/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:50:55,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:50:55,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:50:55,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:50:55,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:50:55,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:50:55,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:50:55,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:50:55,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:50:55,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:50:55,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:50:55,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:50:55,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:50:55,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:50:55,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:50:55,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:50:55,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:50:55,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:50:55,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:50:55,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:50:55,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:50:55,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:50:55,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:50:55,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:50:55,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:50:55,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:50:55,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:50:55,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:50:55,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:50:55,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:50:55,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:50:55,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:50:55,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:50:55,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:50:55,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:50:55,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:50:55,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:50:55,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:50:55,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:50:55,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:50:55,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:50:55,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:50:55,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:50:55,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:50:55,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:50:55,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:50:55,186 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:50:55,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:50:55,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:50:55,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:50:55,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:50:55,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:50:55,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:50:55,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:50:55,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:50:55,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:50:55,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:50:55,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:50:55,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:50:55,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:55,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:50:55,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:50:55,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:50:55,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:50:55,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:50:55,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:50:55,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:50:55,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:50:55,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:50:55,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:50:55,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:50:55,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:50:55,660 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:50:55,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-01-06 16:50:55,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/416f16b4b/73e712ab859f4f9da7bbce8e8c4bbd47/FLAG714cbf105 [2021-01-06 16:50:56,416 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:50:56,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-01-06 16:50:56,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/416f16b4b/73e712ab859f4f9da7bbce8e8c4bbd47/FLAG714cbf105 [2021-01-06 16:50:56,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/416f16b4b/73e712ab859f4f9da7bbce8e8c4bbd47 [2021-01-06 16:50:56,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:50:56,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:50:56,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:56,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:50:56,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:50:56,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:56" (1/1) ... [2021-01-06 16:50:56,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463ad6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:56, skipping insertion in model container [2021-01-06 16:50:56,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:56" (1/1) ... [2021-01-06 16:50:56,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:50:56,836 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:50:57,028 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] left hand side expression in assignment: lhs: VariableLHS[~__return_720~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] [2021-01-06 16:50:57,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:57,051 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2021-01-06 16:50:57,073 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] left hand side expression in assignment: lhs: VariableLHS[~__return_720~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] [2021-01-06 16:50:57,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:57,096 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:50:57,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57 WrapperNode [2021-01-06 16:50:57,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:57,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:57,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:50:57,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:50:57,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:57,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:50:57,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:50:57,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:50:57,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... [2021-01-06 16:50:57,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:50:57,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:50:57,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:50:57,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:50:57,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:50:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:50:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:50:57,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:50:57,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:50:57,651 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:50:57,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:57 BoogieIcfgContainer [2021-01-06 16:50:57,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:50:57,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:50:57,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:50:57,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:50:57,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:50:56" (1/3) ... [2021-01-06 16:50:57,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5c75ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:57, skipping insertion in model container [2021-01-06 16:50:57,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:57" (2/3) ... [2021-01-06 16:50:57,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5c75ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:57, skipping insertion in model container [2021-01-06 16:50:57,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:57" (3/3) ... [2021-01-06 16:50:57,667 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2021-01-06 16:50:57,675 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:50:57,681 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:50:57,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:50:57,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:50:57,741 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:50:57,741 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:50:57,741 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:50:57,741 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:50:57,742 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:50:57,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:50:57,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:50:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-06 16:50:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:57,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:57,769 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] [2021-01-06 16:50:57,769 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2021-01-06 16:50:57,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:57,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948293347] [2021-01-06 16:50:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:58,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948293347] [2021-01-06 16:50:58,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:58,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859199007] [2021-01-06 16:50:58,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:58,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:58,123 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2021-01-06 16:50:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:58,283 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2021-01-06 16:50:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:58,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 16:50:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:58,302 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:50:58,302 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:50:58,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:50:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:50:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:50:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 16:50:58,352 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2021-01-06 16:50:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:58,353 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 16:50:58,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 16:50:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:58,354 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:58,354 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] [2021-01-06 16:50:58,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:50:58,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2021-01-06 16:50:58,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:58,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076715176] [2021-01-06 16:50:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076715176] [2021-01-06 16:50:58,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:58,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:50:58,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468546989] [2021-01-06 16:50:58,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:50:58,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:58,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:50:58,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:50:58,415 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2021-01-06 16:50:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:58,504 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-01-06 16:50:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:50:58,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-01-06 16:50:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:58,507 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:50:58,507 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:50:58,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:50:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:50:58,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:50:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:50:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-01-06 16:50:58,528 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2021-01-06 16:50:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:58,528 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-01-06 16:50:58,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:50:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-01-06 16:50:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:58,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:58,531 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] [2021-01-06 16:50:58,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:50:58,531 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2021-01-06 16:50:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027188461] [2021-01-06 16:50:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:58,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027188461] [2021-01-06 16:50:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:58,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:58,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859457190] [2021-01-06 16:50:58,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:58,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:58,631 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 3 states. [2021-01-06 16:50:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:58,748 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2021-01-06 16:50:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:58,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 16:50:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:58,752 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:50:58,752 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:50:58,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:50:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 16:50:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:50:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-01-06 16:50:58,770 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2021-01-06 16:50:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:58,771 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-01-06 16:50:58,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-01-06 16:50:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:58,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:58,778 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] [2021-01-06 16:50:58,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:50:58,779 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2021-01-06 16:50:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:58,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534767578] [2021-01-06 16:50:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:58,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534767578] [2021-01-06 16:50:58,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:58,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 16:50:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237467182] [2021-01-06 16:50:58,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:50:58,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:50:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:50:58,900 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 6 states. [2021-01-06 16:50:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,023 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-01-06 16:50:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:50:59,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-01-06 16:50:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,025 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:50:59,025 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:50:59,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:50:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:50:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 16:50:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:50:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-01-06 16:50:59,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2021-01-06 16:50:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,034 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-01-06 16:50:59,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:50:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-01-06 16:50:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:59,035 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,035 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] [2021-01-06 16:50:59,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:50:59,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2021-01-06 16:50:59,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100850671] [2021-01-06 16:50:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100850671] [2021-01-06 16:50:59,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 16:50:59,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952615272] [2021-01-06 16:50:59,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:50:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:50:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:50:59,120 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2021-01-06 16:50:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,218 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-06 16:50:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:50:59,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 16:50:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,220 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:50:59,220 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:50:59,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:50:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:50:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:50:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:50:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 16:50:59,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-01-06 16:50:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,227 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 16:50:59,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:50:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 16:50:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:59,228 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,228 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] [2021-01-06 16:50:59,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 16:50:59,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2021-01-06 16:50:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472549106] [2021-01-06 16:50:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472549106] [2021-01-06 16:50:59,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:50:59,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820925737] [2021-01-06 16:50:59,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:50:59,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:50:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:59,274 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2021-01-06 16:50:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,323 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-01-06 16:50:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:50:59,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 16:50:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,325 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:50:59,325 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:50:59,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:50:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:50:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:50:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:50:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-01-06 16:50:59,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2021-01-06 16:50:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,331 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-01-06 16:50:59,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:50:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-01-06 16:50:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:59,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,333 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] [2021-01-06 16:50:59,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:50:59,333 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,334 INFO L82 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2021-01-06 16:50:59,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727833577] [2021-01-06 16:50:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727833577] [2021-01-06 16:50:59,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-01-06 16:50:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653312627] [2021-01-06 16:50:59,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:50:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:50:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:59,436 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 11 states. [2021-01-06 16:50:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,528 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 16:50:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:50:59,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 16:50:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,530 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:50:59,530 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:50:59,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:50:59,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:50:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:50:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 16:50:59,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-01-06 16:50:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,536 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 16:50:59,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:50:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 16:50:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:50:59,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,537 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] [2021-01-06 16:50:59,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 16:50:59,537 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2021-01-06 16:50:59,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373872663] [2021-01-06 16:50:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373872663] [2021-01-06 16:50:59,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:59,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-01-06 16:50:59,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433832666] [2021-01-06 16:50:59,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:50:59,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:50:59,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:59,706 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2021-01-06 16:50:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:59,827 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 16:50:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:50:59,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 16:50:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:59,828 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:50:59,828 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:50:59,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:50:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:50:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:50:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 16:50:59,834 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-01-06 16:50:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:59,835 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 16:50:59,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:50:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 16:50:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:59,836 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:59,836 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] [2021-01-06 16:50:59,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 16:50:59,837 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2021-01-06 16:50:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:59,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519555605] [2021-01-06 16:50:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519555605] [2021-01-06 16:50:59,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865525408] [2021-01-06 16:50:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:00,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:51:00,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046438231] [2021-01-06 16:51:00,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:51:00,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:51:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:00,253 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2021-01-06 16:51:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:00,370 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-01-06 16:51:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:51:00,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-01-06 16:51:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:00,372 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:51:00,372 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:51:00,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 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 16:51:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:51:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:51:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:51:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-01-06 16:51:00,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2021-01-06 16:51:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:00,377 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-01-06 16:51:00,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:51:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-01-06 16:51:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:51:00,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:00,378 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 16:51:00,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:51:00,594 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 756112099, now seen corresponding path program 2 times [2021-01-06 16:51:00,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:00,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331908432] [2021-01-06 16:51:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331908432] [2021-01-06 16:51:00,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378029931] [2021-01-06 16:51:00,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:00,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:51:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234819679] [2021-01-06 16:51:00,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:51:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:51:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:00,905 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2021-01-06 16:51:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,019 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 16:51:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:51:01,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2021-01-06 16:51:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:01,020 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:51:01,020 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:51:01,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:51:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:51:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:51:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 16:51:01,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2021-01-06 16:51:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:01,026 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 16:51:01,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:51:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 16:51:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:51:01,027 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:01,027 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 16:51:01,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:51:01,241 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 3 times [2021-01-06 16:51:01,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:01,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103292133] [2021-01-06 16:51:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:01,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103292133] [2021-01-06 16:51:01,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941206041] [2021-01-06 16:51:01,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:01,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:51:01,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:51:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:51:01,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2021-01-06 16:51:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389231156] [2021-01-06 16:51:01,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:51:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:51:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:01,589 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2021-01-06 16:51:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,718 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-01-06 16:51:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:51:01,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-01-06 16:51:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:01,723 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:51:01,723 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:51:01,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:51:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 16:51:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:51:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 16:51:01,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-01-06 16:51:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:01,732 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 16:51:01,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:51:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 16:51:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:51:01,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:01,734 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 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 16:51:01,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 16:51:01,950 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419607, now seen corresponding path program 4 times [2021-01-06 16:51:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:01,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213272093] [2021-01-06 16:51:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213272093] [2021-01-06 16:51:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951933274] [2021-01-06 16:51:02,138 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:51:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:02,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:02,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:51:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025009757] [2021-01-06 16:51:02,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:51:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:51:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:02,319 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 17 states. [2021-01-06 16:51:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:02,402 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-01-06 16:51:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:51:02,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2021-01-06 16:51:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:02,403 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:51:02,403 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:51:02,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 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 16:51:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:51:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 16:51:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:51:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 16:51:02,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-01-06 16:51:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:02,419 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 16:51:02,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:51:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 16:51:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:51:02,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:02,426 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 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 16:51:02,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,639 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 516774580, now seen corresponding path program 5 times [2021-01-06 16:51:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:02,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247873595] [2021-01-06 16:51:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:51:02,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247873595] [2021-01-06 16:51:02,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824435834] [2021-01-06 16:51:02,841 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 16:51:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:51:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 16:51:03,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:03,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2021-01-06 16:51:03,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760865131] [2021-01-06 16:51:03,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:51:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:51:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:03,026 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 21 states. [2021-01-06 16:51:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:03,150 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-01-06 16:51:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:51:03,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2021-01-06 16:51:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:03,151 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:51:03,151 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:51:03,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:51:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 16:51:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:51:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 16:51:03,156 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2021-01-06 16:51:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:03,156 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 16:51:03,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:51:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 16:51:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:03,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:03,157 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 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 16:51:03,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:51:03,371 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2055346949, now seen corresponding path program 6 times [2021-01-06 16:51:03,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:03,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063034283] [2021-01-06 16:51:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:03,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063034283] [2021-01-06 16:51:03,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904325861] [2021-01-06 16:51:03,600 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:03,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:51:03,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:03,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:51:03,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:03,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:03,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:51:03,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323405465] [2021-01-06 16:51:03,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:51:03,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:51:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:51:03,745 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2021-01-06 16:51:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:03,861 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-01-06 16:51:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:51:03,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2021-01-06 16:51:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:03,862 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:51:03,862 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:51:03,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 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 16:51:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:51:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:51:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:51:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-01-06 16:51:03,867 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-01-06 16:51:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:03,867 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-01-06 16:51:03,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:51:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-01-06 16:51:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:51:03,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:03,868 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 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 16:51:04,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:04,084 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash -891324766, now seen corresponding path program 7 times [2021-01-06 16:51:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:04,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187863016] [2021-01-06 16:51:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:04,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187863016] [2021-01-06 16:51:04,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786542759] [2021-01-06 16:51:04,312 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:04,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:04,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:04,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:51:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990839037] [2021-01-06 16:51:04,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:51:04,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:51:04,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:04,444 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 20 states. [2021-01-06 16:51:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:04,564 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-01-06 16:51:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:51:04,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2021-01-06 16:51:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:04,565 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:51:04,565 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:51:04,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 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 16:51:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:51:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:51:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:51:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 16:51:04,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-01-06 16:51:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:04,571 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 16:51:04,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:51:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 16:51:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:04,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:04,572 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 4, 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 16:51:04,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:51:04,786 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2035572479, now seen corresponding path program 8 times [2021-01-06 16:51:04,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:04,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079400581] [2021-01-06 16:51:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:51:05,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079400581] [2021-01-06 16:51:05,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129482014] [2021-01-06 16:51:05,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 16:51:05,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:05,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 16:51:05,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918392904] [2021-01-06 16:51:05,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:51:05,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:05,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:51:05,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:05,314 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2021-01-06 16:51:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:05,502 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-01-06 16:51:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:51:05,503 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 47 [2021-01-06 16:51:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:05,504 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:51:05,504 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:51:05,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:51:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 16:51:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:51:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 16:51:05,509 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2021-01-06 16:51:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:05,509 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 16:51:05,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:51:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 16:51:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 16:51:05,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:05,510 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 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 16:51:05,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:51:05,724 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 512283024, now seen corresponding path program 9 times [2021-01-06 16:51:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:05,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989889686] [2021-01-06 16:51:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 16:51:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989889686] [2021-01-06 16:51:06,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401774983] [2021-01-06 16:51:06,011 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 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 16:51:06,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 16:51:06,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:06,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:51:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 16:51:06,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:06,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-01-06 16:51:06,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320666090] [2021-01-06 16:51:06,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:51:06,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:06,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:51:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:51:06,318 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 28 states. [2021-01-06 16:51:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:06,494 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-01-06 16:51:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:51:06,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2021-01-06 16:51:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:06,496 INFO L225 Difference]: With dead ends: 73 [2021-01-06 16:51:06,496 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 16:51:06,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:51:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 16:51:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-01-06 16:51:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 16:51:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-01-06 16:51:06,501 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-01-06 16:51:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:06,501 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-01-06 16:51:06,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:51:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-01-06 16:51:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 16:51:06,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:06,502 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 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 16:51:06,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:51:06,716 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:06,717 INFO L82 PathProgramCache]: Analyzing trace with hash 632258215, now seen corresponding path program 10 times [2021-01-06 16:51:06,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:06,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060348568] [2021-01-06 16:51:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:07,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060348568] [2021-01-06 16:51:07,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988445954] [2021-01-06 16:51:07,004 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 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 16:51:07,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:51:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:07,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:07,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:51:07,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851647612] [2021-01-06 16:51:07,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:51:07,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:51:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:51:07,161 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 23 states. [2021-01-06 16:51:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:07,304 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-01-06 16:51:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:51:07,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2021-01-06 16:51:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:07,305 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:51:07,305 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:51:07,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 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 16:51:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:51:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 16:51:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:51:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 16:51:07,311 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2021-01-06 16:51:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:07,312 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 16:51:07,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:51:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 16:51:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:51:07,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:07,313 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 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 16:51:07,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:51:07,529 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash 698467204, now seen corresponding path program 11 times [2021-01-06 16:51:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:07,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927007793] [2021-01-06 16:51:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 16:51:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927007793] [2021-01-06 16:51:07,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381973973] [2021-01-06 16:51:07,891 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 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 16:51:07,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:51:07,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 16:51:08,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:08,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 16:51:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929407287] [2021-01-06 16:51:08,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:51:08,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:51:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:08,332 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 33 states. [2021-01-06 16:51:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:08,501 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-01-06 16:51:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:51:08,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 59 [2021-01-06 16:51:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:08,502 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:51:08,502 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 16:51:08,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 16:51:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 16:51:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 16:51:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-01-06 16:51:08,525 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 59 [2021-01-06 16:51:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:08,526 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-01-06 16:51:08,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:51:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-01-06 16:51:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 16:51:08,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:08,527 INFO L422 BasicCegarLoop]: trace histogram [22, 12, 10, 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 16:51:08,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:08,728 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash -821055537, now seen corresponding path program 12 times [2021-01-06 16:51:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:08,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800760004] [2021-01-06 16:51:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800760004] [2021-01-06 16:51:09,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858919858] [2021-01-06 16:51:09,124 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 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 16:51:09,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 16:51:09,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:09,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:51:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 247 proven. 156 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:09,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:09,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:51:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994995105] [2021-01-06 16:51:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:51:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:51:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:51:09,291 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2021-01-06 16:51:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:09,445 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-01-06 16:51:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:51:09,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2021-01-06 16:51:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:09,446 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:51:09,446 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:51:09,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:51:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:51:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-01-06 16:51:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 16:51:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-01-06 16:51:09,454 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2021-01-06 16:51:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:09,454 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-01-06 16:51:09,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:51:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-01-06 16:51:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 16:51:09,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:09,461 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 10, 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 16:51:09,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:09,676 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1433093228, now seen corresponding path program 13 times [2021-01-06 16:51:09,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:09,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351396350] [2021-01-06 16:51:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:10,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351396350] [2021-01-06 16:51:10,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613454842] [2021-01-06 16:51:10,063 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 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 16:51:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:10,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:10,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:51:10,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180657511] [2021-01-06 16:51:10,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:51:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:51:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:10,228 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 26 states. [2021-01-06 16:51:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:10,396 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-01-06 16:51:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:51:10,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 69 [2021-01-06 16:51:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:10,397 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:51:10,397 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:51:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 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 16:51:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:51:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 16:51:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:51:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 16:51:10,402 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-01-06 16:51:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:10,402 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 16:51:10,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:51:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 16:51:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 16:51:10,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:10,403 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 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 16:51:10,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:51:10,617 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1288428087, now seen corresponding path program 14 times [2021-01-06 16:51:10,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:10,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701570575] [2021-01-06 16:51:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701570575] [2021-01-06 16:51:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399968579] [2021-01-06 16:51:11,032 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 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 16:51:11,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:51:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:11,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:51:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548095727] [2021-01-06 16:51:11,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:51:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:51:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:51:11,202 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2021-01-06 16:51:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:11,343 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-01-06 16:51:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:51:11,344 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2021-01-06 16:51:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:11,344 INFO L225 Difference]: With dead ends: 96 [2021-01-06 16:51:11,345 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:51:11,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 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 16:51:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:51:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-01-06 16:51:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 16:51:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-01-06 16:51:11,349 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2021-01-06 16:51:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:11,349 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-01-06 16:51:11,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:51:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-01-06 16:51:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 16:51:11,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:11,350 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 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 16:51:11,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:11,563 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1035328538, now seen corresponding path program 15 times [2021-01-06 16:51:11,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:11,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435201139] [2021-01-06 16:51:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 304 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 16:51:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435201139] [2021-01-06 16:51:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278817344] [2021-01-06 16:51:11,990 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 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 16:51:12,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:51:12,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:51:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 16:51:12,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:12,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-01-06 16:51:12,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720389725] [2021-01-06 16:51:12,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:12,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:12,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:12,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:12,623 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 38 states. [2021-01-06 16:51:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:12,833 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-01-06 16:51:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:51:12,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 73 [2021-01-06 16:51:12,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:12,834 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:51:12,834 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 16:51:12,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 16:51:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 16:51:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:51:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 16:51:12,839 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-01-06 16:51:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:12,840 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 16:51:12,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 16:51:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 16:51:12,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:12,841 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 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 16:51:13,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:51:13,057 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:13,058 INFO L82 PathProgramCache]: Analyzing trace with hash -782408963, now seen corresponding path program 16 times [2021-01-06 16:51:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:13,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712454301] [2021-01-06 16:51:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712454301] [2021-01-06 16:51:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282239338] [2021-01-06 16:51:13,568 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 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 16:51:13,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:13,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:51:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:13,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:13,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:51:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218859483] [2021-01-06 16:51:13,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:51:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:13,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:51:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:51:13,780 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2021-01-06 16:51:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:13,940 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-01-06 16:51:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:51:13,941 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2021-01-06 16:51:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:13,942 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:51:13,942 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:51:13,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 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 16:51:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:51:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-01-06 16:51:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 16:51:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-01-06 16:51:13,947 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2021-01-06 16:51:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:13,948 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-01-06 16:51:13,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:51:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-01-06 16:51:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 16:51:13,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:13,949 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 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 16:51:14,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:14,163 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash -376334502, now seen corresponding path program 17 times [2021-01-06 16:51:14,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:14,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730888977] [2021-01-06 16:51:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 378 proven. 306 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 16:51:14,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730888977] [2021-01-06 16:51:14,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419375348] [2021-01-06 16:51:14,653 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 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 16:51:14,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 16:51:14,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:51:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 405 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 16:51:15,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:15,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16] total 43 [2021-01-06 16:51:15,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371104160] [2021-01-06 16:51:15,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:51:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:51:15,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:51:15,454 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 43 states. [2021-01-06 16:51:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:15,707 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-01-06 16:51:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:51:15,712 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 79 [2021-01-06 16:51:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:15,713 INFO L225 Difference]: With dead ends: 113 [2021-01-06 16:51:15,713 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:51:15,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:51:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:51:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-01-06 16:51:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 16:51:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-01-06 16:51:15,718 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 79 [2021-01-06 16:51:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:15,719 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-01-06 16:51:15,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:51:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-01-06 16:51:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 16:51:15,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:15,720 INFO L422 BasicCegarLoop]: trace histogram [32, 18, 14, 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 16:51:15,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:51:15,936 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash -467322203, now seen corresponding path program 18 times [2021-01-06 16:51:15,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:15,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313645373] [2021-01-06 16:51:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 513 proven. 342 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 16:51:16,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313645373] [2021-01-06 16:51:16,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798056888] [2021-01-06 16:51:16,449 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 16:51:16,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-01-06 16:51:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:51:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 256 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-01-06 16:51:17,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:17,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 47 [2021-01-06 16:51:17,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588802472] [2021-01-06 16:51:17,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:51:17,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:51:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:17,406 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 47 states. [2021-01-06 16:51:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:17,678 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-01-06 16:51:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:51:17,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 87 [2021-01-06 16:51:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:17,679 INFO L225 Difference]: With dead ends: 127 [2021-01-06 16:51:17,680 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:51:17,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:51:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-01-06 16:51:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 16:51:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-01-06 16:51:17,686 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2021-01-06 16:51:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:17,686 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-01-06 16:51:17,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:51:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-01-06 16:51:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 16:51:17,688 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:17,688 INFO L422 BasicCegarLoop]: trace histogram [36, 19, 17, 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 16:51:17,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:51:17,902 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 319507632, now seen corresponding path program 19 times [2021-01-06 16:51:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:17,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540720105] [2021-01-06 16:51:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:51:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540720105] [2021-01-06 16:51:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502937118] [2021-01-06 16:51:18,526 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 16:51:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:51:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 660 proven. 380 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:51:18,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:18,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:51:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30390631] [2021-01-06 16:51:18,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:51:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:51:18,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:51:18,719 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 32 states. [2021-01-06 16:51:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:18,886 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-01-06 16:51:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:51:18,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 95 [2021-01-06 16:51:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:18,887 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:51:18,888 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:51:18,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:51:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:51:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-01-06 16:51:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:51:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-01-06 16:51:18,893 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2021-01-06 16:51:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:18,894 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-01-06 16:51:18,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:51:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-01-06 16:51:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:51:18,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:18,895 INFO L422 BasicCegarLoop]: trace histogram [37, 20, 17, 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 16:51:19,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:51:19,110 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:19,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1493173197, now seen corresponding path program 20 times [2021-01-06 16:51:19,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:19,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914735884] [2021-01-06 16:51:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:51:19,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914735884] [2021-01-06 16:51:19,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414892786] [2021-01-06 16:51:19,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:19,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:51:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:51:19,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:19,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:51:19,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320127245] [2021-01-06 16:51:19,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:51:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:51:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:19,867 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 33 states. [2021-01-06 16:51:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:20,049 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-01-06 16:51:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:51:20,050 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2021-01-06 16:51:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:20,050 INFO L225 Difference]: With dead ends: 136 [2021-01-06 16:51:20,051 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:51:20,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:51:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-01-06 16:51:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 16:51:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-01-06 16:51:20,055 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2021-01-06 16:51:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:20,056 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-01-06 16:51:20,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:51:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-01-06 16:51:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 16:51:20,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:20,057 INFO L422 BasicCegarLoop]: trace histogram [38, 21, 17, 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 16:51:20,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:51:20,268 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:20,268 INFO L82 PathProgramCache]: Analyzing trace with hash -190617686, now seen corresponding path program 21 times [2021-01-06 16:51:20,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:20,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532206342] [2021-01-06 16:51:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 16:51:20,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532206342] [2021-01-06 16:51:20,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155636250] [2021-01-06 16:51:20,995 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 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 16:51:21,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-01-06 16:51:21,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 735 proven. 289 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 16:51:22,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:22,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20] total 51 [2021-01-06 16:51:22,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082007689] [2021-01-06 16:51:22,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:51:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:22,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:51:22,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:51:22,147 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2021-01-06 16:51:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:22,471 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2021-01-06 16:51:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:51:22,472 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2021-01-06 16:51:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:22,473 INFO L225 Difference]: With dead ends: 141 [2021-01-06 16:51:22,473 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:51:22,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:51:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:51:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 16:51:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 16:51:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-01-06 16:51:22,480 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2021-01-06 16:51:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:22,480 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-01-06 16:51:22,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:51:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-01-06 16:51:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 16:51:22,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:22,481 INFO L422 BasicCegarLoop]: trace histogram [40, 22, 18, 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 16:51:22,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:51:22,695 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:22,696 INFO L82 PathProgramCache]: Analyzing trace with hash -363246719, now seen corresponding path program 22 times [2021-01-06 16:51:22,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:22,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354892316] [2021-01-06 16:51:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:51:23,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354892316] [2021-01-06 16:51:23,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017550407] [2021-01-06 16:51:23,365 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 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 16:51:23,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:23,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:51:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 805 proven. 506 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:51:23,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:23,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:51:23,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984560856] [2021-01-06 16:51:23,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:51:23,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:51:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:23,566 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 35 states. [2021-01-06 16:51:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:23,789 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2021-01-06 16:51:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:51:23,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2021-01-06 16:51:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:23,790 INFO L225 Difference]: With dead ends: 144 [2021-01-06 16:51:23,790 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:51:23,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:51:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-01-06 16:51:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 16:51:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-01-06 16:51:23,797 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2021-01-06 16:51:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:23,797 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-01-06 16:51:23,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:51:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-01-06 16:51:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 16:51:23,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:23,799 INFO L422 BasicCegarLoop]: trace histogram [41, 23, 18, 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 16:51:24,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:24,013 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1285057122, now seen corresponding path program 23 times [2021-01-06 16:51:24,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:24,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245063898] [2021-01-06 16:51:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 16:51:24,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245063898] [2021-01-06 16:51:24,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449599856] [2021-01-06 16:51:24,813 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 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 16:51:24,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:51:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:51:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 400 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 16:51:26,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:26,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 23] total 56 [2021-01-06 16:51:26,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382994938] [2021-01-06 16:51:26,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:51:26,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:51:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:51:26,135 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 56 states. [2021-01-06 16:51:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:26,450 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-01-06 16:51:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:51:26,451 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 105 [2021-01-06 16:51:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:26,452 INFO L225 Difference]: With dead ends: 153 [2021-01-06 16:51:26,452 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:51:26,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:51:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:51:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-01-06 16:51:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 16:51:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-01-06 16:51:26,459 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2021-01-06 16:51:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:26,460 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-01-06 16:51:26,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:51:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-01-06 16:51:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-01-06 16:51:26,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:26,461 INFO L422 BasicCegarLoop]: trace histogram [45, 24, 21, 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 16:51:26,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:51:26,674 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:26,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1116419159, now seen corresponding path program 24 times [2021-01-06 16:51:26,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:26,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282513689] [2021-01-06 16:51:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282513689] [2021-01-06 16:51:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811173080] [2021-01-06 16:51:27,392 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 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 16:51:27,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-01-06 16:51:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:51:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1025 proven. 600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:27,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:27,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:51:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456912634] [2021-01-06 16:51:27,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:51:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:51:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:51:27,670 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 37 states. [2021-01-06 16:51:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:27,904 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-01-06 16:51:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:51:27,905 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2021-01-06 16:51:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:27,906 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:51:27,906 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 16:51:27,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:51:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 16:51:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-01-06 16:51:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 16:51:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-01-06 16:51:27,913 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2021-01-06 16:51:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:27,913 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-01-06 16:51:27,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:51:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-01-06 16:51:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 16:51:27,914 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:27,915 INFO L422 BasicCegarLoop]: trace histogram [46, 25, 21, 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 16:51:28,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:28,129 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash 110548358, now seen corresponding path program 25 times [2021-01-06 16:51:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:28,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583181933] [2021-01-06 16:51:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:28,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583181933] [2021-01-06 16:51:28,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966924751] [2021-01-06 16:51:28,974 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 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 16:51:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:51:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:29,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:29,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:51:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531330143] [2021-01-06 16:51:29,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:29,197 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 38 states. [2021-01-06 16:51:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:29,429 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2021-01-06 16:51:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:51:29,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2021-01-06 16:51:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:29,436 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:51:29,436 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:51:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:51:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-01-06 16:51:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 16:51:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-01-06 16:51:29,442 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2021-01-06 16:51:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-01-06 16:51:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-01-06 16:51:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 16:51:29,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:29,443 INFO L422 BasicCegarLoop]: trace histogram [47, 26, 21, 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 16:51:29,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:51:29,656 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1889674205, now seen corresponding path program 26 times [2021-01-06 16:51:29,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:29,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686613489] [2021-01-06 16:51:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686613489] [2021-01-06 16:51:30,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329735160] [2021-01-06 16:51:30,561 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 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 16:51:30,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:51:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1107 proven. 702 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:30,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:30,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:51:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599237965] [2021-01-06 16:51:30,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:51:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:51:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:30,777 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 39 states. [2021-01-06 16:51:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:31,000 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-01-06 16:51:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:51:31,001 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 117 [2021-01-06 16:51:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:31,002 INFO L225 Difference]: With dead ends: 164 [2021-01-06 16:51:31,002 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:51:31,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:51:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-01-06 16:51:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 16:51:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-01-06 16:51:31,009 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2021-01-06 16:51:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:31,009 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-01-06 16:51:31,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:51:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-01-06 16:51:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 16:51:31,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:31,010 INFO L422 BasicCegarLoop]: trace histogram [48, 27, 21, 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 16:51:31,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:51:31,224 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash 41791360, now seen corresponding path program 27 times [2021-01-06 16:51:31,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:31,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017642150] [2021-01-06 16:51:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1148 proven. 756 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 16:51:32,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017642150] [2021-01-06 16:51:32,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389185357] [2021-01-06 16:51:32,135 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 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 16:51:32,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-01-06 16:51:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1161 proven. 441 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-01-06 16:51:33,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:33,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 61 [2021-01-06 16:51:33,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628115671] [2021-01-06 16:51:33,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:51:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:51:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:51:33,774 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 61 states. [2021-01-06 16:51:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:34,133 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2021-01-06 16:51:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:51:34,135 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 119 [2021-01-06 16:51:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:34,136 INFO L225 Difference]: With dead ends: 169 [2021-01-06 16:51:34,136 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 16:51:34,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:51:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 16:51:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-01-06 16:51:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 16:51:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-01-06 16:51:34,142 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2021-01-06 16:51:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:34,142 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-01-06 16:51:34,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:51:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-01-06 16:51:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 16:51:34,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:34,143 INFO L422 BasicCegarLoop]: trace histogram [50, 28, 22, 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 16:51:34,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:51:34,358 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash -948329129, now seen corresponding path program 28 times [2021-01-06 16:51:34,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:34,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323828230] [2021-01-06 16:51:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:51:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323828230] [2021-01-06 16:51:35,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350451079] [2021-01-06 16:51:35,378 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 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 16:51:35,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:51:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:51:35,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:35,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:51:35,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926533328] [2021-01-06 16:51:35,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:51:35,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:51:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:35,621 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 41 states. [2021-01-06 16:51:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:35,813 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-01-06 16:51:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:51:35,813 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 123 [2021-01-06 16:51:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:35,814 INFO L225 Difference]: With dead ends: 172 [2021-01-06 16:51:35,814 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:51:35,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:51:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-01-06 16:51:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 16:51:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-01-06 16:51:35,820 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2021-01-06 16:51:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:35,820 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-01-06 16:51:35,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:51:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-01-06 16:51:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-01-06 16:51:35,821 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:35,821 INFO L422 BasicCegarLoop]: trace histogram [51, 29, 22, 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 16:51:36,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:51:36,035 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:36,035 INFO L82 PathProgramCache]: Analyzing trace with hash 567459572, now seen corresponding path program 29 times [2021-01-06 16:51:36,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:36,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679841411] [2021-01-06 16:51:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1290 proven. 870 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 16:51:37,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679841411] [2021-01-06 16:51:37,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977848312] [2021-01-06 16:51:37,102 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 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 16:51:37,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-01-06 16:51:37,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:51:37,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 625 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-01-06 16:51:39,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:39,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 67 [2021-01-06 16:51:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440008145] [2021-01-06 16:51:39,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:51:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:51:39,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:51:39,052 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 67 states. [2021-01-06 16:51:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:39,430 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2021-01-06 16:51:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:51:39,431 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 125 [2021-01-06 16:51:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:39,432 INFO L225 Difference]: With dead ends: 183 [2021-01-06 16:51:39,432 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 16:51:39,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:51:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 16:51:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-01-06 16:51:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 16:51:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-01-06 16:51:39,438 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 125 [2021-01-06 16:51:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:39,438 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-01-06 16:51:39,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:51:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-01-06 16:51:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 16:51:39,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:39,439 INFO L422 BasicCegarLoop]: trace histogram [56, 30, 26, 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 16:51:39,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:51:39,640 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 651845945, now seen corresponding path program 30 times [2021-01-06 16:51:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:39,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437381959] [2021-01-06 16:51:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1581 proven. 930 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 16:51:40,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437381959] [2021-01-06 16:51:40,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631933609] [2021-01-06 16:51:40,723 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 16:51:40,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2021-01-06 16:51:40,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:51:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1596 proven. 784 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-01-06 16:51:43,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:43,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31] total 71 [2021-01-06 16:51:43,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759173610] [2021-01-06 16:51:43,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:51:43,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:51:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:51:43,006 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 71 states. [2021-01-06 16:51:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:43,425 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2021-01-06 16:51:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:51:43,426 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 135 [2021-01-06 16:51:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:43,427 INFO L225 Difference]: With dead ends: 199 [2021-01-06 16:51:43,427 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 16:51:43,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:51:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 16:51:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-01-06 16:51:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 16:51:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-01-06 16:51:43,437 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 135 [2021-01-06 16:51:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:43,439 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-01-06 16:51:43,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:51:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-01-06 16:51:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-01-06 16:51:43,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:43,441 INFO L422 BasicCegarLoop]: trace histogram [60, 31, 29, 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 16:51:43,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:43,657 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 403121732, now seen corresponding path program 31 times [2021-01-06 16:51:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:43,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005025638] [2021-01-06 16:51:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:51:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005025638] [2021-01-06 16:51:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794440732] [2021-01-06 16:51:44,855 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 16:51:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:51:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1824 proven. 992 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:51:45,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:45,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:51:45,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381942214] [2021-01-06 16:51:45,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:51:45,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:51:45,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:51:45,113 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 44 states. [2021-01-06 16:51:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:45,385 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2021-01-06 16:51:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:51:45,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 143 [2021-01-06 16:51:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:45,387 INFO L225 Difference]: With dead ends: 206 [2021-01-06 16:51:45,387 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:51:45,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:51:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:51:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-01-06 16:51:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 16:51:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-01-06 16:51:45,394 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2021-01-06 16:51:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:45,395 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-01-06 16:51:45,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:51:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-01-06 16:51:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-01-06 16:51:45,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:45,396 INFO L422 BasicCegarLoop]: trace histogram [61, 32, 29, 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 16:51:45,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:51:45,610 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1973964641, now seen corresponding path program 32 times [2021-01-06 16:51:45,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:45,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957714026] [2021-01-06 16:51:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:51:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957714026] [2021-01-06 16:51:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378001114] [2021-01-06 16:51:46,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:46,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:51:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1881 proven. 1056 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:51:47,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:47,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:51:47,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734153206] [2021-01-06 16:51:47,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:51:47,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:51:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:51:47,048 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 45 states. [2021-01-06 16:51:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:47,310 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-01-06 16:51:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:51:47,311 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 145 [2021-01-06 16:51:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:47,313 INFO L225 Difference]: With dead ends: 208 [2021-01-06 16:51:47,313 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 16:51:47,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:51:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 16:51:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-01-06 16:51:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 16:51:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-01-06 16:51:47,319 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2021-01-06 16:51:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:47,319 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-01-06 16:51:47,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:51:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-01-06 16:51:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 16:51:47,320 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:47,320 INFO L422 BasicCegarLoop]: trace histogram [62, 33, 29, 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 16:51:47,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:51:47,534 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -274488002, now seen corresponding path program 33 times [2021-01-06 16:51:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:47,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19604461] [2021-01-06 16:51:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1938 proven. 1122 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-01-06 16:51:48,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19604461] [2021-01-06 16:51:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741326220] [2021-01-06 16:51:48,796 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 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 16:51:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-01-06 16:51:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:51:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1947 proven. 841 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-01-06 16:51:51,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:51,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 32] total 75 [2021-01-06 16:51:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027857008] [2021-01-06 16:51:51,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:51:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:51:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:51:51,473 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2021-01-06 16:51:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,916 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2021-01-06 16:51:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:51:51,916 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2021-01-06 16:51:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,917 INFO L225 Difference]: With dead ends: 213 [2021-01-06 16:51:51,917 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 16:51:51,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:51:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 16:51:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 16:51:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 16:51:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-01-06 16:51:51,924 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2021-01-06 16:51:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,924 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-01-06 16:51:51,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:51:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-01-06 16:51:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 16:51:51,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,925 INFO L422 BasicCegarLoop]: trace histogram [64, 34, 30, 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 16:51:52,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:52,137 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1397712405, now seen corresponding path program 34 times [2021-01-06 16:51:52,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:52,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431762555] [2021-01-06 16:51:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 16:51:53,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431762555] [2021-01-06 16:51:53,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292435536] [2021-01-06 16:51:53,452 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 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 16:51:53,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:51:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2065 proven. 1190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 16:51:53,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:53,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:51:53,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904338196] [2021-01-06 16:51:53,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:51:53,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:51:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:53,736 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 47 states. [2021-01-06 16:51:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:54,015 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-01-06 16:51:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:51:54,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 151 [2021-01-06 16:51:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:54,017 INFO L225 Difference]: With dead ends: 216 [2021-01-06 16:51:54,017 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 16:51:54,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 16:51:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-01-06 16:51:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 16:51:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-01-06 16:51:54,024 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2021-01-06 16:51:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:54,024 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-01-06 16:51:54,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:51:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-01-06 16:51:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 16:51:54,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:54,026 INFO L422 BasicCegarLoop]: trace histogram [65, 35, 30, 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 16:51:54,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:51:54,241 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:54,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1098392114, now seen corresponding path program 35 times [2021-01-06 16:51:54,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:54,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358648748] [2021-01-06 16:51:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2124 proven. 1260 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-01-06 16:51:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358648748] [2021-01-06 16:51:55,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684748884] [2021-01-06 16:51:55,611 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 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 16:51:55,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:51:55,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:55,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2145 proven. 1024 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-01-06 16:51:58,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:58,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35] total 80 [2021-01-06 16:51:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041993993] [2021-01-06 16:51:58,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:51:58,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:51:58,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:51:58,644 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 80 states. [2021-01-06 16:51:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,118 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2021-01-06 16:51:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:51:59,119 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 153 [2021-01-06 16:51:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,120 INFO L225 Difference]: With dead ends: 225 [2021-01-06 16:51:59,121 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 16:51:59,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:51:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 16:51:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-01-06 16:51:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 16:51:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-01-06 16:51:59,127 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 153 [2021-01-06 16:51:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,128 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-01-06 16:51:59,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:51:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-01-06 16:51:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 16:51:59,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,129 INFO L422 BasicCegarLoop]: trace histogram [69, 36, 33, 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 16:51:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:59,340 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash -510719171, now seen corresponding path program 36 times [2021-01-06 16:51:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56879710] [2021-01-06 16:51:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:00,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56879710] [2021-01-06 16:52:00,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573063704] [2021-01-06 16:52:00,692 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 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 16:52:00,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2021-01-06 16:52:00,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:52:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2405 proven. 1332 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:01,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:52:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334772046] [2021-01-06 16:52:01,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:52:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:52:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:01,054 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 49 states. [2021-01-06 16:52:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:01,306 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2021-01-06 16:52:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:52:01,307 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 161 [2021-01-06 16:52:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:01,308 INFO L225 Difference]: With dead ends: 232 [2021-01-06 16:52:01,309 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 16:52:01,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 16:52:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-01-06 16:52:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 16:52:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-01-06 16:52:01,316 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2021-01-06 16:52:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:01,316 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-01-06 16:52:01,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:52:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-01-06 16:52:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-01-06 16:52:01,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:01,318 INFO L422 BasicCegarLoop]: trace histogram [70, 37, 33, 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 16:52:01,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 16:52:01,532 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 249890586, now seen corresponding path program 37 times [2021-01-06 16:52:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830755496] [2021-01-06 16:52:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:03,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830755496] [2021-01-06 16:52:03,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827990738] [2021-01-06 16:52:03,033 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 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 16:52:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:52:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:03,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:03,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:52:03,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108429942] [2021-01-06 16:52:03,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:52:03,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:52:03,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:03,315 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 50 states. [2021-01-06 16:52:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:03,601 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2021-01-06 16:52:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:52:03,601 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 163 [2021-01-06 16:52:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:03,602 INFO L225 Difference]: With dead ends: 234 [2021-01-06 16:52:03,602 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:52:03,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:52:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-01-06 16:52:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 16:52:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-01-06 16:52:03,609 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2021-01-06 16:52:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:03,609 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-01-06 16:52:03,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:52:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-01-06 16:52:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 16:52:03,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:03,610 INFO L422 BasicCegarLoop]: trace histogram [71, 38, 33, 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 16:52:03,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:52:03,825 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:03,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1051426743, now seen corresponding path program 38 times [2021-01-06 16:52:03,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:03,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343959240] [2021-01-06 16:52:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343959240] [2021-01-06 16:52:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638595320] [2021-01-06 16:52:05,362 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 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 16:52:05,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:05,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:52:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2535 proven. 1482 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:05,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:05,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:52:05,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831444977] [2021-01-06 16:52:05,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:52:05,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:52:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:05,651 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 51 states. [2021-01-06 16:52:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:05,939 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-01-06 16:52:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:52:05,940 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 165 [2021-01-06 16:52:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:05,941 INFO L225 Difference]: With dead ends: 236 [2021-01-06 16:52:05,942 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 16:52:05,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 16:52:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-01-06 16:52:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 16:52:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-01-06 16:52:05,948 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2021-01-06 16:52:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:05,948 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-01-06 16:52:05,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:52:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-01-06 16:52:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-01-06 16:52:05,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:05,949 INFO L422 BasicCegarLoop]: trace histogram [72, 39, 33, 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 16:52:06,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:52:06,164 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1766439660, now seen corresponding path program 39 times [2021-01-06 16:52:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:06,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130237036] [2021-01-06 16:52:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2600 proven. 1560 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-01-06 16:52:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130237036] [2021-01-06 16:52:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491462810] [2021-01-06 16:52:07,766 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 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 16:52:07,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-01-06 16:52:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:52:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2613 proven. 1089 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-01-06 16:52:11,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:11,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 36] total 85 [2021-01-06 16:52:11,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454870829] [2021-01-06 16:52:11,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:52:11,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:11,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:52:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:52:11,016 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 85 states. [2021-01-06 16:52:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:11,481 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2021-01-06 16:52:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:52:11,481 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 167 [2021-01-06 16:52:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:11,483 INFO L225 Difference]: With dead ends: 241 [2021-01-06 16:52:11,483 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 16:52:11,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:52:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 16:52:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-01-06 16:52:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 16:52:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-01-06 16:52:11,490 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2021-01-06 16:52:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:11,491 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-01-06 16:52:11,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:52:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-01-06 16:52:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 16:52:11,491 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:11,492 INFO L422 BasicCegarLoop]: trace histogram [74, 40, 34, 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 16:52:11,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:52:11,693 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -502982677, now seen corresponding path program 40 times [2021-01-06 16:52:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:11,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217609879] [2021-01-06 16:52:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-01-06 16:52:13,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217609879] [2021-01-06 16:52:13,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344501278] [2021-01-06 16:52:13,394 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 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 16:52:13,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:13,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:52:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-01-06 16:52:13,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:13,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:52:13,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628795580] [2021-01-06 16:52:13,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:52:13,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:52:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:13,723 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 53 states. [2021-01-06 16:52:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:14,015 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-01-06 16:52:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:52:14,016 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 171 [2021-01-06 16:52:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:14,017 INFO L225 Difference]: With dead ends: 244 [2021-01-06 16:52:14,017 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:52:14,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:52:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-01-06 16:52:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2021-01-06 16:52:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-01-06 16:52:14,029 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2021-01-06 16:52:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:14,029 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-01-06 16:52:14,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:52:14,030 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-01-06 16:52:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 16:52:14,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:14,031 INFO L422 BasicCegarLoop]: trace histogram [75, 41, 34, 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 16:52:14,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:14,245 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 41 times [2021-01-06 16:52:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70230409] [2021-01-06 16:52:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70230409] [2021-01-06 16:52:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484291459] [2021-01-06 16:52:18,980 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 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 16:52:19,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-01-06 16:52:19,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:52:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2850 proven. 1369 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-01-06 16:52:19,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:19,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 40] total 90 [2021-01-06 16:52:19,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315018823] [2021-01-06 16:52:19,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 16:52:19,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 16:52:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:52:19,714 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 90 states. [2021-01-06 16:52:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:20,254 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2021-01-06 16:52:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 16:52:20,254 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 173 [2021-01-06 16:52:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:20,256 INFO L225 Difference]: With dead ends: 186 [2021-01-06 16:52:20,256 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 16:52:20,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:52:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 16:52:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-01-06 16:52:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 16:52:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2021-01-06 16:52:20,263 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 173 [2021-01-06 16:52:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:20,263 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2021-01-06 16:52:20,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 16:52:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2021-01-06 16:52:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 16:52:20,264 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:20,264 INFO L422 BasicCegarLoop]: trace histogram [79, 41, 38, 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 16:52:20,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:52:20,467 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 42 times [2021-01-06 16:52:20,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:20,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16302718] [2021-01-06 16:52:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16302718] [2021-01-06 16:52:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775104345] [2021-01-06 16:52:25,577 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 16:52:25,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:52:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2021-01-06 16:52:26,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:26,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2021-01-06 16:52:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422198411] [2021-01-06 16:52:26,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 16:52:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 16:52:26,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:52:26,168 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 92 states. [2021-01-06 16:52:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:26,716 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-01-06 16:52:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:52:26,717 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 181 [2021-01-06 16:52:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:26,718 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:52:26,718 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 16:52:26,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:52:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 16:52:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 16:52:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 16:52:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-01-06 16:52:26,726 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2021-01-06 16:52:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:26,727 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-01-06 16:52:26,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 16:52:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-01-06 16:52:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 16:52:26,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:26,728 INFO L422 BasicCegarLoop]: trace histogram [81, 41, 40, 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 16:52:26,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:52:26,942 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 43 times [2021-01-06 16:52:26,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:26,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830625751] [2021-01-06 16:52:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830625751] [2021-01-06 16:52:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823684141] [2021-01-06 16:52:32,443 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 16:52:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:52:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:32,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:32,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-01-06 16:52:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240580806] [2021-01-06 16:52:32,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:52:32,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:32,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:52:32,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:52:32,822 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 94 states. [2021-01-06 16:52:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:33,348 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2021-01-06 16:52:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:52:33,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 185 [2021-01-06 16:52:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:33,350 INFO L225 Difference]: With dead ends: 192 [2021-01-06 16:52:33,351 INFO L226 Difference]: Without dead ends: 189 [2021-01-06 16:52:33,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:52:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-01-06 16:52:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-01-06 16:52:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2021-01-06 16:52:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-01-06 16:52:33,358 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2021-01-06 16:52:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:33,359 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-01-06 16:52:33,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:52:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-01-06 16:52:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-01-06 16:52:33,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:33,360 INFO L422 BasicCegarLoop]: trace histogram [82, 41, 41, 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 16:52:33,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:33,574 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 44 times [2021-01-06 16:52:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:33,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378618300] [2021-01-06 16:52:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:39,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378618300] [2021-01-06 16:52:39,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732521426] [2021-01-06 16:52:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:39,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:39,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:52:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:39,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:39,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-01-06 16:52:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815222286] [2021-01-06 16:52:39,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-01-06 16:52:39,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-01-06 16:52:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:52:39,623 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 95 states. [2021-01-06 16:52:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:40,278 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-01-06 16:52:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 16:52:40,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2021-01-06 16:52:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:40,280 INFO L225 Difference]: With dead ends: 194 [2021-01-06 16:52:40,280 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 16:52:40,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:52:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 16:52:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-01-06 16:52:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 16:52:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-01-06 16:52:40,287 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2021-01-06 16:52:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:40,288 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-01-06 16:52:40,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2021-01-06 16:52:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-01-06 16:52:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 16:52:40,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:40,289 INFO L422 BasicCegarLoop]: trace histogram [83, 42, 41, 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 16:52:40,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:52:40,503 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 45 times [2021-01-06 16:52:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:40,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925601105] [2021-01-06 16:52:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925601105] [2021-01-06 16:52:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437142522] [2021-01-06 16:52:46,335 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 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 16:52:46,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2021-01-06 16:52:46,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 94 conjunts are in the unsatisfiable core [2021-01-06 16:52:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:46,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:46,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-01-06 16:52:46,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846482172] [2021-01-06 16:52:46,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-01-06 16:52:46,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-01-06 16:52:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:46,817 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2021-01-06 16:52:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:47,405 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-01-06 16:52:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-01-06 16:52:47,406 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2021-01-06 16:52:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:47,408 INFO L225 Difference]: With dead ends: 196 [2021-01-06 16:52:47,408 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 16:52:47,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 16:52:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-01-06 16:52:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 16:52:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-01-06 16:52:47,416 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2021-01-06 16:52:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:47,416 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-01-06 16:52:47,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2021-01-06 16:52:47,417 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-01-06 16:52:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 16:52:47,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:47,418 INFO L422 BasicCegarLoop]: trace histogram [84, 43, 41, 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 16:52:47,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:47,632 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 46 times [2021-01-06 16:52:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:47,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567464929] [2021-01-06 16:52:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:53,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567464929] [2021-01-06 16:52:53,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144348471] [2021-01-06 16:52:53,687 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 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 16:52:53,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 16:52:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:54,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:54,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-01-06 16:52:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282862562] [2021-01-06 16:52:54,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 16:52:54,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:54,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 16:52:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:54,091 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 97 states. [2021-01-06 16:52:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:54,754 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2021-01-06 16:52:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-01-06 16:52:54,755 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 191 [2021-01-06 16:52:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:54,760 INFO L225 Difference]: With dead ends: 198 [2021-01-06 16:52:54,761 INFO L226 Difference]: Without dead ends: 195 [2021-01-06 16:52:54,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:52:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-01-06 16:52:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-01-06 16:52:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 16:52:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-01-06 16:52:54,768 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2021-01-06 16:52:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:54,768 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-01-06 16:52:54,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 16:52:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-01-06 16:52:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 16:52:54,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:54,770 INFO L422 BasicCegarLoop]: trace histogram [85, 44, 41, 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 16:52:54,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:52:54,984 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 47 times [2021-01-06 16:52:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:54,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519095510] [2021-01-06 16:52:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:01,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519095510] [2021-01-06 16:53:01,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956112579] [2021-01-06 16:53:01,190 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 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 16:53:01,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2021-01-06 16:53:01,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:53:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1936 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-01-06 16:53:01,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:01,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 47] total 97 [2021-01-06 16:53:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26311984] [2021-01-06 16:53:01,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 16:53:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 16:53:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:53:01,679 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 97 states. [2021-01-06 16:53:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:02,375 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-01-06 16:53:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-01-06 16:53:02,377 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 193 [2021-01-06 16:53:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:02,378 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:53:02,378 INFO L226 Difference]: Without dead ends: 197 [2021-01-06 16:53:02,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:53:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-01-06 16:53:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-01-06 16:53:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-01-06 16:53:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-01-06 16:53:02,385 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2021-01-06 16:53:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:02,386 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-01-06 16:53:02,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 16:53:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-01-06 16:53:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-01-06 16:53:02,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:02,387 INFO L422 BasicCegarLoop]: trace histogram [86, 45, 41, 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 16:53:02,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:02,602 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 48 times [2021-01-06 16:53:02,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:02,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489761333] [2021-01-06 16:53:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489761333] [2021-01-06 16:53:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058331261] [2021-01-06 16:53:09,162 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 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 16:53:09,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-01-06 16:53:09,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:53:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-01-06 16:53:09,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:09,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2021-01-06 16:53:09,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156490585] [2021-01-06 16:53:09,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-01-06 16:53:09,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-01-06 16:53:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 16:53:09,759 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2021-01-06 16:53:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:10,454 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2021-01-06 16:53:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 16:53:10,455 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2021-01-06 16:53:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:10,456 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:53:10,456 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 16:53:10,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 16:53:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 16:53:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-01-06 16:53:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 16:53:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-01-06 16:53:10,464 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2021-01-06 16:53:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:10,465 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-01-06 16:53:10,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2021-01-06 16:53:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-01-06 16:53:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-01-06 16:53:10,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:10,466 INFO L422 BasicCegarLoop]: trace histogram [87, 46, 41, 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 16:53:10,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:53:10,680 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 49 times [2021-01-06 16:53:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:10,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142313771] [2021-01-06 16:53:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:17,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142313771] [2021-01-06 16:53:17,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520726810] [2021-01-06 16:53:17,453 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 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 16:53:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 98 conjunts are in the unsatisfiable core [2021-01-06 16:53:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:17,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:17,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-01-06 16:53:17,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857827015] [2021-01-06 16:53:17,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-01-06 16:53:17,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-01-06 16:53:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 16:53:17,999 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 100 states. [2021-01-06 16:53:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:18,828 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2021-01-06 16:53:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-01-06 16:53:18,829 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 197 [2021-01-06 16:53:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:18,830 INFO L225 Difference]: With dead ends: 204 [2021-01-06 16:53:18,830 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 16:53:18,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 16:53:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 16:53:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-01-06 16:53:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-01-06 16:53:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-01-06 16:53:18,840 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2021-01-06 16:53:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:18,840 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-01-06 16:53:18,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2021-01-06 16:53:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-01-06 16:53:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-01-06 16:53:18,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:18,842 INFO L422 BasicCegarLoop]: trace histogram [88, 47, 41, 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 16:53:19,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:53:19,056 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 50 times [2021-01-06 16:53:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:19,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051512393] [2021-01-06 16:53:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:26,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051512393] [2021-01-06 16:53:26,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928656706] [2021-01-06 16:53:26,059 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 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 16:53:26,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:26,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 99 conjunts are in the unsatisfiable core [2021-01-06 16:53:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:26,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:26,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-01-06 16:53:26,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213175135] [2021-01-06 16:53:26,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-01-06 16:53:26,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-01-06 16:53:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 16:53:26,487 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 101 states. [2021-01-06 16:53:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:27,294 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2021-01-06 16:53:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-01-06 16:53:27,295 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 199 [2021-01-06 16:53:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:27,296 INFO L225 Difference]: With dead ends: 206 [2021-01-06 16:53:27,296 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 16:53:27,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 16:53:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 16:53:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-01-06 16:53:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 16:53:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-01-06 16:53:27,304 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2021-01-06 16:53:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:27,305 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-01-06 16:53:27,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2021-01-06 16:53:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-01-06 16:53:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-01-06 16:53:27,306 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:27,306 INFO L422 BasicCegarLoop]: trace histogram [89, 48, 41, 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 16:53:27,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 16:53:27,521 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 51 times [2021-01-06 16:53:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:27,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057356898] [2021-01-06 16:53:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057356898] [2021-01-06 16:53:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358004370] [2021-01-06 16:53:34,419 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:34,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 90 check-sat command(s) [2021-01-06 16:53:34,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 16:53:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:34,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:34,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-01-06 16:53:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618300725] [2021-01-06 16:53:34,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-01-06 16:53:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-01-06 16:53:34,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 16:53:34,954 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2021-01-06 16:53:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:35,757 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-01-06 16:53:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-01-06 16:53:35,758 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2021-01-06 16:53:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:35,759 INFO L225 Difference]: With dead ends: 208 [2021-01-06 16:53:35,759 INFO L226 Difference]: Without dead ends: 205 [2021-01-06 16:53:35,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 16:53:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-01-06 16:53:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-01-06 16:53:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 16:53:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-01-06 16:53:35,777 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2021-01-06 16:53:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:35,777 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-01-06 16:53:35,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2021-01-06 16:53:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-01-06 16:53:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-01-06 16:53:35,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:35,779 INFO L422 BasicCegarLoop]: trace histogram [90, 49, 41, 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 16:53:35,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:53:35,992 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 52 times [2021-01-06 16:53:35,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:35,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121365552] [2021-01-06 16:53:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:43,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121365552] [2021-01-06 16:53:43,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843286020] [2021-01-06 16:53:43,502 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:43,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 101 conjunts are in the unsatisfiable core [2021-01-06 16:53:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:43,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:43,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-01-06 16:53:43,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328733929] [2021-01-06 16:53:43,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-01-06 16:53:43,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-01-06 16:53:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-01-06 16:53:43,956 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 103 states. [2021-01-06 16:53:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:44,778 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2021-01-06 16:53:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-01-06 16:53:44,779 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2021-01-06 16:53:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:44,780 INFO L225 Difference]: With dead ends: 209 [2021-01-06 16:53:44,781 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 16:53:44,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-01-06 16:53:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 16:53:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-01-06 16:53:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2021-01-06 16:53:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-01-06 16:53:44,788 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2021-01-06 16:53:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:44,789 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-01-06 16:53:44,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2021-01-06 16:53:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-01-06 16:53:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-01-06 16:53:44,790 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:44,790 INFO L422 BasicCegarLoop]: trace histogram [91, 50, 41, 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 16:53:45,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:53:45,006 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 53 times [2021-01-06 16:53:45,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:45,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909325279] [2021-01-06 16:53:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 16:53:47,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909325279] [2021-01-06 16:53:47,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723502113] [2021-01-06 16:53:47,924 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:48,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2021-01-06 16:53:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:48,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 108 conjunts are in the unsatisfiable core [2021-01-06 16:53:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:48,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:53:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 16:53:48,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:53:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479711415] [2021-01-06 16:53:48,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:53:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:53:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:53:48,895 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 55 states. [2021-01-06 16:53:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:51,505 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2021-01-06 16:53:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:53:51,507 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2021-01-06 16:53:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:51,508 INFO L225 Difference]: With dead ends: 212 [2021-01-06 16:53:51,509 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 16:53:51,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:53:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 16:53:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-01-06 16:53:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-01-06 16:53:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2021-01-06 16:53:51,520 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2021-01-06 16:53:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:51,520 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2021-01-06 16:53:51,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:53:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2021-01-06 16:53:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-01-06 16:53:51,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:51,522 INFO L422 BasicCegarLoop]: trace histogram [92, 51, 41, 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 16:53:51,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-01-06 16:53:51,736 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 54 times [2021-01-06 16:53:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:51,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168580139] [2021-01-06 16:53:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 16:53:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168580139] [2021-01-06 16:53:53,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:53:53,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-01-06 16:53:53,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31690208] [2021-01-06 16:53:53,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:53:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:53,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:53:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:53:53,973 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 52 states. [2021-01-06 16:53:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:54,410 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-01-06 16:53:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:53:54,412 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2021-01-06 16:53:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:54,412 INFO L225 Difference]: With dead ends: 208 [2021-01-06 16:53:54,412 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:53:54,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:53:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:53:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:53:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:53:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:53:54,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2021-01-06 16:53:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:54,415 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:53:54,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:53:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:53:54,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:53:54,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-01-06 16:53:54,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:53:54,675 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 353 [2021-01-06 16:53:56,773 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 353 DAG size of output: 307 [2021-01-06 16:53:56,873 INFO L185 CegarLoopUtils]: At program point L159(lines 43 160) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 5)) [2021-01-06 16:53:56,874 INFO L189 CegarLoopUtils]: For program point L19(lines 19 208) no Hoare annotation was computed. [2021-01-06 16:53:56,874 INFO L185 CegarLoopUtils]: At program point L135(lines 55 136) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 7) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,874 INFO L189 CegarLoopUtils]: For program point L94(lines 94 103) no Hoare annotation was computed. [2021-01-06 16:53:56,874 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:53:56,874 INFO L189 CegarLoopUtils]: For program point L61(lines 61 124) no Hoare annotation was computed. [2021-01-06 16:53:56,874 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:53:56,876 INFO L185 CegarLoopUtils]: At program point L111(lines 67 112) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~main__x~0 68) (<= ULTIMATE.start_main_~main__y~0 67) (<= 67 ULTIMATE.start_main_~main__y~0) (<= 67 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 78) (<= 78 ULTIMATE.start_main_~main__y~0) (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78)) (and (<= 84 ULTIMATE.start_main_~main__x~0) (<= 84 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 84) (<= ULTIMATE.start_main_~main__x~0 84)) (and (<= 90 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 90) (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 90)) (and (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 76) (<= 75 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 81) (<= 81 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 82) (<= 81 ULTIMATE.start_main_~main__y~0)) (and (< 99 ULTIMATE.start_main_~main__y~0) (<= 100 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 100)) (and (<= ULTIMATE.start_main_~main__y~0 88) (<= ULTIMATE.start_main_~main__x~0 88) (<= 88 ULTIMATE.start_main_~main__y~0) (<= 88 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 91) (<= 91 ULTIMATE.start_main_~main__x~0) (<= 91 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 91)) (and (< ULTIMATE.start_main_~main__x~0 54) (<= 53 ULTIMATE.start_main_~main__y~0) (<= 53 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 53)) (and (<= 66 ULTIMATE.start_main_~main__x~0) (<= 66 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 66) (< ULTIMATE.start_main_~main__x~0 67)) (and (<= 58 ULTIMATE.start_main_~main__y~0) (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 58) (< ULTIMATE.start_main_~main__x~0 59)) (and (<= 57 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 57) (<= 57 ULTIMATE.start_main_~main__y~0) (< ULTIMATE.start_main_~main__x~0 58)) (and (<= ULTIMATE.start_main_~main__y~0 68) (<= 68 ULTIMATE.start_main_~main__y~0) (<= 68 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 68)) (and (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 69) (<= 69 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 69)) (and (<= 87 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 87) (<= 87 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 87)) (and (<= ULTIMATE.start_main_~main__y~0 72) (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 72)) (and (<= 77 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 78) (<= ULTIMATE.start_main_~main__y~0 77) (<= 77 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 79) (<= 79 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= 79 ULTIMATE.start_main_~main__y~0)) (and (< ULTIMATE.start_main_~main__x~0 81) (<= ULTIMATE.start_main_~main__y~0 80) (<= 80 ULTIMATE.start_main_~main__x~0) (<= 80 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 71) (<= 71 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 72) (<= 71 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 50) (< ULTIMATE.start_main_~main__x~0 51) (<= 50 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 93) (<= ULTIMATE.start_main_~main__x~0 93) (<= 93 ULTIMATE.start_main_~main__x~0) (<= 93 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 99) (<= ULTIMATE.start_main_~main__x~0 99) (<= 99 ULTIMATE.start_main_~main__y~0) (<= 99 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 82) (<= 82 ULTIMATE.start_main_~main__y~0) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 82)) (and (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 96) (<= 96 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 96)) (and (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= 70 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 70)) (and (<= 51 ULTIMATE.start_main_~main__y~0) (<= 51 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 51) (<= ULTIMATE.start_main_~main__x~0 51)) (and (<= ULTIMATE.start_main_~main__x~0 92) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= 92 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 83) (< ULTIMATE.start_main_~main__x~0 84) (<= 83 ULTIMATE.start_main_~main__y~0) (<= 83 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 59) (<= 59 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0)) (and (<= 63 ULTIMATE.start_main_~main__x~0) (<= 63 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 63) (<= ULTIMATE.start_main_~main__y~0 63)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64) (<= ULTIMATE.start_main_~main__x~0 64)) (and (<= 74 ULTIMATE.start_main_~main__y~0) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 74) (<= ULTIMATE.start_main_~main__x~0 74)) (and (<= 54 ULTIMATE.start_main_~main__y~0) (<= 54 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 54) (< ULTIMATE.start_main_~main__x~0 55)) (and (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 56) (<= 56 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 62) (<= 62 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 62) (<= 62 ULTIMATE.start_main_~main__y~0)) (and (<= 98 ULTIMATE.start_main_~main__y~0) (<= 98 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 98) (<= ULTIMATE.start_main_~main__y~0 98)) (and (<= ULTIMATE.start_main_~main__y~0 55) (<= 55 ULTIMATE.start_main_~main__y~0) (<= 55 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 60) (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 60) (<= 60 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 89) (<= ULTIMATE.start_main_~main__y~0 89) (<= 89 ULTIMATE.start_main_~main__y~0) (<= 89 ULTIMATE.start_main_~main__x~0)) (and (<= 65 ULTIMATE.start_main_~main__y~0) (<= 65 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 65) (< ULTIMATE.start_main_~main__x~0 66)) (and (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 52) (<= ULTIMATE.start_main_~main__x~0 52) (<= 52 ULTIMATE.start_main_~main__y~0)) (and (<= 85 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 85) (<= 85 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 85)) (and (<= 73 ULTIMATE.start_main_~main__x~0) (<= 73 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= ULTIMATE.start_main_~main__y~0 73)) (and (<= 94 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 94)) (and (<= ULTIMATE.start_main_~main__y~0 76) (<= ULTIMATE.start_main_~main__x~0 76) (<= 76 ULTIMATE.start_main_~main__y~0) (<= 76 ULTIMATE.start_main_~main__x~0)) (and (<= 61 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 61) (<= ULTIMATE.start_main_~main__y~0 61) (<= 61 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (<= 97 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 97) (<= 97 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 97))) [2021-01-06 16:53:56,876 INFO L189 CegarLoopUtils]: For program point L37(lines 37 172) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L185 CegarLoopUtils]: At program point L195(lines 25 196) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point L96(line 96) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point L55(lines 55 136) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L192 CegarLoopUtils]: At program point L212(lines 13 214) the Hoare annotation is: true [2021-01-06 16:53:56,877 INFO L185 CegarLoopUtils]: At program point L171(lines 37 172) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 4) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point L31(lines 31 184) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L185 CegarLoopUtils]: At program point L147(lines 49 148) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 6) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L185 CegarLoopUtils]: At program point L123(lines 61 124) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 8) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 96) no Hoare annotation was computed. [2021-01-06 16:53:56,877 INFO L189 CegarLoopUtils]: For program point L49(lines 49 148) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point L74(lines 74 85) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point L25(lines 25 196) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point L17(lines 17 213) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L185 CegarLoopUtils]: At program point L207(lines 19 208) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point L67(lines 67 112) no Hoare annotation was computed. [2021-01-06 16:53:56,878 INFO L185 CegarLoopUtils]: At program point L183(lines 31 184) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__y~0 50) (<= ULTIMATE.start_main_~main__x~0 3) (<= 50 ULTIMATE.start_main_~main__y~0)) [2021-01-06 16:53:56,878 INFO L189 CegarLoopUtils]: For program point L43(lines 43 160) no Hoare annotation was computed. [2021-01-06 16:53:56,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:53:56 BoogieIcfgContainer [2021-01-06 16:53:56,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:53:56,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:53:56,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:53:56,916 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:53:56,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:57" (3/4) ... [2021-01-06 16:53:56,922 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:53:56,936 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:53:56,936 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:53:56,937 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:53:56,937 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:53:56,991 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/gj2007.c.i.p+lhb-reducer.c-witness.graphml [2021-01-06 16:53:56,991 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:53:56,993 INFO L168 Benchmark]: Toolchain (without parser) took 180198.78 ms. Allocated memory was 156.2 MB in the beginning and 342.9 MB in the end (delta: 186.6 MB). Free memory was 132.5 MB in the beginning and 238.4 MB in the end (delta: -105.9 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,993 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:53:56,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 156.2 MB. Free memory was 132.3 MB in the beginning and 121.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,994 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,994 INFO L168 Benchmark]: Boogie Preprocessor took 27.90 ms. Allocated memory is still 156.2 MB. Free memory was 119.7 MB in the beginning and 118.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,995 INFO L168 Benchmark]: RCFGBuilder took 487.80 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 135.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,995 INFO L168 Benchmark]: TraceAbstraction took 179259.30 ms. Allocated memory was 156.2 MB in the beginning and 342.9 MB in the end (delta: 186.6 MB). Free memory was 135.4 MB in the beginning and 242.1 MB in the end (delta: -106.7 MB). Peak memory consumption was 204.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,995 INFO L168 Benchmark]: Witness Printer took 75.35 ms. Allocated memory is still 342.9 MB. Free memory was 242.1 MB in the beginning and 238.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:53:56,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.31 ms. Allocated memory is still 156.2 MB. Free memory was 132.3 MB in the beginning and 121.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.90 ms. Allocated memory is still 156.2 MB. Free memory was 119.7 MB in the beginning and 118.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 487.80 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 135.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 179259.30 ms. Allocated memory was 156.2 MB in the beginning and 342.9 MB in the end (delta: 186.6 MB). Free memory was 135.4 MB in the beginning and 242.1 MB in the end (delta: -106.7 MB). Peak memory consumption was 204.2 MB. Max. memory is 8.0 GB. * Witness Printer took 75.35 ms. Allocated memory is still 342.9 MB. Free memory was 242.1 MB in the beginning and 238.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 96]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 1) && 50 <= main__y - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 5 - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((main__x < 68 && main__y <= 67) && 67 <= main__y) && 67 <= main__x) || (((main__y <= 78 && 78 <= main__y) && 78 <= main__x) && main__x <= 78)) || (((84 <= main__x && 84 <= main__y) && main__y <= 84) && main__x <= 84)) || (((90 <= main__x && main__y <= 90) && 90 <= main__y) && main__x <= 90)) || (((main__y <= 75 && 75 <= main__x) && main__x < 76) && 75 <= main__y)) || (((main__y <= 81 && 81 <= main__x) && main__x < 82) && 81 <= main__y)) || ((99 < main__y && 100 <= main__x) && main__y <= 100)) || (((main__y <= 88 && main__x <= 88) && 88 <= main__y) && 88 <= main__x)) || (((main__y <= 91 && 91 <= main__x) && 91 <= main__y) && main__x <= 91)) || (((main__x < 54 && 53 <= main__y) && 53 <= main__x) && main__y <= 53)) || (((66 <= main__x && 66 <= main__y) && main__y <= 66) && main__x < 67)) || (((58 <= main__y && 58 <= main__x) && main__y <= 58) && main__x < 59)) || (((57 <= main__x && main__y <= 57) && 57 <= main__y) && main__x < 58)) || (((main__y <= 68 && 68 <= main__y) && 68 <= main__x) && main__x <= 68)) || (((69 <= main__y && main__x <= 69) && 69 <= main__x) && main__y <= 69)) || (((87 <= main__x && main__x <= 87) && 87 <= main__y) && main__y <= 87)) || (((main__y <= 72 && 72 <= main__y) && 72 <= main__x) && main__x <= 72)) || (((77 <= main__x && main__x < 78) && main__y <= 77) && 77 <= main__y)) || (((main__y <= 79 && 79 <= main__x) && main__x <= 79) && 79 <= main__y)) || (((main__x < 81 && main__y <= 80) && 80 <= main__x) && 80 <= main__y)) || (((main__y <= 71 && 71 <= main__x) && main__x < 72) && 71 <= main__y)) || ((main__y <= 50 && main__x < 51) && 50 <= main__y)) || (((main__y <= 93 && main__x <= 93) && 93 <= main__x) && 93 <= main__y)) || (((main__y <= 99 && main__x <= 99) && 99 <= main__y) && 99 <= main__x)) || (((main__x <= 82 && 82 <= main__y) && 82 <= main__x) && main__y <= 82)) || (((96 <= main__y && main__y <= 96) && 96 <= main__x) && main__x <= 96)) || (((95 <= main__x && main__y <= 95) && main__x <= 95) && 95 <= main__y)) || (((70 <= main__y && main__y <= 70) && 70 <= main__x) && main__x <= 70)) || (((51 <= main__y && 51 <= main__x) && main__y <= 51) && main__x <= 51)) || (((main__x <= 92 && main__y <= 92) && 92 <= main__x) && 92 <= main__y)) || (((main__y <= 83 && main__x < 84) && 83 <= main__y) && 83 <= main__x)) || (((main__y <= 59 && 59 <= main__y) && main__x <= 59) && 59 <= main__x)) || (((63 <= main__x && 63 <= main__y) && main__x <= 63) && main__y <= 63)) || (((64 <= main__x && 64 <= main__y) && main__y <= 64) && main__x <= 64)) || (((74 <= main__y && 74 <= main__x) && main__y <= 74) && main__x <= 74)) || (((54 <= main__y && 54 <= main__x) && main__y <= 54) && main__x < 55)) || (((56 <= main__x && main__x <= 56) && 56 <= main__y) && main__y <= 56)) || (((main__y <= 62 && 62 <= main__x) && main__x <= 62) && 62 <= main__y)) || (((98 <= main__y && 98 <= main__x) && main__x <= 98) && main__y <= 98)) || (((main__y <= 55 && 55 <= main__y) && 55 <= main__x) && main__x < 56)) || (((main__y <= 60 && 60 <= main__x) && main__x <= 60) && 60 <= main__y)) || (((main__x <= 89 && main__y <= 89) && 89 <= main__y) && 89 <= main__x)) || (((65 <= main__y && 65 <= main__x) && main__y <= 65) && main__x < 66)) || (((52 <= main__x && main__y <= 52) && main__x <= 52) && 52 <= main__y)) || (((85 <= main__x && main__x <= 85) && 85 <= main__y) && main__y <= 85)) || (((73 <= main__x && 73 <= main__y) && main__x <= 73) && main__y <= 73)) || (((94 <= main__y && main__x <= 94) && 94 <= main__x) && main__y <= 94)) || (((main__y <= 76 && main__x <= 76) && 76 <= main__y) && 76 <= main__x)) || (((61 <= main__x && main__x <= 61) && main__y <= 61) && 61 <= main__y)) || (((main__x <= 86 && 86 <= main__x) && main__y <= 86) && 86 <= main__y)) || (((97 <= main__x && main__x <= 97) && 97 <= main__y) && main__y <= 97) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 4) && 50 <= main__y - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 8) && 50 <= main__y - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 3) && 50 <= main__y - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 7) && 50 <= main__y - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 2) && 50 <= main__y - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 6) && 50 <= main__y - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 176.6s, OverallIterations: 62, TraceHistogramMax: 92, AutomataDifference: 21.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 532 SDtfs, 2454 SDslu, 8633 SDs, 0 SdLazy, 17147 SolverSat, 2180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8954 GetRequests, 6141 SyntacticMatches, 6 SemanticMatches, 2807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 122.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 62 MinimizatonAttempts, 28 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 592 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 10 FomulaSimplificationsInter, 325 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 134.3s InterpolantComputationTime, 13187 NumberOfCodeBlocks, 13127 NumberOfCodeBlocksAsserted, 1399 NumberOfCheckSat, 13072 ConstructedInterpolants, 0 QuantifiedInterpolants, 5031452 SizeOfPredicates, 2 NumberOfNonLiveVariables, 17099 ConjunctsInSsa, 2134 ConjunctsInUnsatCore, 115 InterpolantComputations, 9 PerfectInterpolantSequences, 138585/345523 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...