/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/nla-digbench-scaling/cohendiv-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:22:51,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:22:51,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:22:51,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:22:51,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:22:51,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:22:51,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:22:51,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:22:51,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:22:51,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:22:51,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:22:51,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:22:51,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:22:51,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:22:51,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:22:51,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:22:51,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:22:51,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:22:51,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:22:51,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:22:51,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:22:51,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:22:51,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:22:51,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:22:51,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 17:22:51,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 17:22:51,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 17:22:51,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 17:22:51,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 17:22:51,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 17:22:51,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:22:51,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:22:51,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:22:51,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:22:51,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:22:51,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:22:51,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:22:51,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:22:51,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:22:51,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:22:51,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:22:51,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:22:51,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:22:51,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:22:51,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:22:51,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:22:51,397 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:22:51,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:22:51,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:22:51,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:22:51,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:22:51,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:22:51,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:22:51,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:22:51,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:22:51,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:22:51,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:22:51,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:22:51,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:22:51,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:22:51,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:22:51,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:22:51,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:22:51,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:22:51,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:22:51,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:22:51,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:22:51,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:22:51,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:22:51,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:22:51,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:22:51,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:22:51,806 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:22:51,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2021-01-06 17:22:51,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47d528d90/f328aad0ebd64ecd93635cbb06df0ee8/FLAG17e495377 [2021-01-06 17:22:52,450 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:22:52,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2021-01-06 17:22:52,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47d528d90/f328aad0ebd64ecd93635cbb06df0ee8/FLAG17e495377 [2021-01-06 17:22:52,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/47d528d90/f328aad0ebd64ecd93635cbb06df0ee8 [2021-01-06 17:22:52,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:22:52,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:22:52,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:22:52,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:22:52,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:22:52,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:22:52" (1/1) ... [2021-01-06 17:22:52,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee1a18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:52, skipping insertion in model container [2021-01-06 17:22:52,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:22:52" (1/1) ... [2021-01-06 17:22:52,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:22:52,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:22:53,137 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/nla-digbench-scaling/cohendiv-ll_valuebound50.c[576,589] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:22:53,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:22:53,185 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:22:53,203 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/nla-digbench-scaling/cohendiv-ll_valuebound50.c[576,589] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:22:53,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:22:53,251 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:22:53,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53 WrapperNode [2021-01-06 17:22:53,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:22:53,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:22:53,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:22:53,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:22:53,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:22:53,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:22:53,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:22:53,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:22:53,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... [2021-01-06 17:22:53,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:22:53,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:22:53,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:22:53,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:22:53,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:22:53,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:22:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:22:53,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:22:53,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:22:53,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:22:53,894 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-01-06 17:22:53,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:22:53 BoogieIcfgContainer [2021-01-06 17:22:53,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:22:53,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:22:53,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:22:53,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:22:53,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:22:52" (1/3) ... [2021-01-06 17:22:53,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:22:53, skipping insertion in model container [2021-01-06 17:22:53,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:22:53" (2/3) ... [2021-01-06 17:22:53,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:22:53, skipping insertion in model container [2021-01-06 17:22:53,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:22:53" (3/3) ... [2021-01-06 17:22:53,923 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound50.c [2021-01-06 17:22:53,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:22:53,950 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-01-06 17:22:53,997 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-01-06 17:22:54,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:22:54,047 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:22:54,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:22:54,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:22:54,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:22:54,048 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:22:54,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:22:54,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:22:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-01-06 17:22:54,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:22:54,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:54,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:54,082 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-01-06 17:22:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:54,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096728068] [2021-01-06 17:22:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:54,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096728068] [2021-01-06 17:22:54,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:22:54,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:22:54,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870664823] [2021-01-06 17:22:54,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:22:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:54,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:22:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:22:54,368 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2021-01-06 17:22:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:54,400 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-01-06 17:22:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:22:54,402 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:22:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:54,412 INFO L225 Difference]: With dead ends: 83 [2021-01-06 17:22:54,413 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:22:54,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:22:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:22:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 17:22:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:22:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 17:22:54,465 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 11 [2021-01-06 17:22:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:54,466 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 17:22:54,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:22:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 17:22:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:22:54,468 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:54,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:54,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:22:54,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-01-06 17:22:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641547226] [2021-01-06 17:22:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:54,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:54,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582691933] [2021-01-06 17:22:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:22:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:54,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641547226] [2021-01-06 17:22:54,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:54,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582691933] [2021-01-06 17:22:54,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:22:54,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:22:54,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542219090] [2021-01-06 17:22:54,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:22:54,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:54,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:22:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:22:54,819 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 9 states. [2021-01-06 17:22:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:55,147 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 17:22:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:22:55,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 17:22:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:55,149 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:22:55,149 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 17:22:55,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:22:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 17:22:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-01-06 17:22:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:22:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 17:22:55,159 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 11 [2021-01-06 17:22:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:55,160 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 17:22:55,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:22:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 17:22:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:22:55,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:55,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:55,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:22:55,376 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1277171076, now seen corresponding path program 1 times [2021-01-06 17:22:55,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:55,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816576721] [2021-01-06 17:22:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:55,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:55,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168466551] [2021-01-06 17:22:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:22:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:55,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816576721] [2021-01-06 17:22:55,665 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:55,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168466551] [2021-01-06 17:22:55,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:22:55,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-01-06 17:22:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667376285] [2021-01-06 17:22:55,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:22:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:22:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:22:55,668 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2021-01-06 17:22:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:56,178 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-01-06 17:22:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:22:56,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 17:22:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:56,180 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:22:56,180 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:22:56,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:22:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:22:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-01-06 17:22:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:22:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-01-06 17:22:56,191 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 13 [2021-01-06 17:22:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:56,191 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-01-06 17:22:56,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:22:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-01-06 17:22:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:22:56,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:56,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:56,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:56,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 916732292, now seen corresponding path program 1 times [2021-01-06 17:22:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:56,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514411509] [2021-01-06 17:22:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:56,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:56,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635362418] [2021-01-06 17:22:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:22:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:56,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514411509] [2021-01-06 17:22:56,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:56,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635362418] [2021-01-06 17:22:56,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:22:56,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:22:56,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912472932] [2021-01-06 17:22:56,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:22:56,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:22:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:22:56,553 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 5 states. [2021-01-06 17:22:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:56,715 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-01-06 17:22:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:22:56,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 17:22:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:56,718 INFO L225 Difference]: With dead ends: 95 [2021-01-06 17:22:56,719 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 17:22:56,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:22:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 17:22:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-01-06 17:22:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:22:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-01-06 17:22:56,734 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 16 [2021-01-06 17:22:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:56,734 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-01-06 17:22:56,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:22:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-01-06 17:22:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:22:56,735 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:56,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:56,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:56,951 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1552659725, now seen corresponding path program 1 times [2021-01-06 17:22:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:56,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715618138] [2021-01-06 17:22:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:56,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:56,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226057336] [2021-01-06 17:22:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:22:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:57,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715618138] [2021-01-06 17:22:57,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:57,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226057336] [2021-01-06 17:22:57,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:22:57,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:22:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402720508] [2021-01-06 17:22:57,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:22:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:22:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:22:57,153 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 8 states. [2021-01-06 17:22:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:57,474 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-01-06 17:22:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:22:57,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 17:22:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:57,476 INFO L225 Difference]: With dead ends: 129 [2021-01-06 17:22:57,476 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 17:22:57,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:22:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 17:22:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2021-01-06 17:22:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 17:22:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-01-06 17:22:57,492 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 25 [2021-01-06 17:22:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:57,492 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-01-06 17:22:57,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:22:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-01-06 17:22:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:22:57,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:57,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:57,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:57,702 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1755069467, now seen corresponding path program 1 times [2021-01-06 17:22:57,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:57,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046830711] [2021-01-06 17:22:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:57,725 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678885954] [2021-01-06 17:22:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:22:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:57,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046830711] [2021-01-06 17:22:57,957 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:57,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678885954] [2021-01-06 17:22:57,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:22:57,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:22:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107729259] [2021-01-06 17:22:57,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:22:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:22:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:22:57,960 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2021-01-06 17:22:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:58,389 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2021-01-06 17:22:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:22:58,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 17:22:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:58,396 INFO L225 Difference]: With dead ends: 155 [2021-01-06 17:22:58,396 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 17:22:58,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:22:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 17:22:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-01-06 17:22:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 17:22:58,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-01-06 17:22:58,425 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 26 [2021-01-06 17:22:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:58,426 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-01-06 17:22:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:22:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-01-06 17:22:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:22:58,430 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:58,431 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:58,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:22:58,640 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:58,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1828677220, now seen corresponding path program 2 times [2021-01-06 17:22:58,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:58,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745457457] [2021-01-06 17:22:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:58,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:58,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168296651] [2021-01-06 17:22:58,666 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:58,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:22:58,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:22:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:22:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:58,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745457457] [2021-01-06 17:22:58,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:58,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168296651] [2021-01-06 17:22:58,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:22:58,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:22:58,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735392309] [2021-01-06 17:22:58,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:22:58,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:58,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:22:58,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:22:58,882 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 9 states. [2021-01-06 17:22:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:22:59,293 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2021-01-06 17:22:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:22:59,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2021-01-06 17:22:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:22:59,296 INFO L225 Difference]: With dead ends: 163 [2021-01-06 17:22:59,297 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 17:22:59,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:22:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 17:22:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 108. [2021-01-06 17:22:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 17:22:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2021-01-06 17:22:59,314 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 34 [2021-01-06 17:22:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:22:59,314 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2021-01-06 17:22:59,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:22:59,315 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2021-01-06 17:22:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:22:59,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:22:59,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:22:59,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:59,526 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:22:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:22:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash -797667638, now seen corresponding path program 1 times [2021-01-06 17:22:59,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:22:59,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16856534] [2021-01-06 17:22:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:22:59,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:22:59,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436737439] [2021-01-06 17:22:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:22:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:22:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:22:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:22:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:22:59,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16856534] [2021-01-06 17:22:59,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:22:59,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436737439] [2021-01-06 17:22:59,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:22:59,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:22:59,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923132631] [2021-01-06 17:22:59,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:22:59,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:22:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:22:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:22:59,888 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 12 states. [2021-01-06 17:23:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:00,606 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2021-01-06 17:23:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:23:00,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2021-01-06 17:23:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:00,609 INFO L225 Difference]: With dead ends: 173 [2021-01-06 17:23:00,609 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 17:23:00,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:23:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 17:23:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2021-01-06 17:23:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 17:23:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2021-01-06 17:23:00,629 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 35 [2021-01-06 17:23:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:00,629 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2021-01-06 17:23:00,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:23:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2021-01-06 17:23:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:23:00,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:00,631 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:00,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:00,845 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1020421613, now seen corresponding path program 3 times [2021-01-06 17:23:00,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:00,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460368917] [2021-01-06 17:23:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:00,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:00,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520227201] [2021-01-06 17:23:00,875 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:00,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:23:00,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:00,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:23:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:23:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460368917] [2021-01-06 17:23:03,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520227201] [2021-01-06 17:23:03,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:03,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:23:03,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591832043] [2021-01-06 17:23:03,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:23:03,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:03,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:23:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2021-01-06 17:23:03,096 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand 7 states. [2021-01-06 17:23:09,159 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 17 [2021-01-06 17:23:17,222 WARN L197 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-01-06 17:23:21,266 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 17:23:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:48,441 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-01-06 17:23:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:23:48,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-01-06 17:23:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:48,443 INFO L225 Difference]: With dead ends: 146 [2021-01-06 17:23:48,443 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 17:23:48,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=52, Invalid=95, Unknown=9, NotChecked=0, Total=156 [2021-01-06 17:23:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 17:23:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 69. [2021-01-06 17:23:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 17:23:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-01-06 17:23:48,457 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 43 [2021-01-06 17:23:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:48,458 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-01-06 17:23:48,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:23:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-01-06 17:23:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:23:48,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:48,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:48,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:23:48,660 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1074581755, now seen corresponding path program 2 times [2021-01-06 17:23:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:48,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876484056] [2021-01-06 17:23:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:48,674 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:48,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363629144] [2021-01-06 17:23:48,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:48,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:23:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:23:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:49,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:23:49,508 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:23:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:23:49,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876484056] [2021-01-06 17:23:49,559 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:49,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363629144] [2021-01-06 17:23:49,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:49,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 17:23:49,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011519368] [2021-01-06 17:23:49,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:23:49,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:49,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:23:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:23:49,563 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 16 states. [2021-01-06 17:23:50,112 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-01-06 17:23:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:51,289 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-01-06 17:23:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:23:51,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-01-06 17:23:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:51,291 INFO L225 Difference]: With dead ends: 119 [2021-01-06 17:23:51,291 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:23:51,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:23:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:23:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2021-01-06 17:23:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 17:23:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 17:23:51,309 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 44 [2021-01-06 17:23:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:51,309 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 17:23:51,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:23:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 17:23:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 17:23:51,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:51,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:51,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:51,526 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1128629901, now seen corresponding path program 3 times [2021-01-06 17:23:51,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:51,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716774826] [2021-01-06 17:23:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:51,551 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:51,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790976315] [2021-01-06 17:23:51,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:51,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:23:51,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:23:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:23:51,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716774826] [2021-01-06 17:23:51,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:51,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790976315] [2021-01-06 17:23:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:51,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:23:51,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117463535] [2021-01-06 17:23:51,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:23:51,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:23:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:23:51,882 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 10 states. [2021-01-06 17:23:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:56,355 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-01-06 17:23:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:23:56,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2021-01-06 17:23:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:56,357 INFO L225 Difference]: With dead ends: 129 [2021-01-06 17:23:56,357 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:23:56,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:23:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:23:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-01-06 17:23:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 17:23:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-01-06 17:23:56,380 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 48 [2021-01-06 17:23:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:56,380 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-01-06 17:23:56,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:23:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-01-06 17:23:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 17:23:56,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:56,381 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:56,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:56,597 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1934789142, now seen corresponding path program 4 times [2021-01-06 17:23:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:56,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531026849] [2021-01-06 17:23:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:56,612 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:56,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232358549] [2021-01-06 17:23:56,612 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:56,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:23:56,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:56,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:23:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:23:57,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531026849] [2021-01-06 17:23:57,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:57,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232358549] [2021-01-06 17:23:57,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:57,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:23:57,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713356212] [2021-01-06 17:23:57,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:23:57,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:57,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:23:57,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:23:57,169 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 15 states. [2021-01-06 17:23:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:58,471 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2021-01-06 17:23:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:23:58,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2021-01-06 17:23:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:58,474 INFO L225 Difference]: With dead ends: 137 [2021-01-06 17:23:58,474 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 17:23:58,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:23:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 17:23:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-01-06 17:23:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 17:23:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-01-06 17:23:58,495 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 53 [2021-01-06 17:23:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:58,496 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-01-06 17:23:58,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:23:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-01-06 17:23:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 17:23:58,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:58,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:58,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:23:58,711 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash -413997928, now seen corresponding path program 5 times [2021-01-06 17:23:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:58,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598751804] [2021-01-06 17:23:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:58,735 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:58,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260091216] [2021-01-06 17:23:58,736 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:58,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:23:58,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:23:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:23:58,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598751804] [2021-01-06 17:23:58,981 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:58,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260091216] [2021-01-06 17:23:58,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:58,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:23:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38704898] [2021-01-06 17:23:58,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:23:58,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:23:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:23:58,984 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 7 states. [2021-01-06 17:23:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:23:59,178 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2021-01-06 17:23:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:23:59,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2021-01-06 17:23:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:23:59,180 INFO L225 Difference]: With dead ends: 186 [2021-01-06 17:23:59,180 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 17:23:59,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:23:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 17:23:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2021-01-06 17:23:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 17:23:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-01-06 17:23:59,211 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 57 [2021-01-06 17:23:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:23:59,211 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-01-06 17:23:59,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:23:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-01-06 17:23:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 17:23:59,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:23:59,212 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:23:59,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:23:59,426 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:23:59,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:23:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1860833829, now seen corresponding path program 6 times [2021-01-06 17:23:59,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:23:59,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300755729] [2021-01-06 17:23:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:23:59,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:23:59,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281001765] [2021-01-06 17:23:59,441 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:23:59,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:23:59,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:23:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:23:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:23:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-01-06 17:23:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300755729] [2021-01-06 17:23:59,667 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:23:59,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281001765] [2021-01-06 17:23:59,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:23:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:23:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045933108] [2021-01-06 17:23:59,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:23:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:23:59,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:23:59,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:23:59,670 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand 8 states. [2021-01-06 17:24:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:24:03,939 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2021-01-06 17:24:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:24:03,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2021-01-06 17:24:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:24:03,941 INFO L225 Difference]: With dead ends: 171 [2021-01-06 17:24:03,942 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 17:24:03,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:24:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 17:24:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 139. [2021-01-06 17:24:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 17:24:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2021-01-06 17:24:03,988 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 62 [2021-01-06 17:24:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:24:03,989 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2021-01-06 17:24:03,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:24:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2021-01-06 17:24:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:24:03,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:24:03,990 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:24:04,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:24:04,204 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:24:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:24:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 300678153, now seen corresponding path program 7 times [2021-01-06 17:24:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:24:04,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993368713] [2021-01-06 17:24:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:24:04,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:24:04,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017453560] [2021-01-06 17:24:04,227 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:24:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:24:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:24:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:24:05,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993368713] [2021-01-06 17:24:05,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:24:05,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017453560] [2021-01-06 17:24:05,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:24:05,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:24:05,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:24:05,356 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:24:05,356 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:24:05,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:24:05,607 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:24:05,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:24:05 BoogieIcfgContainer [2021-01-06 17:24:05,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:24:05,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:24:05,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:24:05,609 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:24:05,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:22:53" (3/4) ... [2021-01-06 17:24:05,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:24:05,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:24:05,617 INFO L168 Benchmark]: Toolchain (without parser) took 72747.31 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.8 MB in the beginning and 190.5 MB in the end (delta: -63.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,618 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:24:05,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.42 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,622 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,622 INFO L168 Benchmark]: Boogie Preprocessor took 53.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,627 INFO L168 Benchmark]: RCFGBuilder took 532.94 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 96.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,630 INFO L168 Benchmark]: TraceAbstraction took 71705.37 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 96.4 MB in the beginning and 191.0 MB in the end (delta: -94.7 MB). Peak memory consumption was 89.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,631 INFO L168 Benchmark]: Witness Printer took 7.10 ms. Allocated memory is still 218.1 MB. Free memory was 191.0 MB in the beginning and 190.5 MB in the end (delta: 526.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:24:05,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 377.42 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 532.94 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 96.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 71705.37 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 96.4 MB in the beginning and 191.0 MB in the end (delta: -94.7 MB). Peak memory consumption was 89.9 MB. Max. memory is 8.0 GB. * Witness Printer took 7.10 ms. Allocated memory is still 218.1 MB. Free memory was 191.0 MB in the beginning and 190.5 MB in the end (delta: 526.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] int x, y; [L24] long long q, r, a, b; [L26] x = __VERIFIER_nondet_int() [L12] COND FALSE !(!cond) [L28] y = __VERIFIER_nondet_int() [L12] COND FALSE !(!cond) [L12] COND FALSE !(!cond) [L33] q = 0 [L34] r = x [L35] a = 0 [L36] b = 0 [L38] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L42] COND FALSE !(!(r >= y)) [L44] a = 1 [L45] b = y [L47] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L52] COND FALSE !(!(r >= 2 * b)) [L15] COND FALSE !(!(cond)) [L57] a = 2 * a [L58] b = 2 * b [L47] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L52] COND FALSE !(!(r >= 2 * b)) [L15] COND FALSE !(!(cond)) [L57] a = 2 * a [L58] b = 2 * b [L47] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L52] COND TRUE !(r >= 2 * b) [L60] r = r - b [L61] q = q + a [L38] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L42] COND FALSE !(!(r >= y)) [L44] a = 1 [L45] b = y [L47] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L52] COND FALSE !(!(r >= 2 * b)) [L15] COND FALSE !(!(cond)) [L57] a = 2 * a [L58] b = 2 * b [L47] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L52] COND TRUE !(r >= 2 * b) [L60] r = r - b [L61] q = q + a [L38] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 71.5s, OverallIterations: 15, TraceHistogramMax: 5, AutomataDifference: 60.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 378 SDtfs, 1752 SDslu, 862 SDs, 0 SdLazy, 1967 SolverSat, 528 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 23.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 365 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 39.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 344 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 478 NumberOfCodeBlocks, 404 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 464 ConstructedInterpolants, 0 QuantifiedInterpolants, 178597 SizeOfPredicates, 136 NumberOfNonLiveVariables, 1510 ConjunctsInSsa, 360 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 184/321 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...