,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2021-01-06 11:33:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:46,381 INFO L225 Difference]: With dead ends: 658 [2021-01-06 11:33:46,381 INFO L226 Difference]: Without dead ends: 482 [2021-01-06 11:33:46,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:33:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-01-06 11:33:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 241. [2021-01-06 11:33:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2021-01-06 11:33:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2021-01-06 11:33:46,396 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 79 [2021-01-06 11:33:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:46,396 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2021-01-06 11:33:46,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:33:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2021-01-06 11:33:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 11:33:46,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:46,397 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] [2021-01-06 11:33:46,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 11:33:46,606 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1947508545, now seen corresponding path program 13 times [2021-01-06 11:33:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:46,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933828851] [2021-01-06 11:33:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933828851] [2021-01-06 11:33:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576927552] [2021-01-06 11:33:46,833 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 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 [2021-01-06 11:33:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:46,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:33:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:47,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:47,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 11:33:47,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372306754] [2021-01-06 11:33:47,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:33:47,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:33:47,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:33:47,021 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand 20 states. [2021-01-06 11:33:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:47,352 INFO L93 Difference]: Finished difference Result 533 states and 759 transitions. [2021-01-06 11:33:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:33:47,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2021-01-06 11:33:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:47,354 INFO L225 Difference]: With dead ends: 533 [2021-01-06 11:33:47,354 INFO L226 Difference]: Without dead ends: 365 [2021-01-06 11:33:47,355 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 [2021-01-06 11:33:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-01-06 11:33:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 244. [2021-01-06 11:33:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2021-01-06 11:33:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2021-01-06 11:33:47,368 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 81 [2021-01-06 11:33:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:47,368 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2021-01-06 11:33:47,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:33:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2021-01-06 11:33:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 11:33:47,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:47,370 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, 1, 1, 1] [2021-01-06 11:33:47,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 11:33:47,585 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1874225040, now seen corresponding path program 14 times [2021-01-06 11:33:47,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674718836] [2021-01-06 11:33:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:47,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674718836] [2021-01-06 11:33:47,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436670112] [2021-01-06 11:33:47,889 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 [2021-01-06 11:33:48,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:48,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 11:33:48,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:48,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:48,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:33:48,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156877722] [2021-01-06 11:33:48,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:33:48,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:33:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:33:48,505 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 19 states. [2021-01-06 11:33:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:49,584 INFO L93 Difference]: Finished difference Result 661 states and 938 transitions. [2021-01-06 11:33:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:33:49,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2021-01-06 11:33:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:49,587 INFO L225 Difference]: With dead ends: 661 [2021-01-06 11:33:49,587 INFO L226 Difference]: Without dead ends: 485 [2021-01-06 11:33:49,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:33:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-01-06 11:33:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 244. [2021-01-06 11:33:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2021-01-06 11:33:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 339 transitions. [2021-01-06 11:33:49,601 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 339 transitions. Word has length 82 [2021-01-06 11:33:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:49,601 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 339 transitions. [2021-01-06 11:33:49,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:33:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 339 transitions. [2021-01-06 11:33:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 11:33:49,602 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:49,602 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] [2021-01-06 11:33:49,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 11:33:49,818 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1642999342, now seen corresponding path program 14 times [2021-01-06 11:33:49,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:49,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731728889] [2021-01-06 11:33:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:50,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731728889] [2021-01-06 11:33:50,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827917678] [2021-01-06 11:33:50,082 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 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 [2021-01-06 11:33:50,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:33:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:33:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:50,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:50,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 11:33:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206475307] [2021-01-06 11:33:50,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:33:50,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:33:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:33:50,293 INFO L87 Difference]: Start difference. First operand 244 states and 339 transitions. Second operand 21 states. [2021-01-06 11:33:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:50,737 INFO L93 Difference]: Finished difference Result 536 states and 762 transitions. [2021-01-06 11:33:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:33:50,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2021-01-06 11:33:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:50,740 INFO L225 Difference]: With dead ends: 536 [2021-01-06 11:33:50,740 INFO L226 Difference]: Without dead ends: 368 [2021-01-06 11:33:50,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:33:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-01-06 11:33:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 247. [2021-01-06 11:33:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 11:33:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 343 transitions. [2021-01-06 11:33:50,753 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 343 transitions. Word has length 84 [2021-01-06 11:33:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:50,754 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 343 transitions. [2021-01-06 11:33:50,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:33:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 343 transitions. [2021-01-06 11:33:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 11:33:50,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:50,755 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, 1, 1, 1] [2021-01-06 11:33:50,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 11:33:50,970 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:50,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2057337057, now seen corresponding path program 15 times [2021-01-06 11:33:50,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:50,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351816197] [2021-01-06 11:33:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351816197] [2021-01-06 11:33:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706782139] [2021-01-06 11:33:51,303 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 [2021-01-06 11:33:54,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 11:33:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:33:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:54,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:54,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 11:33:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843574786] [2021-01-06 11:33:54,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:33:54,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:33:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:33:54,899 INFO L87 Difference]: Start difference. First operand 247 states and 343 transitions. Second operand 20 states. [2021-01-06 11:33:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:56,393 INFO L93 Difference]: Finished difference Result 664 states and 941 transitions. [2021-01-06 11:33:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:33:56,393 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2021-01-06 11:33:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:56,395 INFO L225 Difference]: With dead ends: 664 [2021-01-06 11:33:56,395 INFO L226 Difference]: Without dead ends: 488 [2021-01-06 11:33:56,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:33:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-01-06 11:33:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 247. [2021-01-06 11:33:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 11:33:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 342 transitions. [2021-01-06 11:33:56,410 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 342 transitions. Word has length 85 [2021-01-06 11:33:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 342 transitions. [2021-01-06 11:33:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:33:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 342 transitions. [2021-01-06 11:33:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 11:33:56,412 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:56,412 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] [2021-01-06 11:33:56,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:33:56,617 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash -302954079, now seen corresponding path program 15 times [2021-01-06 11:33:56,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:56,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77235235] [2021-01-06 11:33:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:56,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77235235] [2021-01-06 11:33:56,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079773802] [2021-01-06 11:33:56,899 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 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 [2021-01-06 11:33:57,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-01-06 11:33:57,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:33:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:57,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:57,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 11:33:57,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430287817] [2021-01-06 11:33:57,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:33:57,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:33:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:33:57,548 INFO L87 Difference]: Start difference. First operand 247 states and 342 transitions. Second operand 22 states. [2021-01-06 11:33:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:33:58,038 INFO L93 Difference]: Finished difference Result 539 states and 765 transitions. [2021-01-06 11:33:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:33:58,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2021-01-06 11:33:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:33:58,041 INFO L225 Difference]: With dead ends: 539 [2021-01-06 11:33:58,041 INFO L226 Difference]: Without dead ends: 371 [2021-01-06 11:33:58,042 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 [2021-01-06 11:33:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-01-06 11:33:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 250. [2021-01-06 11:33:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2021-01-06 11:33:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 346 transitions. [2021-01-06 11:33:58,056 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 346 transitions. Word has length 87 [2021-01-06 11:33:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:33:58,056 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 346 transitions. [2021-01-06 11:33:58,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:33:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 346 transitions. [2021-01-06 11:33:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 11:33:58,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:33:58,057 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, 1, 1, 1] [2021-01-06 11:33:58,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 11:33:58,261 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:33:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:33:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 829360432, now seen corresponding path program 16 times [2021-01-06 11:33:58,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:33:58,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586455477] [2021-01-06 11:33:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:33:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:33:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586455477] [2021-01-06 11:33:58,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037976322] [2021-01-06 11:33:58,628 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 [2021-01-06 11:33:58,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:33:58,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:33:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 11:33:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:33:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:33:59,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:33:59,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 11:33:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989468537] [2021-01-06 11:33:59,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:33:59,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:33:59,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:33:59,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:33:59,299 INFO L87 Difference]: Start difference. First operand 250 states and 346 transitions. Second operand 21 states. [2021-01-06 11:34:00,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:00,840 INFO L93 Difference]: Finished difference Result 667 states and 944 transitions. [2021-01-06 11:34:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:34:00,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2021-01-06 11:34:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:00,843 INFO L225 Difference]: With dead ends: 667 [2021-01-06 11:34:00,843 INFO L226 Difference]: Without dead ends: 491 [2021-01-06 11:34:00,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:34:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-01-06 11:34:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 250. [2021-01-06 11:34:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2021-01-06 11:34:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 345 transitions. [2021-01-06 11:34:00,859 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 345 transitions. Word has length 88 [2021-01-06 11:34:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:00,859 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 345 transitions. [2021-01-06 11:34:00,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:34:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 345 transitions. [2021-01-06 11:34:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 11:34:00,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:00,860 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] [2021-01-06 11:34:01,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 11:34:01,075 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -735540366, now seen corresponding path program 16 times [2021-01-06 11:34:01,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:01,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952367711] [2021-01-06 11:34:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952367711] [2021-01-06 11:34:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263504213] [2021-01-06 11:34:01,383 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 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 [2021-01-06 11:34:01,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:34:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:34:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:01,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:01,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 11:34:01,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103441479] [2021-01-06 11:34:01,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:34:01,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:01,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:34:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:34:01,597 INFO L87 Difference]: Start difference. First operand 250 states and 345 transitions. Second operand 23 states. [2021-01-06 11:34:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:01,824 INFO L93 Difference]: Finished difference Result 542 states and 768 transitions. [2021-01-06 11:34:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:34:01,825 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2021-01-06 11:34:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:01,827 INFO L225 Difference]: With dead ends: 542 [2021-01-06 11:34:01,828 INFO L226 Difference]: Without dead ends: 374 [2021-01-06 11:34:01,828 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 [2021-01-06 11:34:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-01-06 11:34:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 253. [2021-01-06 11:34:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2021-01-06 11:34:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 349 transitions. [2021-01-06 11:34:01,844 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 349 transitions. Word has length 90 [2021-01-06 11:34:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:01,844 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 349 transitions. [2021-01-06 11:34:01,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:34:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 349 transitions. [2021-01-06 11:34:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 11:34:01,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:01,845 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, 1, 1, 1] [2021-01-06 11:34:02,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:02,060 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash 304087423, now seen corresponding path program 17 times [2021-01-06 11:34:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:02,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156467770] [2021-01-06 11:34:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156467770] [2021-01-06 11:34:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700073111] [2021-01-06 11:34:02,463 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 [2021-01-06 11:34:02,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 11:34:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 11:34:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:03,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:03,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 11:34:03,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562494935] [2021-01-06 11:34:03,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:34:03,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:03,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:34:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:34:03,128 INFO L87 Difference]: Start difference. First operand 253 states and 349 transitions. Second operand 22 states. [2021-01-06 11:34:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:04,814 INFO L93 Difference]: Finished difference Result 670 states and 947 transitions. [2021-01-06 11:34:04,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:34:04,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2021-01-06 11:34:04,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:04,816 INFO L225 Difference]: With dead ends: 670 [2021-01-06 11:34:04,817 INFO L226 Difference]: Without dead ends: 494 [2021-01-06 11:34:04,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:34:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-01-06 11:34:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 253. [2021-01-06 11:34:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2021-01-06 11:34:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 348 transitions. [2021-01-06 11:34:04,838 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 348 transitions. Word has length 91 [2021-01-06 11:34:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:04,838 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 348 transitions. [2021-01-06 11:34:04,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:34:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 348 transitions. [2021-01-06 11:34:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 11:34:04,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:04,840 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] [2021-01-06 11:34:05,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 11:34:05,055 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1283238913, now seen corresponding path program 17 times [2021-01-06 11:34:05,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:05,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097067479] [2021-01-06 11:34:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:05,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097067479] [2021-01-06 11:34:05,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154159837] [2021-01-06 11:34:05,384 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 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 [2021-01-06 11:34:05,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 11:34:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:34:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:05,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:05,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 11:34:05,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990156165] [2021-01-06 11:34:05,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:34:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:34:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:34:05,615 INFO L87 Difference]: Start difference. First operand 253 states and 348 transitions. Second operand 24 states. [2021-01-06 11:34:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:06,148 INFO L93 Difference]: Finished difference Result 545 states and 771 transitions. [2021-01-06 11:34:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:34:06,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2021-01-06 11:34:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:06,150 INFO L225 Difference]: With dead ends: 545 [2021-01-06 11:34:06,150 INFO L226 Difference]: Without dead ends: 377 [2021-01-06 11:34:06,150 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 [2021-01-06 11:34:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-01-06 11:34:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 256. [2021-01-06 11:34:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2021-01-06 11:34:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 352 transitions. [2021-01-06 11:34:06,165 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 352 transitions. Word has length 93 [2021-01-06 11:34:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:06,165 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 352 transitions. [2021-01-06 11:34:06,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:34:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 352 transitions. [2021-01-06 11:34:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 11:34:06,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:06,166 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, 1, 1, 1] [2021-01-06 11:34:06,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:06,382 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1538264368, now seen corresponding path program 18 times [2021-01-06 11:34:06,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924301597] [2021-01-06 11:34:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:06,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924301597] [2021-01-06 11:34:06,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039755292] [2021-01-06 11:34:06,812 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 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 [2021-01-06 11:34:07,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 11:34:07,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:07,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 11:34:07,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:08,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:08,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 11:34:08,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712171652] [2021-01-06 11:34:08,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:34:08,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:34:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:34:08,144 INFO L87 Difference]: Start difference. First operand 256 states and 352 transitions. Second operand 23 states. [2021-01-06 11:34:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:10,056 INFO L93 Difference]: Finished difference Result 673 states and 950 transitions. [2021-01-06 11:34:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:34:10,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 94 [2021-01-06 11:34:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:10,059 INFO L225 Difference]: With dead ends: 673 [2021-01-06 11:34:10,059 INFO L226 Difference]: Without dead ends: 497 [2021-01-06 11:34:10,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 19 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:34:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-01-06 11:34:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 256. [2021-01-06 11:34:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2021-01-06 11:34:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 351 transitions. [2021-01-06 11:34:10,075 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 351 transitions. Word has length 94 [2021-01-06 11:34:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:10,075 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 351 transitions. [2021-01-06 11:34:10,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:34:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 351 transitions. [2021-01-06 11:34:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 11:34:10,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:10,077 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] [2021-01-06 11:34:10,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 11:34:10,281 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:10,281 INFO L82 PathProgramCache]: Analyzing trace with hash 309693714, now seen corresponding path program 18 times [2021-01-06 11:34:10,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:10,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465963180] [2021-01-06 11:34:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:10,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465963180] [2021-01-06 11:34:10,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988426105] [2021-01-06 11:34:10,629 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 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 [2021-01-06 11:34:12,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 11:34:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:12,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:34:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:13,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:13,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 11:34:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092947479] [2021-01-06 11:34:13,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:34:13,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:34:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:34:13,073 INFO L87 Difference]: Start difference. First operand 256 states and 351 transitions. Second operand 25 states. [2021-01-06 11:34:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:13,410 INFO L93 Difference]: Finished difference Result 548 states and 774 transitions. [2021-01-06 11:34:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:34:13,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2021-01-06 11:34:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:13,413 INFO L225 Difference]: With dead ends: 548 [2021-01-06 11:34:13,413 INFO L226 Difference]: Without dead ends: 380 [2021-01-06 11:34:13,413 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 [2021-01-06 11:34:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-01-06 11:34:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 259. [2021-01-06 11:34:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 11:34:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 355 transitions. [2021-01-06 11:34:13,430 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 355 transitions. Word has length 96 [2021-01-06 11:34:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:13,431 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 355 transitions. [2021-01-06 11:34:13,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:34:13,431 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 355 transitions. [2021-01-06 11:34:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 11:34:13,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:13,432 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, 1, 1, 1] [2021-01-06 11:34:13,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:13,636 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1653394465, now seen corresponding path program 19 times [2021-01-06 11:34:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:13,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916550665] [2021-01-06 11:34:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916550665] [2021-01-06 11:34:14,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657885915] [2021-01-06 11:34:14,101 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 [2021-01-06 11:34:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 11:34:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:14,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:14,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 11:34:14,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341966664] [2021-01-06 11:34:14,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:34:14,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:34:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:34:14,893 INFO L87 Difference]: Start difference. First operand 259 states and 355 transitions. Second operand 24 states. [2021-01-06 11:34:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:16,230 INFO L93 Difference]: Finished difference Result 676 states and 953 transitions. [2021-01-06 11:34:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 11:34:16,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2021-01-06 11:34:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:16,233 INFO L225 Difference]: With dead ends: 676 [2021-01-06 11:34:16,233 INFO L226 Difference]: Without dead ends: 500 [2021-01-06 11:34:16,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 19 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:34:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-01-06 11:34:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 259. [2021-01-06 11:34:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 11:34:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 354 transitions. [2021-01-06 11:34:16,250 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 354 transitions. Word has length 97 [2021-01-06 11:34:16,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:16,250 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 354 transitions. [2021-01-06 11:34:16,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:34:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 354 transitions. [2021-01-06 11:34:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 11:34:16,251 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:16,251 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] [2021-01-06 11:34:16,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 11:34:16,465 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1338820193, now seen corresponding path program 19 times [2021-01-06 11:34:16,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:16,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997320848] [2021-01-06 11:34:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:16,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997320848] [2021-01-06 11:34:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215612667] [2021-01-06 11:34:16,894 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 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 [2021-01-06 11:34:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:34:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:17,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:17,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 11:34:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741712626] [2021-01-06 11:34:17,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:34:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:34:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:34:17,106 INFO L87 Difference]: Start difference. First operand 259 states and 354 transitions. Second operand 26 states. [2021-01-06 11:34:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:17,350 INFO L93 Difference]: Finished difference Result 551 states and 777 transitions. [2021-01-06 11:34:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:34:17,351 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2021-01-06 11:34:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:17,353 INFO L225 Difference]: With dead ends: 551 [2021-01-06 11:34:17,353 INFO L226 Difference]: Without dead ends: 383 [2021-01-06 11:34:17,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:34:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-01-06 11:34:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 262. [2021-01-06 11:34:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 11:34:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 358 transitions. [2021-01-06 11:34:17,370 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 358 transitions. Word has length 99 [2021-01-06 11:34:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:17,371 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 358 transitions. [2021-01-06 11:34:17,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:34:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 358 transitions. [2021-01-06 11:34:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 11:34:17,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:17,372 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, 1, 1, 1] [2021-01-06 11:34:17,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 11:34:17,586 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash 184755312, now seen corresponding path program 20 times [2021-01-06 11:34:17,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:17,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503779998] [2021-01-06 11:34:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:18,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503779998] [2021-01-06 11:34:18,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903005386] [2021-01-06 11:34:18,088 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 [2021-01-06 11:34:18,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:34:18,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 11:34:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 11:34:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14677966] [2021-01-06 11:34:19,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 11:34:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 11:34:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:34:19,165 INFO L87 Difference]: Start difference. First operand 262 states and 358 transitions. Second operand 25 states. [2021-01-06 11:34:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:20,996 INFO L93 Difference]: Finished difference Result 679 states and 956 transitions. [2021-01-06 11:34:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 11:34:20,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2021-01-06 11:34:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:21,000 INFO L225 Difference]: With dead ends: 679 [2021-01-06 11:34:21,000 INFO L226 Difference]: Without dead ends: 503 [2021-01-06 11:34:21,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 20 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:34:21,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-01-06 11:34:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 262. [2021-01-06 11:34:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 11:34:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 357 transitions. [2021-01-06 11:34:21,017 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 357 transitions. Word has length 100 [2021-01-06 11:34:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:21,018 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 357 transitions. [2021-01-06 11:34:21,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 11:34:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 357 transitions. [2021-01-06 11:34:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 11:34:21,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:21,019 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] [2021-01-06 11:34:21,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:21,223 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1725770062, now seen corresponding path program 20 times [2021-01-06 11:34:21,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:21,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737824455] [2021-01-06 11:34:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:21,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737824455] [2021-01-06 11:34:21,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330529521] [2021-01-06 11:34:21,674 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 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 [2021-01-06 11:34:21,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:34:21,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 11:34:21,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:21,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:21,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 11:34:21,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418245438] [2021-01-06 11:34:21,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:34:21,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:34:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:34:21,928 INFO L87 Difference]: Start difference. First operand 262 states and 357 transitions. Second operand 27 states. [2021-01-06 11:34:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:22,108 INFO L93 Difference]: Finished difference Result 554 states and 780 transitions. [2021-01-06 11:34:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:34:22,109 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2021-01-06 11:34:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:22,110 INFO L225 Difference]: With dead ends: 554 [2021-01-06 11:34:22,110 INFO L226 Difference]: Without dead ends: 386 [2021-01-06 11:34:22,111 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 [2021-01-06 11:34:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-01-06 11:34:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 265. [2021-01-06 11:34:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-01-06 11:34:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 361 transitions. [2021-01-06 11:34:22,127 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 361 transitions. Word has length 102 [2021-01-06 11:34:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:22,127 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 361 transitions. [2021-01-06 11:34:22,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:34:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 361 transitions. [2021-01-06 11:34:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 11:34:22,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:22,129 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, 1, 1, 1] [2021-01-06 11:34:22,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 11:34:22,342 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:22,343 INFO L82 PathProgramCache]: Analyzing trace with hash -328262081, now seen corresponding path program 21 times [2021-01-06 11:34:22,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:22,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128220746] [2021-01-06 11:34:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:22,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128220746] [2021-01-06 11:34:22,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575251029] [2021-01-06 11:34:22,878 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 [2021-01-06 11:34:23,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 11:34:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 11:34:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:24,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:24,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 11:34:24,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534847799] [2021-01-06 11:34:24,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:34:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:34:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:34:24,665 INFO L87 Difference]: Start difference. First operand 265 states and 361 transitions. Second operand 26 states. [2021-01-06 11:34:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:26,979 INFO L93 Difference]: Finished difference Result 682 states and 959 transitions. [2021-01-06 11:34:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 11:34:26,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 103 [2021-01-06 11:34:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:26,982 INFO L225 Difference]: With dead ends: 682 [2021-01-06 11:34:26,982 INFO L226 Difference]: Without dead ends: 506 [2021-01-06 11:34:26,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 83 SyntacticMatches, 21 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:34:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-01-06 11:34:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 265. [2021-01-06 11:34:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-01-06 11:34:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 360 transitions. [2021-01-06 11:34:27,000 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 360 transitions. Word has length 103 [2021-01-06 11:34:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:27,000 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 360 transitions. [2021-01-06 11:34:27,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:34:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 360 transitions. [2021-01-06 11:34:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 11:34:27,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:27,002 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] [2021-01-06 11:34:27,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:27,206 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash -814245695, now seen corresponding path program 21 times [2021-01-06 11:34:27,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:27,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309513637] [2021-01-06 11:34:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:27,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309513637] [2021-01-06 11:34:27,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146583761] [2021-01-06 11:34:27,646 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 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 [2021-01-06 11:34:30,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-01-06 11:34:30,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 11:34:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:30,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:30,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 11:34:30,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867033441] [2021-01-06 11:34:30,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 11:34:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 11:34:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 11:34:30,668 INFO L87 Difference]: Start difference. First operand 265 states and 360 transitions. Second operand 28 states. [2021-01-06 11:34:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:30,882 INFO L93 Difference]: Finished difference Result 557 states and 783 transitions. [2021-01-06 11:34:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 11:34:30,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2021-01-06 11:34:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:30,885 INFO L225 Difference]: With dead ends: 557 [2021-01-06 11:34:30,885 INFO L226 Difference]: Without dead ends: 389 [2021-01-06 11:34:30,885 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 [2021-01-06 11:34:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-01-06 11:34:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 268. [2021-01-06 11:34:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2021-01-06 11:34:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 364 transitions. [2021-01-06 11:34:30,902 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 364 transitions. Word has length 105 [2021-01-06 11:34:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:30,903 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 364 transitions. [2021-01-06 11:34:30,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 11:34:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 364 transitions. [2021-01-06 11:34:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 11:34:30,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:30,904 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, 1, 1, 1] [2021-01-06 11:34:31,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:31,109 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2135777776, now seen corresponding path program 22 times [2021-01-06 11:34:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329707622] [2021-01-06 11:34:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:31,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329707622] [2021-01-06 11:34:31,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961926440] [2021-01-06 11:34:31,684 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 [2021-01-06 11:34:31,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:34:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 11:34:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:32,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:32,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 11:34:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298997984] [2021-01-06 11:34:32,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:34:32,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:34:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:34:32,766 INFO L87 Difference]: Start difference. First operand 268 states and 364 transitions. Second operand 27 states. [2021-01-06 11:34:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:35,212 INFO L93 Difference]: Finished difference Result 685 states and 962 transitions. [2021-01-06 11:34:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:34:35,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2021-01-06 11:34:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:35,217 INFO L225 Difference]: With dead ends: 685 [2021-01-06 11:34:35,217 INFO L226 Difference]: Without dead ends: 509 [2021-01-06 11:34:35,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 85 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:34:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-01-06 11:34:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 268. [2021-01-06 11:34:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2021-01-06 11:34:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 363 transitions. [2021-01-06 11:34:35,232 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 363 transitions. Word has length 106 [2021-01-06 11:34:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:35,232 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 363 transitions. [2021-01-06 11:34:35,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:34:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 363 transitions. [2021-01-06 11:34:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 11:34:35,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:35,233 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:34:35,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 11:34:35,443 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1624926290, now seen corresponding path program 22 times [2021-01-06 11:34:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:35,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213157208] [2021-01-06 11:34:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:34:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:35,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213157208] [2021-01-06 11:34:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2954807] [2021-01-06 11:34:35,930 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:36,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:34:36,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:34:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 11:34:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:34:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:34:36,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:34:36,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 11:34:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840690316] [2021-01-06 11:34:36,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 11:34:36,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:34:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 11:34:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:34:36,155 INFO L87 Difference]: Start difference. First operand 268 states and 363 transitions. Second operand 29 states. [2021-01-06 11:34:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:34:36,810 INFO L93 Difference]: Finished difference Result 560 states and 786 transitions. [2021-01-06 11:34:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 11:34:36,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2021-01-06 11:34:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:34:36,812 INFO L225 Difference]: With dead ends: 560 [2021-01-06 11:34:36,812 INFO L226 Difference]: Without dead ends: 392 [2021-01-06 11:34:36,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:34:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-01-06 11:34:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2021-01-06 11:34:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 11:34:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 367 transitions. [2021-01-06 11:34:36,829 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 367 transitions. Word has length 108 [2021-01-06 11:34:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:34:36,829 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 367 transitions. [2021-01-06 11:34:36,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 11:34:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 367 transitions. [2021-01-06 11:34:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 11:34:36,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:34:36,831 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, 1, 1, 1] [2021-01-06 11:34:37,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:34:37,046 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:34:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:34:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash 464109727, now seen corresponding path program 23 times [2021-01-06 11:34:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:34:37,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294295878] [2021-01-06 11:34:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:34:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:34:37,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:34:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:34:37,156 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:34:37,200 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:34:37,200 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:34:37,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-01-06 11:34:37,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:34:37 BoogieIcfgContainer [2021-01-06 11:34:37,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:34:37,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:34:37,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:34:37,335 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:34:37,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:33:10" (3/4) ... [2021-01-06 11:34:37,339 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 11:34:37,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:34:37,342 INFO L168 Benchmark]: Toolchain (without parser) took 88159.03 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 131.5 MB in the beginning and 84.9 MB in the end (delta: 46.6 MB). Peak memory consumption was 100.3 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,342 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:34:37,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.06 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 117.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,344 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.15 ms. Allocated memory is still 156.2 MB. Free memory was 117.7 MB in the beginning and 114.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,344 INFO L168 Benchmark]: Boogie Preprocessor took 90.20 ms. Allocated memory is still 156.2 MB. Free memory was 114.7 MB in the beginning and 112.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,344 INFO L168 Benchmark]: RCFGBuilder took 977.67 ms. Allocated memory is still 156.2 MB. Free memory was 112.2 MB in the beginning and 99.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,345 INFO L168 Benchmark]: TraceAbstraction took 86620.32 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 98.7 MB in the beginning and 84.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 68.3 MB. Max. memory is 8.0 GB. [2021-01-06 11:34:37,345 INFO L168 Benchmark]: Witness Printer took 4.20 ms. Allocated memory is still 209.7 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:34:37,347 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 156.2 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 376.06 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 117.8 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 81.15 ms. Allocated memory is still 156.2 MB. Free memory was 117.7 MB in the beginning and 114.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 90.20 ms. Allocated memory is still 156.2 MB. Free memory was 114.7 MB in the beginning and 112.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 977.67 ms. Allocated memory is still 156.2 MB. Free memory was 112.2 MB in the beginning and 99.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 86620.32 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 98.7 MB in the beginning and 84.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 68.3 MB. Max. memory is 8.0 GB. * Witness Printer took 4.20 ms. Allocated memory is still 209.7 MB. Free memory is still 84.9 MB. 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: 86.4s, OverallIterations: 57, TraceHistogramMax: 26, AutomataDifference: 33.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13229 SDtfs, 10320 SDslu, 105151 SDs, 0 SdLazy, 42514 SolverSat, 993 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4317 GetRequests, 3314 SyntacticMatches, 258 SemanticMatches, 745 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 56 MinimizatonAttempts, 8886 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 15.5s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 7377 NumberOfCodeBlocks, 7362 NumberOfCodeBlocksAsserted, 387 NumberOfCheckSat, 7162 ConstructedInterpolants, 0 QuantifiedInterpolants, 2057325 SizeOfPredicates, 86 NumberOfNonLiveVariables, 11794 ConjunctsInSsa, 1115 ConjunctsInUnsatCore, 106 InterpolantComputations, 9 PerfectInterpolantSequences, 28/29097 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...