/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/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:07:37,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:07:37,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:07:37,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:07:37,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:07:37,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:07:37,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:07:37,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:07:37,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:07:37,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:07:37,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:07:37,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:07:37,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:07:37,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:07:37,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:07:37,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:07:37,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:07:37,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:07:37,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:07:37,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:07:37,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:07:37,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:07:37,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:07:37,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:07:37,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:07:37,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:07:37,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:07:37,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:07:37,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:07:37,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:07:37,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:07:37,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:07:37,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:07:37,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:07:37,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:07:37,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:07:37,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:07:37,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:07:37,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:07:37,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:07:37,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:07:37,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:07:37,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:07:37,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:07:37,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:07:37,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:07:37,426 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:07:37,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:07:37,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:07:37,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:07:37,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:07:37,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:07:37,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:07:37,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:07:37,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:07:37,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:07:37,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:07:37,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:07:37,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:07:37,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:37,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:07:37,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:07:37,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:07:37,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:07:37,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:07:37,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:07:37,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:07:37,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:07:37,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:07:37,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:07:37,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:07:37,869 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:07:37,870 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:07:37,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-12-23 06:07:37,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/113612aaf/1a49a5941b904e66a15bece2c9925071/FLAG02667ed16 [2020-12-23 06:07:38,720 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:07:38,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-12-23 06:07:38,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/113612aaf/1a49a5941b904e66a15bece2c9925071/FLAG02667ed16 [2020-12-23 06:07:39,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/113612aaf/1a49a5941b904e66a15bece2c9925071 [2020-12-23 06:07:39,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:07:39,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:07:39,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:39,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:07:39,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:07:39,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abf0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39, skipping insertion in model container [2020-12-23 06:07:39,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:07:39,112 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_99~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_103~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_3~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_107~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__u~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_4~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_111~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__v~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_5~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~2,] left hand side expression in assignment: lhs: VariableLHS[~__return_136~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_6~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~2,] left hand side expression in assignment: lhs: VariableLHS[~__return_142~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_7~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~3,] left hand side expression in assignment: lhs: VariableLHS[~__return_146~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__u~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_8~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~3,] left hand side expression in assignment: lhs: VariableLHS[~__return_151~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__v~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__t~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_2~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_9~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:07:39,323 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/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_2~0,] [2020-12-23 06:07:39,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:39,342 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~__tmp_1~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_99~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_2~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~0,] left hand side expression in assignment: lhs: VariableLHS[~__return_103~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_3~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_107~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__u~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_4~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~1,] left hand side expression in assignment: lhs: VariableLHS[~__return_111~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__v~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main__x~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_5~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~2,] left hand side expression in assignment: lhs: VariableLHS[~__return_136~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__y~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_6~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~2,] left hand side expression in assignment: lhs: VariableLHS[~__return_142~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__z~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_7~0,] left hand side expression in assignment: lhs: VariableLHS[~f__x~3,] left hand side expression in assignment: lhs: VariableLHS[~__return_146~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main__u~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_8~0,] left hand side expression in assignment: lhs: VariableLHS[~g__x~3,] left hand side expression in assignment: lhs: VariableLHS[~__return_151~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_1~0,] left hand side expression in assignment: lhs: VariableLHS[~main__v~0,] left hand side expression in assignment: lhs: VariableLHS[~main__i~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_0~0,] left hand side expression in assignment: lhs: VariableLHS[~main__t~0,] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_2~0,] left hand side expression in assignment: lhs: VariableLHS[~__tmp_9~0,] left hand side expression in assignment: lhs: VariableLHS[~__VERIFIER_assert__cond~0,] [2020-12-23 06:07:39,374 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/float-benchs/zonotope_3.c.p+cfa-reducer.c[2717,2730] left hand side expression in assignment: lhs: VariableLHS[~main____CPAchecker_TMP_2~0,] [2020-12-23 06:07:39,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:39,395 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:07:39,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39 WrapperNode [2020-12-23 06:07:39,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:39,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:39,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:07:39,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:07:39,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:39,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:07:39,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:07:39,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:07:39,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... [2020-12-23 06:07:39,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:07:39,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:07:39,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:07:39,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:07:39,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:07:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:07:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:07:39,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:07:40,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:07:40,011 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 06:07:40,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:40 BoogieIcfgContainer [2020-12-23 06:07:40,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:07:40,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:07:40,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:07:40,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:07:40,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:07:39" (1/3) ... [2020-12-23 06:07:40,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf93934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:40, skipping insertion in model container [2020-12-23 06:07:40,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:39" (2/3) ... [2020-12-23 06:07:40,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf93934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:40, skipping insertion in model container [2020-12-23 06:07:40,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:40" (3/3) ... [2020-12-23 06:07:40,067 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2020-12-23 06:07:40,088 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:07:40,099 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:07:40,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:07:40,180 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:07:40,180 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:07:40,181 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:07:40,181 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:07:40,181 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:07:40,181 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:07:40,181 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:07:40,181 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:07:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 06:07:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:07:40,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:40,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:40,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash 739680105, now seen corresponding path program 1 times [2020-12-23 06:07:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:40,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455506414] [2020-12-23 06:07:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455506414] [2020-12-23 06:07:40,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:40,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:07:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592466229] [2020-12-23 06:07:40,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:07:40,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:40,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:07:40,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:40,453 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-12-23 06:07:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:40,491 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-23 06:07:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:07:40,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 06:07:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:40,503 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:07:40,503 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:07:40,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:07:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-12-23 06:07:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:07:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-23 06:07:40,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2020-12-23 06:07:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:40,543 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-23 06:07:40,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:07:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-23 06:07:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:07:40,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:40,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:40,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:07:40,544 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 573752309, now seen corresponding path program 1 times [2020-12-23 06:07:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:40,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634695452] [2020-12-23 06:07:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634695452] [2020-12-23 06:07:40,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:40,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:07:40,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049598644] [2020-12-23 06:07:40,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:07:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:07:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:40,606 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2020-12-23 06:07:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:40,622 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-23 06:07:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:07:40,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 06:07:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:40,624 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:07:40,624 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:07:40,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:07:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:07:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:07:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 06:07:40,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-23 06:07:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:40,631 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 06:07:40,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:07:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 06:07:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:07:40,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:40,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:40,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:07:40,634 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1667531312, now seen corresponding path program 1 times [2020-12-23 06:07:40,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:40,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446035788] [2020-12-23 06:07:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446035788] [2020-12-23 06:07:40,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001488890] [2020-12-23 06:07:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:07:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:40,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:07:40,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789181583] [2020-12-23 06:07:40,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:07:40,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:40,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:07:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:40,924 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-23 06:07:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:40,944 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-23 06:07:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:07:40,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 06:07:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:40,946 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:07:40,946 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:07:40,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:07:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-12-23 06:07:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:07:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 06:07:40,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-12-23 06:07:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:40,952 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 06:07:40,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:07:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 06:07:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:07:40,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:40,953 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:41,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:07:41,163 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:41,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1478121097, now seen corresponding path program 2 times [2020-12-23 06:07:41,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:41,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327229261] [2020-12-23 06:07:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:07:41,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327229261] [2020-12-23 06:07:41,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148523024] [2020-12-23 06:07:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:41,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 06:07:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:07:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:07:41,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:07:41,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-12-23 06:07:41,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164641225] [2020-12-23 06:07:41,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:07:41,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:41,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:07:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:41,345 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-12-23 06:07:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:41,366 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 06:07:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:07:41,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-23 06:07:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:41,368 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:07:41,368 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:07:41,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:07:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:07:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:07:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 06:07:41,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 06:07:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:41,374 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 06:07:41,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:07:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 06:07:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:07:41,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:41,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:41,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:41,589 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:41,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1461110436, now seen corresponding path program 1 times [2020-12-23 06:07:41,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:41,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403408919] [2020-12-23 06:07:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403408919] [2020-12-23 06:07:41,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137951954] [2020-12-23 06:07:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:07:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:41,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:41,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:07:41,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109694230] [2020-12-23 06:07:41,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:07:41,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:07:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:41,780 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-23 06:07:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:41,800 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-23 06:07:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:07:41,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-23 06:07:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:41,802 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:07:41,802 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:07:41,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:07:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-23 06:07:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:07:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 06:07:41,808 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-12-23 06:07:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:41,808 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 06:07:41,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:07:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 06:07:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:07:41,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:41,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:42,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash -295213789, now seen corresponding path program 2 times [2020-12-23 06:07:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:42,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587659061] [2020-12-23 06:07:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587659061] [2020-12-23 06:07:42,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673587181] [2020-12-23 06:07:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:42,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:07:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:42,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:07:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926967087] [2020-12-23 06:07:42,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:07:42,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:07:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:42,313 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-12-23 06:07:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:42,362 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-23 06:07:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:07:42,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 06:07:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:42,366 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:07:42,366 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:07:42,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:07:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-12-23 06:07:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:07:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 06:07:42,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-12-23 06:07:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:42,380 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 06:07:42,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:07:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 06:07:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:07:42,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,585 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1379117718, now seen corresponding path program 3 times [2020-12-23 06:07:42,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:42,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071089689] [2020-12-23 06:07:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071089689] [2020-12-23 06:07:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772223484] [2020-12-23 06:07:42,656 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:07:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:07:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:42,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:07:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030432578] [2020-12-23 06:07:42,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:07:42,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:07:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:42,815 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-12-23 06:07:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:42,858 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 06:07:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:07:42,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 06:07:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:42,860 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:07:42,860 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:07:42,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:07:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-23 06:07:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:07:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 06:07:42,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-12-23 06:07:42,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:42,871 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 06:07:42,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:07:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 06:07:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:07:42,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,873 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:43,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:07:43,081 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1428277809, now seen corresponding path program 4 times [2020-12-23 06:07:43,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:43,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343101712] [2020-12-23 06:07:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343101712] [2020-12-23 06:07:43,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710068239] [2020-12-23 06:07:43,189 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:43,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:43,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:07:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:43,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:07:43,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594843190] [2020-12-23 06:07:43,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:07:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:07:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:43,365 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-12-23 06:07:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:43,403 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-23 06:07:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:07:43,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 06:07:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:43,404 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:07:43,405 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 06:07:43,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 06:07:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-23 06:07:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:07:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 06:07:43,410 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-12-23 06:07:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:43,410 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 06:07:43,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:07:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 06:07:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:07:43,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:43,412 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:43,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:43,626 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1215200392, now seen corresponding path program 5 times [2020-12-23 06:07:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891594268] [2020-12-23 06:07:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891594268] [2020-12-23 06:07:43,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355829912] [2020-12-23 06:07:43,783 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:43,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 06:07:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:07:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:43,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:07:43,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636210108] [2020-12-23 06:07:43,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:07:43,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:07:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:43,952 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-12-23 06:07:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:43,986 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-23 06:07:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:07:43,987 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-23 06:07:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:43,987 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:07:43,988 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:07:43,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:07:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-23 06:07:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:07:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 06:07:43,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-12-23 06:07:43,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:43,993 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 06:07:43,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:07:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 06:07:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:07:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:43,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:44,198 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2103787839, now seen corresponding path program 6 times [2020-12-23 06:07:44,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961387787] [2020-12-23 06:07:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961387787] [2020-12-23 06:07:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347243121] [2020-12-23 06:07:44,324 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:44,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 06:07:44,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:07:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:44,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:07:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113871289] [2020-12-23 06:07:44,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:07:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:07:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:44,517 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-12-23 06:07:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:44,566 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-23 06:07:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:07:44,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 06:07:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:44,568 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:07:44,568 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 06:07:44,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 06:07:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-23 06:07:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:07:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 06:07:44,574 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-12-23 06:07:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:44,574 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 06:07:44,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:07:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 06:07:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:07:44,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:44,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:07:44,792 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1811496058, now seen corresponding path program 7 times [2020-12-23 06:07:44,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951236839] [2020-12-23 06:07:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951236839] [2020-12-23 06:07:44,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32280934] [2020-12-23 06:07:44,958 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:45,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:07:45,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017747298] [2020-12-23 06:07:45,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:07:45,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:07:45,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:45,220 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-12-23 06:07:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:45,270 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-23 06:07:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:07:45,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-23 06:07:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:45,273 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:07:45,274 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 06:07:45,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 06:07:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-23 06:07:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:07:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-23 06:07:45,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-12-23 06:07:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:45,285 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-23 06:07:45,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:07:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-23 06:07:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:07:45,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:45,288 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:45,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,503 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:45,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1644180915, now seen corresponding path program 8 times [2020-12-23 06:07:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:45,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224240634] [2020-12-23 06:07:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224240634] [2020-12-23 06:07:45,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802132674] [2020-12-23 06:07:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:45,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:07:45,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728962639] [2020-12-23 06:07:45,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:07:45,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:45,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:07:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:45,978 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-12-23 06:07:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:46,033 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-23 06:07:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:07:46,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-12-23 06:07:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:46,037 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:07:46,037 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 06:07:46,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 06:07:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-12-23 06:07:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:07:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 06:07:46,051 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-12-23 06:07:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:46,052 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 06:07:46,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:07:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 06:07:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:07:46,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:46,053 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,260 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1660556692, now seen corresponding path program 9 times [2020-12-23 06:07:46,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603092192] [2020-12-23 06:07:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603092192] [2020-12-23 06:07:46,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278606615] [2020-12-23 06:07:46,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 06:07:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:07:46,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:46,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:07:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654831103] [2020-12-23 06:07:46,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:07:46,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:07:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:46,658 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-12-23 06:07:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:46,711 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-23 06:07:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:07:46,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-23 06:07:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:46,712 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:07:46,713 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 06:07:46,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 06:07:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-12-23 06:07:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:07:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 06:07:46,719 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-12-23 06:07:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:46,719 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 06:07:46,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:07:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 06:07:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:07:46,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:46,721 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:07:46,934 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1069507931, now seen corresponding path program 10 times [2020-12-23 06:07:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851537128] [2020-12-23 06:07:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851537128] [2020-12-23 06:07:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632335441] [2020-12-23 06:07:47,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:47,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:07:47,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800022829] [2020-12-23 06:07:47,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:07:47,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:07:47,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:47,317 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 15 states. [2020-12-23 06:07:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:47,390 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-23 06:07:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:07:47,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-12-23 06:07:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:47,392 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:07:47,392 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 06:07:47,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 06:07:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-23 06:07:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 06:07:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 06:07:47,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-12-23 06:07:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:47,399 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 06:07:47,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:07:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 06:07:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:07:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:47,400 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:47,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:07:47,614 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1774618206, now seen corresponding path program 11 times [2020-12-23 06:07:47,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:47,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56735277] [2020-12-23 06:07:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56735277] [2020-12-23 06:07:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083822576] [2020-12-23 06:07:47,808 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-23 06:07:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:47,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:48,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:07:48,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037694864] [2020-12-23 06:07:48,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:07:48,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:48,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:07:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:48,037 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 16 states. [2020-12-23 06:07:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:48,087 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-23 06:07:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:07:48,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-12-23 06:07:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:48,088 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:07:48,088 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 06:07:48,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 06:07:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-12-23 06:07:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:07:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-23 06:07:48,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-12-23 06:07:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:48,094 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-23 06:07:48,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:07:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-23 06:07:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:07:48,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:48,096 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:48,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:07:48,309 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1030885993, now seen corresponding path program 12 times [2020-12-23 06:07:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:48,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687095847] [2020-12-23 06:07:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687095847] [2020-12-23 06:07:48,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712887374] [2020-12-23 06:07:48,566 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:48,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 06:07:48,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:07:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:48,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:07:48,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245047484] [2020-12-23 06:07:48,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:07:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:07:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:48,880 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 17 states. [2020-12-23 06:07:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:48,942 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-23 06:07:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:07:48,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-23 06:07:48,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:48,943 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:07:48,944 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 06:07:48,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 06:07:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-23 06:07:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 06:07:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 06:07:48,953 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-12-23 06:07:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:48,954 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 06:07:48,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:07:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 06:07:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:07:48,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:48,956 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:49,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,171 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -242028624, now seen corresponding path program 13 times [2020-12-23 06:07:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160898162] [2020-12-23 06:07:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160898162] [2020-12-23 06:07:49,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392586002] [2020-12-23 06:07:49,367 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:07:49,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:49,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:07:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043798688] [2020-12-23 06:07:49,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:07:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:07:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:49,596 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 18 states. [2020-12-23 06:07:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:49,663 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-12-23 06:07:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:07:49,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-12-23 06:07:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:49,665 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:07:49,665 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 06:07:49,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 06:07:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-12-23 06:07:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 06:07:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-23 06:07:49,670 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2020-12-23 06:07:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:49,670 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-23 06:07:49,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:07:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-23 06:07:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:07:49,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:49,672 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:49,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:07:49,884 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1008348809, now seen corresponding path program 14 times [2020-12-23 06:07:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202412314] [2020-12-23 06:07:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202412314] [2020-12-23 06:07:50,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162787750] [2020-12-23 06:07:50,129 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:50,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:07:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:50,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:07:50,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926484258] [2020-12-23 06:07:50,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:07:50,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:07:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:50,385 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 19 states. [2020-12-23 06:07:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:50,443 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-12-23 06:07:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:07:50,444 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-12-23 06:07:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:50,445 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:07:50,445 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 06:07:50,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 06:07:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 06:07:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 06:07:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-23 06:07:50,450 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2020-12-23 06:07:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:50,450 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-23 06:07:50,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:07:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-23 06:07:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:07:50,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:50,452 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:50,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:07:50,665 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1965787202, now seen corresponding path program 15 times [2020-12-23 06:07:50,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:50,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052279958] [2020-12-23 06:07:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052279958] [2020-12-23 06:07:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24800463] [2020-12-23 06:07:50,942 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:51,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-23 06:07:51,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:07:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:51,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:07:51,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319693090] [2020-12-23 06:07:51,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:07:51,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:51,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:07:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:51,267 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 20 states. [2020-12-23 06:07:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:51,333 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-23 06:07:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:07:51,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-12-23 06:07:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:51,335 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:07:51,335 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 06:07:51,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 06:07:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-23 06:07:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 06:07:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 06:07:51,349 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2020-12-23 06:07:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:51,349 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 06:07:51,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:07:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 06:07:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:07:51,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:51,355 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:51,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:51,568 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1374200453, now seen corresponding path program 16 times [2020-12-23 06:07:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:51,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968804101] [2020-12-23 06:07:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968804101] [2020-12-23 06:07:51,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470976044] [2020-12-23 06:07:51,826 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:07:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:52,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:07:52,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772511384] [2020-12-23 06:07:52,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:07:52,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:07:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:52,159 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 21 states. [2020-12-23 06:07:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:52,227 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-23 06:07:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:07:52,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-12-23 06:07:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:52,229 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:07:52,229 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 06:07:52,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 06:07:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-23 06:07:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 06:07:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-23 06:07:52,233 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-12-23 06:07:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:52,234 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-23 06:07:52,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:07:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-23 06:07:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:07:52,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:52,235 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:52,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,450 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash -909372980, now seen corresponding path program 17 times [2020-12-23 06:07:52,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:52,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631899290] [2020-12-23 06:07:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631899290] [2020-12-23 06:07:52,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960217552] [2020-12-23 06:07:52,726 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 06:07:52,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:07:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:53,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:07:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824752365] [2020-12-23 06:07:53,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:07:53,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:53,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:07:53,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:53,096 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 22 states. [2020-12-23 06:07:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:53,174 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-12-23 06:07:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:07:53,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2020-12-23 06:07:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:53,175 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:07:53,175 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 06:07:53,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 06:07:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-23 06:07:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 06:07:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-12-23 06:07:53,180 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-12-23 06:07:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:53,181 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-12-23 06:07:53,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:07:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-12-23 06:07:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:07:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:53,182 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:53,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:53,394 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1203206765, now seen corresponding path program 18 times [2020-12-23 06:07:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:53,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966181720] [2020-12-23 06:07:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966181720] [2020-12-23 06:07:53,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18004789] [2020-12-23 06:07:53,737 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:53,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-23 06:07:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:07:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:54,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:07:54,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484311973] [2020-12-23 06:07:54,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:07:54,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:07:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:54,062 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 23 states. [2020-12-23 06:07:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:54,134 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-23 06:07:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:07:54,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-23 06:07:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:54,138 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:07:54,138 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 06:07:54,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 06:07:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-12-23 06:07:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 06:07:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-23 06:07:54,159 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2020-12-23 06:07:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:54,159 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-23 06:07:54,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:07:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-23 06:07:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:07:54,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:54,160 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:54,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:07:54,360 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1749532122, now seen corresponding path program 19 times [2020-12-23 06:07:54,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:54,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047101769] [2020-12-23 06:07:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047101769] [2020-12-23 06:07:54,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402038902] [2020-12-23 06:07:54,740 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:07:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:55,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:07:55,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337856287] [2020-12-23 06:07:55,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:07:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:07:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:55,040 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 24 states. [2020-12-23 06:07:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:55,117 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-23 06:07:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:07:55,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-12-23 06:07:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:55,118 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:07:55,118 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:07:55,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:07:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-12-23 06:07:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 06:07:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-23 06:07:55,122 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2020-12-23 06:07:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:55,122 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-23 06:07:55,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:07:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-23 06:07:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:07:55,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:55,125 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:55,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:07:55,339 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 433289889, now seen corresponding path program 20 times [2020-12-23 06:07:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:55,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489156778] [2020-12-23 06:07:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489156778] [2020-12-23 06:07:55,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341517586] [2020-12-23 06:07:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:55,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:55,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:07:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:56,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:07:56,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848247079] [2020-12-23 06:07:56,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:07:56,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:07:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:07:56,046 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 25 states. [2020-12-23 06:07:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:56,127 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-12-23 06:07:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:07:56,128 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2020-12-23 06:07:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:56,129 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:07:56,129 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 06:07:56,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:07:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 06:07:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-12-23 06:07:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 06:07:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-23 06:07:56,134 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 92 [2020-12-23 06:07:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:56,134 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-23 06:07:56,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:07:56,134 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-23 06:07:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:07:56,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:56,135 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:56,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:56,350 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:56,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1914010600, now seen corresponding path program 21 times [2020-12-23 06:07:56,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:56,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300796813] [2020-12-23 06:07:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300796813] [2020-12-23 06:07:56,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011838577] [2020-12-23 06:07:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:57,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2020-12-23 06:07:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:57,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:07:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:57,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:07:57,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015281320] [2020-12-23 06:07:57,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:07:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:07:57,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:07:57,183 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 26 states. [2020-12-23 06:07:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:57,262 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-12-23 06:07:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:07:57,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-12-23 06:07:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:57,263 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:07:57,263 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 06:07:57,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:07:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 06:07:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-12-23 06:07:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 06:07:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-12-23 06:07:57,268 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 96 [2020-12-23 06:07:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:57,268 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-12-23 06:07:57,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:07:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-12-23 06:07:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:07:57,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:57,270 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:57,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:07:57,484 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash -346586705, now seen corresponding path program 22 times [2020-12-23 06:07:57,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:57,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882868799] [2020-12-23 06:07:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882868799] [2020-12-23 06:07:57,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688300564] [2020-12-23 06:07:57,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:58,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:07:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:58,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:58,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:07:58,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747255695] [2020-12-23 06:07:58,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:07:58,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:58,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:07:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:07:58,255 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 27 states. [2020-12-23 06:07:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:58,375 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2020-12-23 06:07:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:07:58,376 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2020-12-23 06:07:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:58,377 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:07:58,377 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 06:07:58,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:07:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 06:07:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2020-12-23 06:07:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 06:07:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-12-23 06:07:58,382 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2020-12-23 06:07:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:58,383 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-12-23 06:07:58,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:07:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-12-23 06:07:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:07:58,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:58,384 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:58,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,593 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1157843958, now seen corresponding path program 23 times [2020-12-23 06:07:58,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:58,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009646506] [2020-12-23 06:07:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:59,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009646506] [2020-12-23 06:07:59,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216790069] [2020-12-23 06:07:59,084 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:59,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-23 06:07:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:07:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:59,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:59,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:07:59,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718338789] [2020-12-23 06:07:59,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:07:59,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:59,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:07:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:07:59,455 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 28 states. [2020-12-23 06:07:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:59,561 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-23 06:07:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:07:59,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 104 [2020-12-23 06:07:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:59,563 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:07:59,563 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 06:07:59,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:07:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 06:07:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-12-23 06:07:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 06:07:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-12-23 06:07:59,569 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2020-12-23 06:07:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:59,569 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-12-23 06:07:59,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:07:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-12-23 06:07:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:07:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:59,571 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:59,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:07:59,784 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash -207447363, now seen corresponding path program 24 times [2020-12-23 06:07:59,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:59,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759773029] [2020-12-23 06:07:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759773029] [2020-12-23 06:08:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349177305] [2020-12-23 06:08:00,293 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:00,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-23 06:08:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:00,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:08:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:00,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:08:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5743995] [2020-12-23 06:08:00,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:08:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:08:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:08:00,692 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 29 states. [2020-12-23 06:08:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:00,787 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-12-23 06:08:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:08:00,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2020-12-23 06:08:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:00,789 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:08:00,789 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 06:08:00,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:08:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 06:08:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-23 06:08:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 06:08:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-12-23 06:08:00,794 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 108 [2020-12-23 06:08:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:00,794 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-12-23 06:08:00,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:08:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-12-23 06:08:00,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:08:00,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:00,796 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:01,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:08:01,009 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:01,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1864421884, now seen corresponding path program 25 times [2020-12-23 06:08:01,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:01,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172028127] [2020-12-23 06:08:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172028127] [2020-12-23 06:08:01,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135641619] [2020-12-23 06:08:01,565 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:01,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:08:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:01,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:08:01,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12847269] [2020-12-23 06:08:01,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:08:01,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:08:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:08:01,945 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 30 states. [2020-12-23 06:08:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:02,040 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 06:08:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:08:02,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-12-23 06:08:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:02,042 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:08:02,042 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 06:08:02,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:08:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 06:08:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-12-23 06:08:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 06:08:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-12-23 06:08:02,047 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2020-12-23 06:08:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:02,048 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-12-23 06:08:02,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:08:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-12-23 06:08:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:08:02,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:02,049 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:02,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:08:02,263 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1266861515, now seen corresponding path program 26 times [2020-12-23 06:08:02,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:02,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563556092] [2020-12-23 06:08:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:02,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563556092] [2020-12-23 06:08:02,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746641106] [2020-12-23 06:08:02,877 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:03,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:08:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:03,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:03,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:08:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006561523] [2020-12-23 06:08:03,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:08:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:03,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:08:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:08:03,245 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 31 states. [2020-12-23 06:08:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:03,362 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-12-23 06:08:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:08:03,362 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2020-12-23 06:08:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:03,363 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:08:03,363 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 06:08:03,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:08:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 06:08:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-12-23 06:08:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 06:08:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-12-23 06:08:03,369 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 116 [2020-12-23 06:08:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-12-23 06:08:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:08:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-12-23 06:08:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 06:08:03,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:03,371 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:03,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:03,586 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1467425298, now seen corresponding path program 27 times [2020-12-23 06:08:03,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:03,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212567393] [2020-12-23 06:08:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212567393] [2020-12-23 06:08:04,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851132611] [2020-12-23 06:08:04,173 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2020-12-23 06:08:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:04,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:08:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:04,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:08:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881643250] [2020-12-23 06:08:04,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:08:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:08:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:08:04,666 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 32 states. [2020-12-23 06:08:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:04,772 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-12-23 06:08:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:08:04,772 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-12-23 06:08:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:04,773 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:08:04,773 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:08:04,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:08:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:08:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-12-23 06:08:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 06:08:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-12-23 06:08:04,779 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2020-12-23 06:08:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:04,779 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-12-23 06:08:04,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:08:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-12-23 06:08:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:08:04,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:04,781 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:04,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 06:08:04,995 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:04,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1573257945, now seen corresponding path program 28 times [2020-12-23 06:08:04,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:04,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319257349] [2020-12-23 06:08:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319257349] [2020-12-23 06:08:05,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145061901] [2020-12-23 06:08:05,598 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:05,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:05,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:05,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:08:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:06,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:06,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:08:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147212922] [2020-12-23 06:08:06,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:08:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:08:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:08:06,012 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 33 states. [2020-12-23 06:08:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:06,144 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2020-12-23 06:08:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:08:06,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2020-12-23 06:08:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:06,145 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:08:06,145 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 06:08:06,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:08:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 06:08:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2020-12-23 06:08:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 06:08:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-12-23 06:08:06,150 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 124 [2020-12-23 06:08:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:06,151 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-12-23 06:08:06,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:08:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-12-23 06:08:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:08:06,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:06,152 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:06,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:06,366 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash -325507040, now seen corresponding path program 29 times [2020-12-23 06:08:06,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:06,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382127925] [2020-12-23 06:08:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382127925] [2020-12-23 06:08:07,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697630714] [2020-12-23 06:08:07,072 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:07,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-23 06:08:07,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:08:07,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:07,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:08:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705632306] [2020-12-23 06:08:07,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:08:07,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:08:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:08:07,548 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 34 states. [2020-12-23 06:08:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:07,685 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-12-23 06:08:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:08:07,686 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-12-23 06:08:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:07,687 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:08:07,687 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 06:08:07,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:08:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 06:08:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-23 06:08:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 06:08:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-12-23 06:08:07,693 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 128 [2020-12-23 06:08:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:07,693 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-12-23 06:08:07,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:08:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-12-23 06:08:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:08:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:07,695 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:07,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:08:07,910 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash -415608345, now seen corresponding path program 30 times [2020-12-23 06:08:07,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:07,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760950788] [2020-12-23 06:08:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760950788] [2020-12-23 06:08:08,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879624000] [2020-12-23 06:08:08,638 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:08,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-23 06:08:08,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:08,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:08:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:09,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:09,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:08:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754716240] [2020-12-23 06:08:09,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:08:09,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:08:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:08:09,128 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 35 states. [2020-12-23 06:08:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:09,271 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2020-12-23 06:08:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:08:09,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 132 [2020-12-23 06:08:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:09,273 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:08:09,273 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:08:09,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:08:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:08:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-12-23 06:08:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 06:08:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-12-23 06:08:09,278 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 132 [2020-12-23 06:08:09,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:09,279 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-12-23 06:08:09,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:08:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-12-23 06:08:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:08:09,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:09,280 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:09,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:08:09,496 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash -166510546, now seen corresponding path program 31 times [2020-12-23 06:08:09,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:09,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657239323] [2020-12-23 06:08:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657239323] [2020-12-23 06:08:10,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938238830] [2020-12-23 06:08:10,303 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:08:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:10,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:08:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969939503] [2020-12-23 06:08:10,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:08:10,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:08:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:08:10,753 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 36 states. [2020-12-23 06:08:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:10,878 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-12-23 06:08:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:08:10,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2020-12-23 06:08:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:10,879 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:08:10,880 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 06:08:10,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:08:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 06:08:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-12-23 06:08:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 06:08:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2020-12-23 06:08:10,888 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 136 [2020-12-23 06:08:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:10,888 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2020-12-23 06:08:10,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:08:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2020-12-23 06:08:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:08:10,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:10,890 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:11,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:08:11,104 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -156388619, now seen corresponding path program 32 times [2020-12-23 06:08:11,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:11,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767673821] [2020-12-23 06:08:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767673821] [2020-12-23 06:08:11,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226194795] [2020-12-23 06:08:11,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:08:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:12,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:12,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:08:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602677850] [2020-12-23 06:08:12,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:08:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:08:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:08:12,385 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 37 states. [2020-12-23 06:08:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:12,527 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-12-23 06:08:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:08:12,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 140 [2020-12-23 06:08:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:12,529 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:08:12,529 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 06:08:12,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:08:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 06:08:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-12-23 06:08:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-23 06:08:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2020-12-23 06:08:12,535 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 140 [2020-12-23 06:08:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:12,535 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2020-12-23 06:08:12,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:08:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2020-12-23 06:08:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 06:08:12,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:12,537 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:12,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:08:12,751 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1806920252, now seen corresponding path program 33 times [2020-12-23 06:08:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:12,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870011254] [2020-12-23 06:08:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870011254] [2020-12-23 06:08:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606811251] [2020-12-23 06:08:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:13,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2020-12-23 06:08:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:08:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:14,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:14,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:08:14,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602061138] [2020-12-23 06:08:14,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:08:14,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:08:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:08:14,146 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 38 states. [2020-12-23 06:08:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:14,281 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-12-23 06:08:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:08:14,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2020-12-23 06:08:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:14,287 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:08:14,288 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 06:08:14,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:08:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 06:08:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-12-23 06:08:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 06:08:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-12-23 06:08:14,294 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2020-12-23 06:08:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:14,294 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-12-23 06:08:14,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:08:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-12-23 06:08:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:08:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:14,296 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:14,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:08:14,511 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash -319937021, now seen corresponding path program 34 times [2020-12-23 06:08:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:14,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845903208] [2020-12-23 06:08:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:15,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845903208] [2020-12-23 06:08:15,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103336089] [2020-12-23 06:08:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:15,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:08:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:15,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:15,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:08:15,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62401650] [2020-12-23 06:08:15,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:08:15,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:08:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:08:15,881 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 39 states. [2020-12-23 06:08:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:16,040 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-12-23 06:08:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:08:16,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2020-12-23 06:08:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:16,045 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:08:16,045 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 06:08:16,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:08:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 06:08:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-12-23 06:08:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 06:08:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-12-23 06:08:16,051 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 148 [2020-12-23 06:08:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:16,051 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-12-23 06:08:16,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:08:16,051 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-12-23 06:08:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:08:16,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:16,052 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:16,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:08:16,268 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1756912054, now seen corresponding path program 35 times [2020-12-23 06:08:16,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:16,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51202054] [2020-12-23 06:08:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51202054] [2020-12-23 06:08:17,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125856146] [2020-12-23 06:08:17,154 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:17,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 06:08:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:17,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:08:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:17,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:08:17,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286416118] [2020-12-23 06:08:17,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:08:17,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:08:17,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:08:17,719 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 40 states. [2020-12-23 06:08:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:17,863 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2020-12-23 06:08:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:08:17,863 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 152 [2020-12-23 06:08:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:17,864 INFO L225 Difference]: With dead ends: 168 [2020-12-23 06:08:17,865 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 06:08:17,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:08:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 06:08:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-12-23 06:08:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 06:08:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2020-12-23 06:08:17,870 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 152 [2020-12-23 06:08:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:17,870 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2020-12-23 06:08:17,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:08:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2020-12-23 06:08:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 06:08:17,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:17,872 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:18,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:08:18,087 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2093591313, now seen corresponding path program 36 times [2020-12-23 06:08:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:18,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41343787] [2020-12-23 06:08:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41343787] [2020-12-23 06:08:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30742176] [2020-12-23 06:08:19,069 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:19,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-23 06:08:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:19,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:08:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:19,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:19,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:08:19,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125371561] [2020-12-23 06:08:19,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:08:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:08:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:08:19,628 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 41 states. [2020-12-23 06:08:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:19,802 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-12-23 06:08:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:08:19,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 156 [2020-12-23 06:08:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:19,804 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:08:19,804 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 06:08:19,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:08:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 06:08:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-12-23 06:08:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 06:08:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-12-23 06:08:19,810 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 156 [2020-12-23 06:08:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:19,810 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-12-23 06:08:19,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:08:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-12-23 06:08:19,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 06:08:19,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:19,812 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:20,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:08:20,013 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash 345896024, now seen corresponding path program 37 times [2020-12-23 06:08:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047407714] [2020-12-23 06:08:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047407714] [2020-12-23 06:08:21,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758712420] [2020-12-23 06:08:21,006 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:08:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:08:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573366265] [2020-12-23 06:08:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:08:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:08:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:21,505 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 42 states. [2020-12-23 06:08:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:21,672 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2020-12-23 06:08:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:08:21,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 160 [2020-12-23 06:08:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:21,674 INFO L225 Difference]: With dead ends: 176 [2020-12-23 06:08:21,674 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 06:08:21,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 06:08:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-12-23 06:08:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 06:08:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2020-12-23 06:08:21,680 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2020-12-23 06:08:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:21,681 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2020-12-23 06:08:21,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:08:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2020-12-23 06:08:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 06:08:21,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:21,682 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:21,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:21,897 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:21,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1425128929, now seen corresponding path program 38 times [2020-12-23 06:08:21,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:21,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701720869] [2020-12-23 06:08:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:23,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701720869] [2020-12-23 06:08:23,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814263595] [2020-12-23 06:08:23,043 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:23,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:23,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:08:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:23,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:23,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:08:23,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201652899] [2020-12-23 06:08:23,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:08:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:08:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:23,533 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 43 states. [2020-12-23 06:08:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:23,688 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2020-12-23 06:08:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:08:23,689 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 164 [2020-12-23 06:08:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:23,693 INFO L225 Difference]: With dead ends: 180 [2020-12-23 06:08:23,693 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 06:08:23,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 06:08:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-12-23 06:08:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 06:08:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2020-12-23 06:08:23,699 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 164 [2020-12-23 06:08:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:23,699 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2020-12-23 06:08:23,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:08:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2020-12-23 06:08:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 06:08:23,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:23,700 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:23,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:23,916 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash -779856794, now seen corresponding path program 39 times [2020-12-23 06:08:23,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:23,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945309649] [2020-12-23 06:08:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:24,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945309649] [2020-12-23 06:08:24,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625019342] [2020-12-23 06:08:24,986 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2020-12-23 06:08:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:08:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:25,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:25,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:08:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746350650] [2020-12-23 06:08:25,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:08:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:08:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:25,591 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 44 states. [2020-12-23 06:08:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:25,791 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-12-23 06:08:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:08:25,792 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 168 [2020-12-23 06:08:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:25,793 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:08:25,794 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 06:08:25,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 06:08:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-12-23 06:08:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 06:08:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-12-23 06:08:25,800 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 168 [2020-12-23 06:08:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:25,800 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-12-23 06:08:25,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:08:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-12-23 06:08:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 06:08:25,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:25,801 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:26,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 06:08:26,015 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash -829822163, now seen corresponding path program 40 times [2020-12-23 06:08:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:26,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687427742] [2020-12-23 06:08:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:27,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687427742] [2020-12-23 06:08:27,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616414805] [2020-12-23 06:08:27,252 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:27,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:08:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:27,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:27,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:08:27,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214193283] [2020-12-23 06:08:27,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:08:27,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:08:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:27,777 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 45 states. [2020-12-23 06:08:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:27,978 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-12-23 06:08:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:08:27,979 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 172 [2020-12-23 06:08:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:27,980 INFO L225 Difference]: With dead ends: 188 [2020-12-23 06:08:27,980 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 06:08:27,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 06:08:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-12-23 06:08:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 06:08:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2020-12-23 06:08:27,991 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 172 [2020-12-23 06:08:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:27,991 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2020-12-23 06:08:27,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:08:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2020-12-23 06:08:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 06:08:27,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:27,992 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:28,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:28,206 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:28,207 INFO L82 PathProgramCache]: Analyzing trace with hash 231261812, now seen corresponding path program 41 times [2020-12-23 06:08:28,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:28,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212997472] [2020-12-23 06:08:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212997472] [2020-12-23 06:08:29,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15913556] [2020-12-23 06:08:29,435 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:29,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-23 06:08:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:08:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:30,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:08:30,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305450978] [2020-12-23 06:08:30,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:08:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:08:30,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:30,039 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 46 states. [2020-12-23 06:08:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:30,246 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-12-23 06:08:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:08:30,246 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 176 [2020-12-23 06:08:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:30,248 INFO L225 Difference]: With dead ends: 192 [2020-12-23 06:08:30,248 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 06:08:30,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 06:08:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-12-23 06:08:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 06:08:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2020-12-23 06:08:30,254 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 176 [2020-12-23 06:08:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:30,255 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2020-12-23 06:08:30,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:08:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2020-12-23 06:08:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 06:08:30,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:30,256 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:30,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:30,469 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1878350277, now seen corresponding path program 42 times [2020-12-23 06:08:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:30,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427152009] [2020-12-23 06:08:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:31,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427152009] [2020-12-23 06:08:31,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163325082] [2020-12-23 06:08:31,788 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:32,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-23 06:08:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:32,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:08:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:32,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:32,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:08:32,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846549201] [2020-12-23 06:08:32,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:08:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:08:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:32,414 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 47 states. [2020-12-23 06:08:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:32,603 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2020-12-23 06:08:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:08:32,604 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 180 [2020-12-23 06:08:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:32,605 INFO L225 Difference]: With dead ends: 196 [2020-12-23 06:08:32,606 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 06:08:32,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 06:08:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-12-23 06:08:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 06:08:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-12-23 06:08:32,611 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 180 [2020-12-23 06:08:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:32,612 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-12-23 06:08:32,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:08:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-12-23 06:08:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 06:08:32,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:32,613 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:32,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:08:32,826 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1530481282, now seen corresponding path program 43 times [2020-12-23 06:08:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:32,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736801181] [2020-12-23 06:08:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736801181] [2020-12-23 06:08:34,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923618458] [2020-12-23 06:08:34,199 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:08:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:34,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:08:34,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728701055] [2020-12-23 06:08:34,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:08:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:08:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:34,775 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 48 states. [2020-12-23 06:08:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:34,949 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2020-12-23 06:08:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:08:34,950 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 184 [2020-12-23 06:08:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:34,951 INFO L225 Difference]: With dead ends: 200 [2020-12-23 06:08:34,951 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 06:08:34,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 06:08:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-12-23 06:08:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 06:08:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2020-12-23 06:08:34,957 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 184 [2020-12-23 06:08:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:34,958 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2020-12-23 06:08:34,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:08:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2020-12-23 06:08:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 06:08:34,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:34,959 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:35,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:08:35,173 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:35,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash -362908855, now seen corresponding path program 44 times [2020-12-23 06:08:35,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:35,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7910742] [2020-12-23 06:08:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:36,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7910742] [2020-12-23 06:08:36,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150579221] [2020-12-23 06:08:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:36,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:08:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:37,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:37,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:08:37,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299200970] [2020-12-23 06:08:37,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:08:37,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:08:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:37,235 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 49 states. [2020-12-23 06:08:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:37,454 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-12-23 06:08:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:08:37,454 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 188 [2020-12-23 06:08:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:37,455 INFO L225 Difference]: With dead ends: 204 [2020-12-23 06:08:37,455 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 06:08:37,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 06:08:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-23 06:08:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 06:08:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-12-23 06:08:37,461 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 188 [2020-12-23 06:08:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:37,462 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-12-23 06:08:37,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:08:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-12-23 06:08:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-23 06:08:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:37,463 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:37,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 06:08:37,677 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1650204528, now seen corresponding path program 45 times [2020-12-23 06:08:37,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:37,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655837560] [2020-12-23 06:08:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:39,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655837560] [2020-12-23 06:08:39,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546127868] [2020-12-23 06:08:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:39,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2020-12-23 06:08:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:08:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:39,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:39,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:08:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635022347] [2020-12-23 06:08:39,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:08:39,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:08:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:39,874 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 50 states. [2020-12-23 06:08:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:40,087 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2020-12-23 06:08:40,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:08:40,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 192 [2020-12-23 06:08:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:40,089 INFO L225 Difference]: With dead ends: 208 [2020-12-23 06:08:40,089 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 06:08:40,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 06:08:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-12-23 06:08:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 06:08:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-12-23 06:08:40,094 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 192 [2020-12-23 06:08:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:40,094 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-12-23 06:08:40,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:08:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-12-23 06:08:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 06:08:40,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:40,095 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:40,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:40,307 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash 710103639, now seen corresponding path program 46 times [2020-12-23 06:08:40,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:40,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861772664] [2020-12-23 06:08:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861772664] [2020-12-23 06:08:41,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435792371] [2020-12-23 06:08:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:42,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:08:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:42,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:42,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:08:42,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504754089] [2020-12-23 06:08:42,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:08:42,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:42,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:08:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:42,440 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 51 states. [2020-12-23 06:08:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:42,685 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-12-23 06:08:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:08:42,685 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 196 [2020-12-23 06:08:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:42,687 INFO L225 Difference]: With dead ends: 212 [2020-12-23 06:08:42,687 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 06:08:42,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 06:08:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-12-23 06:08:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 06:08:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2020-12-23 06:08:42,693 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 196 [2020-12-23 06:08:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:42,694 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2020-12-23 06:08:42,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:08:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2020-12-23 06:08:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-23 06:08:42,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:42,695 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:42,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:08:42,910 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash 181831838, now seen corresponding path program 47 times [2020-12-23 06:08:42,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:42,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276874926] [2020-12-23 06:08:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:44,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276874926] [2020-12-23 06:08:44,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695519022] [2020-12-23 06:08:44,561 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:45,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-23 06:08:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:08:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:45,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:08:45,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766934451] [2020-12-23 06:08:45,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:08:45,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:08:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:08:45,325 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 52 states. [2020-12-23 06:08:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:45,560 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-12-23 06:08:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:08:45,561 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 200 [2020-12-23 06:08:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:45,562 INFO L225 Difference]: With dead ends: 216 [2020-12-23 06:08:45,562 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 06:08:45,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:08:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 06:08:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-12-23 06:08:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 06:08:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2020-12-23 06:08:45,568 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 200 [2020-12-23 06:08:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:45,569 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2020-12-23 06:08:45,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:08:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2020-12-23 06:08:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-23 06:08:45,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:45,571 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:45,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:45,786 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash -289979547, now seen corresponding path program 48 times [2020-12-23 06:08:45,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:45,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62102159] [2020-12-23 06:08:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:47,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62102159] [2020-12-23 06:08:47,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477130965] [2020-12-23 06:08:47,479 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 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 [2020-12-23 06:08:48,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2020-12-23 06:08:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:08:48,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:48,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:48,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:08:48,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008325067] [2020-12-23 06:08:48,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:08:48,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:48,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:08:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:08:48,256 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 53 states. [2020-12-23 06:08:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:48,487 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2020-12-23 06:08:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:08:48,487 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 204 [2020-12-23 06:08:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:48,489 INFO L225 Difference]: With dead ends: 220 [2020-12-23 06:08:48,489 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 06:08:48,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:08:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 06:08:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2020-12-23 06:08:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 06:08:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2020-12-23 06:08:48,495 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 204 [2020-12-23 06:08:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:48,496 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2020-12-23 06:08:48,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:08:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2020-12-23 06:08:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-23 06:08:48,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:48,497 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:48,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:48,712 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 715080364, now seen corresponding path program 49 times [2020-12-23 06:08:48,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:48,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975852958] [2020-12-23 06:08:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975852958] [2020-12-23 06:08:50,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649240012] [2020-12-23 06:08:50,571 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 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 [2020-12-23 06:08:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:08:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:51,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:51,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:08:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336297146] [2020-12-23 06:08:51,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:08:51,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:08:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:08:51,250 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 54 states. [2020-12-23 06:08:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:51,498 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2020-12-23 06:08:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:08:51,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 208 [2020-12-23 06:08:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:51,500 INFO L225 Difference]: With dead ends: 224 [2020-12-23 06:08:51,500 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 06:08:51,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:08:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 06:08:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-12-23 06:08:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-23 06:08:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-12-23 06:08:51,506 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 208 [2020-12-23 06:08:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:51,506 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-12-23 06:08:51,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:08:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-12-23 06:08:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-23 06:08:51,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:51,508 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:51,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 06:08:51,723 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash 676873843, now seen corresponding path program 50 times [2020-12-23 06:08:51,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:51,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830979004] [2020-12-23 06:08:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830979004] [2020-12-23 06:08:53,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421529446] [2020-12-23 06:08:53,570 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 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 [2020-12-23 06:08:53,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:53,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1820 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:08:53,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:54,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:54,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:08:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461687294] [2020-12-23 06:08:54,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:08:54,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:08:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:08:54,211 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 55 states. [2020-12-23 06:08:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:54,431 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2020-12-23 06:08:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:08:54,432 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 212 [2020-12-23 06:08:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:54,434 INFO L225 Difference]: With dead ends: 228 [2020-12-23 06:08:54,434 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 06:08:54,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:08:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 06:08:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-12-23 06:08:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-23 06:08:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2020-12-23 06:08:54,440 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 212 [2020-12-23 06:08:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:54,441 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2020-12-23 06:08:54,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:08:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2020-12-23 06:08:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 06:08:54,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:54,442 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:54,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:54,658 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash -691269958, now seen corresponding path program 51 times [2020-12-23 06:08:54,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:54,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019741666] [2020-12-23 06:08:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:56,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019741666] [2020-12-23 06:08:56,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997652393] [2020-12-23 06:08:56,615 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 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 [2020-12-23 06:08:57,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2020-12-23 06:08:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:57,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:08:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:57,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:57,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:08:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715914751] [2020-12-23 06:08:57,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:08:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:08:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:08:57,445 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand 56 states. [2020-12-23 06:08:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:57,694 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-12-23 06:08:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:08:57,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 216 [2020-12-23 06:08:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:57,696 INFO L225 Difference]: With dead ends: 232 [2020-12-23 06:08:57,696 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 06:08:57,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:08:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 06:08:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-12-23 06:08:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 06:08:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-12-23 06:08:57,703 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 216 [2020-12-23 06:08:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:57,703 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-12-23 06:08:57,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:08:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-12-23 06:08:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-23 06:08:57,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:57,705 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:57,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:08:57,919 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash 436493185, now seen corresponding path program 52 times [2020-12-23 06:08:57,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:57,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180319216] [2020-12-23 06:08:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:59,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180319216] [2020-12-23 06:08:59,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042099243] [2020-12-23 06:08:59,916 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:00,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:00,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:09:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:00,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:00,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:09:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644848732] [2020-12-23 06:09:00,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:09:00,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:09:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:09:00,648 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 57 states. [2020-12-23 06:09:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:00,926 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-12-23 06:09:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:09:00,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 220 [2020-12-23 06:09:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:00,928 INFO L225 Difference]: With dead ends: 236 [2020-12-23 06:09:00,928 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 06:09:00,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:09:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 06:09:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-12-23 06:09:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-23 06:09:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2020-12-23 06:09:00,934 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 220 [2020-12-23 06:09:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:00,935 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2020-12-23 06:09:00,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:09:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2020-12-23 06:09:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-23 06:09:00,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:00,936 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:01,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 06:09:01,153 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash 992668872, now seen corresponding path program 53 times [2020-12-23 06:09:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:01,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114625528] [2020-12-23 06:09:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114625528] [2020-12-23 06:09:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521684614] [2020-12-23 06:09:03,198 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:03,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2020-12-23 06:09:03,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:09:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:04,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:04,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:09:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635742918] [2020-12-23 06:09:04,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:09:04,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:09:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:09:04,009 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 58 states. [2020-12-23 06:09:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:04,287 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2020-12-23 06:09:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:09:04,287 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 224 [2020-12-23 06:09:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:04,288 INFO L225 Difference]: With dead ends: 240 [2020-12-23 06:09:04,288 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 06:09:04,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:09:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 06:09:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-12-23 06:09:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-23 06:09:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2020-12-23 06:09:04,295 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 224 [2020-12-23 06:09:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:04,295 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2020-12-23 06:09:04,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:09:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2020-12-23 06:09:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-23 06:09:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:04,297 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:04,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:04,511 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1485406863, now seen corresponding path program 54 times [2020-12-23 06:09:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:04,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30552198] [2020-12-23 06:09:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30552198] [2020-12-23 06:09:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082862685] [2020-12-23 06:09:06,688 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:07,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2020-12-23 06:09:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:09:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:07,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:07,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:09:07,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995819067] [2020-12-23 06:09:07,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:09:07,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:09:07,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:09:07,576 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand 59 states. [2020-12-23 06:09:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:07,848 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-12-23 06:09:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:09:07,848 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 228 [2020-12-23 06:09:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:07,849 INFO L225 Difference]: With dead ends: 244 [2020-12-23 06:09:07,849 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 06:09:07,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:09:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 06:09:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-12-23 06:09:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-23 06:09:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-12-23 06:09:07,855 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 228 [2020-12-23 06:09:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:07,855 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-12-23 06:09:07,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:09:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-12-23 06:09:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-23 06:09:07,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:07,856 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:08,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 06:09:08,057 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -712385322, now seen corresponding path program 55 times [2020-12-23 06:09:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730502015] [2020-12-23 06:09:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:10,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730502015] [2020-12-23 06:09:10,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658317668] [2020-12-23 06:09:10,241 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:09:10,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:10,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:10,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:09:10,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394728718] [2020-12-23 06:09:10,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:09:10,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:09:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:09:10,994 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 60 states. [2020-12-23 06:09:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:11,329 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2020-12-23 06:09:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:09:11,329 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 232 [2020-12-23 06:09:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:11,331 INFO L225 Difference]: With dead ends: 248 [2020-12-23 06:09:11,331 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 06:09:11,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:09:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 06:09:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-12-23 06:09:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-23 06:09:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2020-12-23 06:09:11,337 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 232 [2020-12-23 06:09:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:11,338 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2020-12-23 06:09:11,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:09:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2020-12-23 06:09:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-23 06:09:11,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:11,340 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:11,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:11,553 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash -894059619, now seen corresponding path program 56 times [2020-12-23 06:09:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:11,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260071446] [2020-12-23 06:09:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260071446] [2020-12-23 06:09:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140147177] [2020-12-23 06:09:13,868 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:14,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:14,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:09:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:14,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:14,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:09:14,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826987698] [2020-12-23 06:09:14,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:09:14,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:09:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:14,612 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 61 states. [2020-12-23 06:09:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:14,909 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-12-23 06:09:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:09:14,909 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 236 [2020-12-23 06:09:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:14,910 INFO L225 Difference]: With dead ends: 252 [2020-12-23 06:09:14,910 INFO L226 Difference]: Without dead ends: 245 [2020-12-23 06:09:14,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-23 06:09:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-12-23 06:09:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-23 06:09:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2020-12-23 06:09:14,918 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 236 [2020-12-23 06:09:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:14,919 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2020-12-23 06:09:14,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:09:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2020-12-23 06:09:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-23 06:09:14,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:14,921 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:15,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:09:15,135 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1974918884, now seen corresponding path program 57 times [2020-12-23 06:09:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:15,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102894504] [2020-12-23 06:09:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102894504] [2020-12-23 06:09:17,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844283167] [2020-12-23 06:09:17,570 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2020-12-23 06:09:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:09:18,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:18,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:09:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145089681] [2020-12-23 06:09:18,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:09:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:09:18,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:18,512 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand 62 states. [2020-12-23 06:09:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:18,772 INFO L93 Difference]: Finished difference Result 256 states and 258 transitions. [2020-12-23 06:09:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:09:18,773 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 240 [2020-12-23 06:09:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:18,775 INFO L225 Difference]: With dead ends: 256 [2020-12-23 06:09:18,775 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 06:09:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 06:09:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2020-12-23 06:09:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-12-23 06:09:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2020-12-23 06:09:18,781 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 240 [2020-12-23 06:09:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:18,781 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2020-12-23 06:09:18,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:09:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2020-12-23 06:09:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-23 06:09:18,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:18,783 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:18,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:18,998 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1453914453, now seen corresponding path program 58 times [2020-12-23 06:09:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:18,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799988795] [2020-12-23 06:09:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799988795] [2020-12-23 06:09:21,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103224667] [2020-12-23 06:09:21,451 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:21,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:21,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:09:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:22,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:22,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:09:22,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567700734] [2020-12-23 06:09:22,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:09:22,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:22,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:09:22,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:22,231 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 63 states. [2020-12-23 06:09:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:22,504 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2020-12-23 06:09:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:09:22,504 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 244 [2020-12-23 06:09:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:22,505 INFO L225 Difference]: With dead ends: 260 [2020-12-23 06:09:22,505 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 06:09:22,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 06:09:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-12-23 06:09:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-23 06:09:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2020-12-23 06:09:22,510 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 244 [2020-12-23 06:09:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:22,510 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2020-12-23 06:09:22,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:09:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2020-12-23 06:09:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-12-23 06:09:22,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:22,511 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:22,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-23 06:09:22,712 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1031795442, now seen corresponding path program 59 times [2020-12-23 06:09:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:22,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857535606] [2020-12-23 06:09:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857535606] [2020-12-23 06:09:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989615021] [2020-12-23 06:09:25,289 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:25,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2020-12-23 06:09:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:09:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:26,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:26,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:09:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841095392] [2020-12-23 06:09:26,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:09:26,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:09:26,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:26,204 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 64 states. [2020-12-23 06:09:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:26,491 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2020-12-23 06:09:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:09:26,491 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 248 [2020-12-23 06:09:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:26,493 INFO L225 Difference]: With dead ends: 264 [2020-12-23 06:09:26,493 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 06:09:26,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 06:09:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2020-12-23 06:09:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-12-23 06:09:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2020-12-23 06:09:26,502 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 248 [2020-12-23 06:09:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:26,502 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2020-12-23 06:09:26,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:09:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2020-12-23 06:09:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-23 06:09:26,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:26,504 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:26,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:26,717 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:26,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2134598585, now seen corresponding path program 60 times [2020-12-23 06:09:26,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:26,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721068886] [2020-12-23 06:09:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721068886] [2020-12-23 06:09:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445832488] [2020-12-23 06:09:29,361 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:30,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2020-12-23 06:09:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:30,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:09:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:30,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:30,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:09:30,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124468347] [2020-12-23 06:09:30,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:09:30,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:09:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:30,358 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand 65 states. [2020-12-23 06:09:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:30,694 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-12-23 06:09:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:09:30,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 252 [2020-12-23 06:09:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:30,696 INFO L225 Difference]: With dead ends: 268 [2020-12-23 06:09:30,696 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 06:09:30,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 06:09:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2020-12-23 06:09:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-12-23 06:09:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-12-23 06:09:30,703 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 252 [2020-12-23 06:09:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:30,703 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-12-23 06:09:30,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:09:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-12-23 06:09:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-23 06:09:30,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:30,705 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:30,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 06:09:30,920 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1598875392, now seen corresponding path program 61 times [2020-12-23 06:09:30,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:30,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053415680] [2020-12-23 06:09:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:33,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053415680] [2020-12-23 06:09:33,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144269654] [2020-12-23 06:09:33,641 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:09:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:34,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:34,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:09:34,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760492506] [2020-12-23 06:09:34,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:09:34,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:09:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:09:34,495 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 66 states. [2020-12-23 06:09:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:34,790 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-12-23 06:09:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:09:34,791 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 256 [2020-12-23 06:09:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:34,792 INFO L225 Difference]: With dead ends: 272 [2020-12-23 06:09:34,792 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 06:09:34,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:09:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 06:09:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-12-23 06:09:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 06:09:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2020-12-23 06:09:34,798 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 256 [2020-12-23 06:09:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:34,798 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2020-12-23 06:09:34,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:09:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2020-12-23 06:09:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-23 06:09:34,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:34,800 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:35,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:35,015 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 691065543, now seen corresponding path program 62 times [2020-12-23 06:09:35,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:35,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238120651] [2020-12-23 06:09:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238120651] [2020-12-23 06:09:37,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007553252] [2020-12-23 06:09:37,844 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:38,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:09:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:38,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:38,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:09:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26765982] [2020-12-23 06:09:38,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:09:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:38,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:09:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:09:38,679 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 67 states. [2020-12-23 06:09:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:39,013 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2020-12-23 06:09:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:09:39,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 260 [2020-12-23 06:09:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:39,015 INFO L225 Difference]: With dead ends: 276 [2020-12-23 06:09:39,015 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 06:09:39,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:09:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 06:09:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2020-12-23 06:09:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-23 06:09:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2020-12-23 06:09:39,019 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 260 [2020-12-23 06:09:39,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:39,019 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2020-12-23 06:09:39,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:09:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2020-12-23 06:09:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-23 06:09:39,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:39,020 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:39,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:09:39,221 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1696485646, now seen corresponding path program 63 times [2020-12-23 06:09:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272409219] [2020-12-23 06:09:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:42,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272409219] [2020-12-23 06:09:42,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283916648] [2020-12-23 06:09:42,194 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:42,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2020-12-23 06:09:42,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:09:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:43,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:43,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:09:43,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147820097] [2020-12-23 06:09:43,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:09:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:43,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:09:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:09:43,243 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand 68 states. [2020-12-23 06:09:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:43,587 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-12-23 06:09:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:09:43,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 264 [2020-12-23 06:09:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:43,588 INFO L225 Difference]: With dead ends: 280 [2020-12-23 06:09:43,588 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 06:09:43,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:09:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 06:09:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-12-23 06:09:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-23 06:09:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2020-12-23 06:09:43,592 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 264 [2020-12-23 06:09:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:43,593 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2020-12-23 06:09:43,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:09:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2020-12-23 06:09:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-12-23 06:09:43,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:43,594 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:43,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:09:43,795 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:43,796 INFO L82 PathProgramCache]: Analyzing trace with hash -704293931, now seen corresponding path program 64 times [2020-12-23 06:09:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:43,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207835937] [2020-12-23 06:09:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:46,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207835937] [2020-12-23 06:09:46,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728345408] [2020-12-23 06:09:46,836 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:47,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2296 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:09:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:47,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:47,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:09:47,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489804058] [2020-12-23 06:09:47,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:09:47,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:09:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:09:47,728 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 69 states. [2020-12-23 06:09:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:48,111 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2020-12-23 06:09:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:09:48,111 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 268 [2020-12-23 06:09:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:48,113 INFO L225 Difference]: With dead ends: 284 [2020-12-23 06:09:48,113 INFO L226 Difference]: Without dead ends: 277 [2020-12-23 06:09:48,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:09:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-23 06:09:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2020-12-23 06:09:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-23 06:09:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2020-12-23 06:09:48,119 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 268 [2020-12-23 06:09:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:48,119 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2020-12-23 06:09:48,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:09:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2020-12-23 06:09:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-23 06:09:48,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:48,121 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:48,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 06:09:48,335 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1567646948, now seen corresponding path program 65 times [2020-12-23 06:09:48,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:48,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298322257] [2020-12-23 06:09:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:51,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298322257] [2020-12-23 06:09:51,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345052171] [2020-12-23 06:09:51,448 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:52,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2020-12-23 06:09:52,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:52,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:09:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:52,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:52,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:09:52,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167832800] [2020-12-23 06:09:52,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:09:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:09:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:09:52,496 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 70 states. [2020-12-23 06:09:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:52,822 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2020-12-23 06:09:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:09:52,826 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 272 [2020-12-23 06:09:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:52,828 INFO L225 Difference]: With dead ends: 288 [2020-12-23 06:09:52,828 INFO L226 Difference]: Without dead ends: 281 [2020-12-23 06:09:52,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:09:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-23 06:09:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-12-23 06:09:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 06:09:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 279 transitions. [2020-12-23 06:09:52,835 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 279 transitions. Word has length 272 [2020-12-23 06:09:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 279 transitions. [2020-12-23 06:09:52,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:09:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 279 transitions. [2020-12-23 06:09:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-23 06:09:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:52,837 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:53,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:53,052 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash 109504227, now seen corresponding path program 66 times [2020-12-23 06:09:53,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:53,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732155767] [2020-12-23 06:09:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:56,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732155767] [2020-12-23 06:09:56,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290167125] [2020-12-23 06:09:56,323 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:57,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2020-12-23 06:09:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:09:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:57,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:09:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693247359] [2020-12-23 06:09:57,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:09:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:09:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:09:57,491 INFO L87 Difference]: Start difference. First operand 278 states and 279 transitions. Second operand 71 states. [2020-12-23 06:09:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:57,877 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2020-12-23 06:09:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:09:57,877 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 276 [2020-12-23 06:09:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:57,879 INFO L225 Difference]: With dead ends: 292 [2020-12-23 06:09:57,879 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 06:09:57,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:09:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 06:09:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-12-23 06:09:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 06:09:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2020-12-23 06:09:57,883 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 276 [2020-12-23 06:09:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2020-12-23 06:09:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:09:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2020-12-23 06:09:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-12-23 06:09:57,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:57,886 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:58,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:09:58,100 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1026230486, now seen corresponding path program 67 times [2020-12-23 06:09:58,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:58,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90544725] [2020-12-23 06:09:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90544725] [2020-12-23 06:10:01,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249337182] [2020-12-23 06:10:01,476 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2398 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:10:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:02,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:02,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:10:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816578205] [2020-12-23 06:10:02,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:10:02,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:02,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:10:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:10:02,365 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 72 states. [2020-12-23 06:10:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:02,710 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2020-12-23 06:10:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:10:02,710 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 280 [2020-12-23 06:10:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:02,711 INFO L225 Difference]: With dead ends: 296 [2020-12-23 06:10:02,711 INFO L226 Difference]: Without dead ends: 289 [2020-12-23 06:10:02,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:10:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-23 06:10:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2020-12-23 06:10:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-23 06:10:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-12-23 06:10:02,717 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2020-12-23 06:10:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:02,717 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-12-23 06:10:02,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:10:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-12-23 06:10:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-12-23 06:10:02,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:02,719 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:02,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:02,934 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1920758799, now seen corresponding path program 68 times [2020-12-23 06:10:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:02,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348543471] [2020-12-23 06:10:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:06,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348543471] [2020-12-23 06:10:06,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119402729] [2020-12-23 06:10:06,374 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:06,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:06,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:06,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:10:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:07,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:07,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:10:07,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144617345] [2020-12-23 06:10:07,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:10:07,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:10:07,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:07,321 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 73 states. [2020-12-23 06:10:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:07,649 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2020-12-23 06:10:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:10:07,649 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 284 [2020-12-23 06:10:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:07,650 INFO L225 Difference]: With dead ends: 300 [2020-12-23 06:10:07,650 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 06:10:07,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 06:10:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2020-12-23 06:10:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-23 06:10:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2020-12-23 06:10:07,654 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 284 [2020-12-23 06:10:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:07,655 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2020-12-23 06:10:07,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:10:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2020-12-23 06:10:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-23 06:10:07,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:07,657 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:07,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 06:10:07,871 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2118359752, now seen corresponding path program 69 times [2020-12-23 06:10:07,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:07,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760714553] [2020-12-23 06:10:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760714553] [2020-12-23 06:10:11,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941114609] [2020-12-23 06:10:11,363 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:12,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2020-12-23 06:10:12,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:10:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:12,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:12,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:10:12,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968786090] [2020-12-23 06:10:12,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:10:12,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:10:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:12,546 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand 74 states. [2020-12-23 06:10:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:12,870 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-12-23 06:10:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:10:12,871 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 288 [2020-12-23 06:10:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:12,872 INFO L225 Difference]: With dead ends: 304 [2020-12-23 06:10:12,872 INFO L226 Difference]: Without dead ends: 297 [2020-12-23 06:10:12,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-23 06:10:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2020-12-23 06:10:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-12-23 06:10:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2020-12-23 06:10:12,877 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 288 [2020-12-23 06:10:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:12,877 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2020-12-23 06:10:12,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:10:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2020-12-23 06:10:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2020-12-23 06:10:12,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:12,879 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:13,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:13,094 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1882635521, now seen corresponding path program 70 times [2020-12-23 06:10:13,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:13,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232512051] [2020-12-23 06:10:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232512051] [2020-12-23 06:10:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469977524] [2020-12-23 06:10:16,787 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:17,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:10:17,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:17,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:17,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:10:17,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398072491] [2020-12-23 06:10:17,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:10:17,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:10:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:10:17,725 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 75 states. [2020-12-23 06:10:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:18,134 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2020-12-23 06:10:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:10:18,135 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 292 [2020-12-23 06:10:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:18,136 INFO L225 Difference]: With dead ends: 308 [2020-12-23 06:10:18,137 INFO L226 Difference]: Without dead ends: 301 [2020-12-23 06:10:18,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:10:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-23 06:10:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-12-23 06:10:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-23 06:10:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-12-23 06:10:18,142 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 292 [2020-12-23 06:10:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:18,142 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-12-23 06:10:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:10:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-12-23 06:10:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-23 06:10:18,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:18,144 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:18,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:18,357 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash -317463226, now seen corresponding path program 71 times [2020-12-23 06:10:18,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:18,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292467543] [2020-12-23 06:10:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:22,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292467543] [2020-12-23 06:10:22,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113310570] [2020-12-23 06:10:22,163 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:22,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2020-12-23 06:10:22,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:22,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:10:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:23,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:23,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:10:23,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97118242] [2020-12-23 06:10:23,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:10:23,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:23,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:10:23,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:10:23,323 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 76 states. [2020-12-23 06:10:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:23,714 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2020-12-23 06:10:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:10:23,715 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 296 [2020-12-23 06:10:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:23,717 INFO L225 Difference]: With dead ends: 312 [2020-12-23 06:10:23,717 INFO L226 Difference]: Without dead ends: 305 [2020-12-23 06:10:23,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:10:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-23 06:10:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-12-23 06:10:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-23 06:10:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2020-12-23 06:10:23,723 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 296 [2020-12-23 06:10:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:23,724 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2020-12-23 06:10:23,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:10:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2020-12-23 06:10:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-12-23 06:10:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:23,726 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:23,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:23,939 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2077881331, now seen corresponding path program 72 times [2020-12-23 06:10:23,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:23,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456639587] [2020-12-23 06:10:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:27,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456639587] [2020-12-23 06:10:27,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865152609] [2020-12-23 06:10:27,776 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:28,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2020-12-23 06:10:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:10:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:29,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:29,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:10:29,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070895476] [2020-12-23 06:10:29,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:10:29,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:10:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:10:29,043 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand 77 states. [2020-12-23 06:10:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:29,653 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2020-12-23 06:10:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:10:29,654 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 300 [2020-12-23 06:10:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:29,655 INFO L225 Difference]: With dead ends: 316 [2020-12-23 06:10:29,655 INFO L226 Difference]: Without dead ends: 309 [2020-12-23 06:10:29,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:10:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-23 06:10:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2020-12-23 06:10:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-23 06:10:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2020-12-23 06:10:29,660 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 300 [2020-12-23 06:10:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:29,660 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2020-12-23 06:10:29,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:10:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2020-12-23 06:10:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-12-23 06:10:29,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:29,662 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:29,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-23 06:10:29,862 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1688827732, now seen corresponding path program 73 times [2020-12-23 06:10:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:29,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965910577] [2020-12-23 06:10:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965910577] [2020-12-23 06:10:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24562331] [2020-12-23 06:10:34,117 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2602 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:10:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:35,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:35,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:10:35,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734031676] [2020-12-23 06:10:35,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:10:35,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:35,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:10:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:10:35,211 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand 78 states. [2020-12-23 06:10:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:35,694 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2020-12-23 06:10:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:10:35,695 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 304 [2020-12-23 06:10:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:35,696 INFO L225 Difference]: With dead ends: 320 [2020-12-23 06:10:35,696 INFO L226 Difference]: Without dead ends: 313 [2020-12-23 06:10:35,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:10:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-23 06:10:35,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2020-12-23 06:10:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-23 06:10:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2020-12-23 06:10:35,701 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2020-12-23 06:10:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:35,702 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2020-12-23 06:10:35,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:10:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2020-12-23 06:10:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-12-23 06:10:35,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:35,704 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:35,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:35,910 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 862447387, now seen corresponding path program 74 times [2020-12-23 06:10:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:35,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568064480] [2020-12-23 06:10:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:40,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568064480] [2020-12-23 06:10:40,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449985215] [2020-12-23 06:10:40,368 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:10:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:41,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:41,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:10:41,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945477910] [2020-12-23 06:10:41,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:10:41,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:10:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:10:41,419 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 79 states. [2020-12-23 06:10:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:42,017 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2020-12-23 06:10:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:10:42,018 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 308 [2020-12-23 06:10:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:42,019 INFO L225 Difference]: With dead ends: 324 [2020-12-23 06:10:42,019 INFO L226 Difference]: Without dead ends: 317 [2020-12-23 06:10:42,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:10:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-23 06:10:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2020-12-23 06:10:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-12-23 06:10:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 315 transitions. [2020-12-23 06:10:42,030 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 315 transitions. Word has length 308 [2020-12-23 06:10:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:42,031 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 315 transitions. [2020-12-23 06:10:42,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:10:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 315 transitions. [2020-12-23 06:10:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-12-23 06:10:42,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:42,033 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:42,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:42,249 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1706353822, now seen corresponding path program 75 times [2020-12-23 06:10:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:42,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295527392] [2020-12-23 06:10:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295527392] [2020-12-23 06:10:46,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127730725] [2020-12-23 06:10:46,727 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:47,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2020-12-23 06:10:47,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:10:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:48,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:48,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:10:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442130226] [2020-12-23 06:10:48,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:10:48,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:10:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:10:48,119 INFO L87 Difference]: Start difference. First operand 314 states and 315 transitions. Second operand 80 states. [2020-12-23 06:10:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:48,627 INFO L93 Difference]: Finished difference Result 328 states and 330 transitions. [2020-12-23 06:10:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:10:48,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 312 [2020-12-23 06:10:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:48,629 INFO L225 Difference]: With dead ends: 328 [2020-12-23 06:10:48,629 INFO L226 Difference]: Without dead ends: 321 [2020-12-23 06:10:48,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:10:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-23 06:10:48,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-12-23 06:10:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-23 06:10:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2020-12-23 06:10:48,634 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 312 [2020-12-23 06:10:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:48,634 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2020-12-23 06:10:48,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:10:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2020-12-23 06:10:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-12-23 06:10:48,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:48,636 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:48,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:10:48,850 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:48,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:48,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1201875927, now seen corresponding path program 76 times [2020-12-23 06:10:48,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:48,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852890897] [2020-12-23 06:10:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:53,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852890897] [2020-12-23 06:10:53,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266721255] [2020-12-23 06:10:53,444 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:54,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:10:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:54,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:54,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 06:10:54,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580198607] [2020-12-23 06:10:54,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:10:54,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:54,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:10:54,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:10:54,528 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand 81 states. [2020-12-23 06:10:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:54,948 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2020-12-23 06:10:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:10:54,949 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 316 [2020-12-23 06:10:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:54,950 INFO L225 Difference]: With dead ends: 332 [2020-12-23 06:10:54,950 INFO L226 Difference]: Without dead ends: 325 [2020-12-23 06:10:54,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:10:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-23 06:10:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-12-23 06:10:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-23 06:10:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-12-23 06:10:54,955 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 316 [2020-12-23 06:10:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:54,956 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-12-23 06:10:54,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:10:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-12-23 06:10:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-12-23 06:10:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:54,957 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:55,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 06:10:55,158 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1849241232, now seen corresponding path program 77 times [2020-12-23 06:10:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:55,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290096971] [2020-12-23 06:10:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290096971] [2020-12-23 06:10:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391735562] [2020-12-23 06:10:59,919 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:00,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2020-12-23 06:11:00,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:11:00,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:01,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:01,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:11:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896332626] [2020-12-23 06:11:01,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:11:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:11:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:11:01,260 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 82 states. [2020-12-23 06:11:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:01,801 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2020-12-23 06:11:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:11:01,802 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 320 [2020-12-23 06:11:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:01,803 INFO L225 Difference]: With dead ends: 336 [2020-12-23 06:11:01,803 INFO L226 Difference]: Without dead ends: 329 [2020-12-23 06:11:01,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:11:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-23 06:11:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 326. [2020-12-23 06:11:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-23 06:11:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2020-12-23 06:11:01,816 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 320 [2020-12-23 06:11:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:01,817 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2020-12-23 06:11:01,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:11:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2020-12-23 06:11:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-12-23 06:11:01,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:01,819 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:02,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:02,033 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2144523063, now seen corresponding path program 78 times [2020-12-23 06:11:02,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:02,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868971411] [2020-12-23 06:11:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:06,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868971411] [2020-12-23 06:11:06,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890219270] [2020-12-23 06:11:06,969 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:07,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2020-12-23 06:11:07,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:07,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:11:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:08,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:08,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 06:11:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881900042] [2020-12-23 06:11:08,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:11:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:11:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:11:08,396 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand 83 states. [2020-12-23 06:11:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:08,966 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-12-23 06:11:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:11:08,967 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 324 [2020-12-23 06:11:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:08,968 INFO L225 Difference]: With dead ends: 340 [2020-12-23 06:11:08,968 INFO L226 Difference]: Without dead ends: 333 [2020-12-23 06:11:08,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:11:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-23 06:11:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2020-12-23 06:11:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-12-23 06:11:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-12-23 06:11:08,973 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 324 [2020-12-23 06:11:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:08,973 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-12-23 06:11:08,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:11:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-12-23 06:11:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-23 06:11:08,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:08,993 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:09,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:09,193 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1595238018, now seen corresponding path program 79 times [2020-12-23 06:11:09,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:09,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192412423] [2020-12-23 06:11:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:14,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192412423] [2020-12-23 06:11:14,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449810957] [2020-12-23 06:11:14,192 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2806 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:11:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:15,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:15,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 06:11:15,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224001156] [2020-12-23 06:11:15,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:11:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:11:15,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:11:15,284 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 84 states. [2020-12-23 06:11:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:15,857 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2020-12-23 06:11:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:11:15,857 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 328 [2020-12-23 06:11:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:15,859 INFO L225 Difference]: With dead ends: 344 [2020-12-23 06:11:15,859 INFO L226 Difference]: Without dead ends: 337 [2020-12-23 06:11:15,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:11:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-23 06:11:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-12-23 06:11:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-23 06:11:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-12-23 06:11:15,864 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 328 [2020-12-23 06:11:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:15,864 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-12-23 06:11:15,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:11:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-12-23 06:11:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-12-23 06:11:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:15,865 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:16,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:16,066 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1217913925, now seen corresponding path program 80 times [2020-12-23 06:11:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:16,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181006997] [2020-12-23 06:11:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:21,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181006997] [2020-12-23 06:11:21,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990968168] [2020-12-23 06:11:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:21,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:11:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:21,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2840 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:11:21,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:22,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:22,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-23 06:11:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600982094] [2020-12-23 06:11:22,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:11:22,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:11:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:11:22,399 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 85 states. [2020-12-23 06:11:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:22,932 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2020-12-23 06:11:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 06:11:22,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 332 [2020-12-23 06:11:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:22,936 INFO L225 Difference]: With dead ends: 348 [2020-12-23 06:11:22,936 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 06:11:22,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:11:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 06:11:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2020-12-23 06:11:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-12-23 06:11:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 339 transitions. [2020-12-23 06:11:22,943 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 339 transitions. Word has length 332 [2020-12-23 06:11:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:22,943 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 339 transitions. [2020-12-23 06:11:22,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:11:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 339 transitions. [2020-12-23 06:11:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-23 06:11:22,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:22,945 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:23,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:23,160 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:23,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1870951308, now seen corresponding path program 81 times [2020-12-23 06:11:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:23,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139378008] [2020-12-23 06:11:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:28,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139378008] [2020-12-23 06:11:28,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825180988] [2020-12-23 06:11:28,545 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:29,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2020-12-23 06:11:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:11:29,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:30,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:30,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 06:11:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532769556] [2020-12-23 06:11:30,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 06:11:30,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 06:11:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:11:30,030 INFO L87 Difference]: Start difference. First operand 338 states and 339 transitions. Second operand 86 states. [2020-12-23 06:11:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:30,539 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2020-12-23 06:11:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:11:30,540 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 336 [2020-12-23 06:11:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:30,541 INFO L225 Difference]: With dead ends: 352 [2020-12-23 06:11:30,541 INFO L226 Difference]: Without dead ends: 345 [2020-12-23 06:11:30,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:11:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-23 06:11:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-12-23 06:11:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-12-23 06:11:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 343 transitions. [2020-12-23 06:11:30,547 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 343 transitions. Word has length 336 [2020-12-23 06:11:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:30,547 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 343 transitions. [2020-12-23 06:11:30,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 06:11:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 343 transitions. [2020-12-23 06:11:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-12-23 06:11:30,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:30,549 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:30,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:30,750 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 595199827, now seen corresponding path program 82 times [2020-12-23 06:11:30,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:30,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802776300] [2020-12-23 06:11:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:36,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802776300] [2020-12-23 06:11:36,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320276429] [2020-12-23 06:11:36,259 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:36,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:11:36,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:11:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:37,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 06:11:37,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795611561] [2020-12-23 06:11:37,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 06:11:37,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 06:11:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:11:37,473 INFO L87 Difference]: Start difference. First operand 342 states and 343 transitions. Second operand 87 states. [2020-12-23 06:11:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:38,054 INFO L93 Difference]: Finished difference Result 356 states and 358 transitions. [2020-12-23 06:11:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 06:11:38,055 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 340 [2020-12-23 06:11:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:38,057 INFO L225 Difference]: With dead ends: 356 [2020-12-23 06:11:38,057 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 06:11:38,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:11:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 06:11:38,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2020-12-23 06:11:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-12-23 06:11:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2020-12-23 06:11:38,084 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 340 [2020-12-23 06:11:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:38,084 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2020-12-23 06:11:38,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 06:11:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2020-12-23 06:11:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-12-23 06:11:38,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:38,086 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:38,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-12-23 06:11:38,287 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash -144547942, now seen corresponding path program 83 times [2020-12-23 06:11:38,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:38,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322235138] [2020-12-23 06:11:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat