/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/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:30:11,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:30:11,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:30:11,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:30:11,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:30:11,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:30:11,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:30:11,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:30:11,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:30:11,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:30:11,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:30:11,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:30:11,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:30:11,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:30:11,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:30:11,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:30:11,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:30:11,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:30:11,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:30:11,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:30:11,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:30:11,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:30:11,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:30:11,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:30:11,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:30:11,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:30:11,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:30:11,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:30:11,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:30:11,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:30:11,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:30:11,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:30:11,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:30:11,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:30:11,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:30:11,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:30:11,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:30:11,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:30:11,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:30:11,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:30:11,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:30:11,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:30:11,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:30:11,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:30:11,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:30:11,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:30:11,502 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:30:11,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:30:11,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:30:11,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:30:11,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:30:11,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:30:11,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:30:11,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:30:11,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:30:11,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:30:11,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:30:11,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:30:11,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:30:11,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:30:11,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:30:11,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:30:11,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:30:11,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:30:11,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:30:11,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:30:11,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:30:11,985 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:30:11,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2020-12-23 07:30:12,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2e30bec/6e511bb064274cf18d733d35a3c1863d/FLAGe571b0f3c [2020-12-23 07:30:12,583 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:30:12,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2020-12-23 07:30:12,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2e30bec/6e511bb064274cf18d733d35a3c1863d/FLAGe571b0f3c [2020-12-23 07:30:12,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ab2e30bec/6e511bb064274cf18d733d35a3c1863d [2020-12-23 07:30:12,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:30:12,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:30:12,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:30:12,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:30:12,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:30:12,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:30:12" (1/1) ... [2020-12-23 07:30:12,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10038c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:12, skipping insertion in model container [2020-12-23 07:30:12,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:30:12" (1/1) ... [2020-12-23 07:30:12,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:30:13,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:30:13,237 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/dijkstra-u_valuebound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~p~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[~h~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~h~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:30:13,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:30:13,318 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:30:13,334 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/dijkstra-u_valuebound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~p~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[~h~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~h~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:30:13,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:30:13,400 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:30:13,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13 WrapperNode [2020-12-23 07:30:13,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:30:13,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:30:13,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:30:13,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:30:13,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:30:13,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:30:13,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:30:13,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:30:13,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... [2020-12-23 07:30:13,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:30:13,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:30:13,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:30:13,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:30:13,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:30:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:30:13,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:30:13,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:30:13,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:30:16,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:30:16,100 INFO L299 CfgBuilder]: Removed 28 assume(true) statements. [2020-12-23 07:30:16,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:30:16 BoogieIcfgContainer [2020-12-23 07:30:16,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:30:16,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:30:16,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:30:16,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:30:16,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:30:12" (1/3) ... [2020-12-23 07:30:16,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68da4aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:30:16, skipping insertion in model container [2020-12-23 07:30:16,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:30:13" (2/3) ... [2020-12-23 07:30:16,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68da4aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:30:16, skipping insertion in model container [2020-12-23 07:30:16,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:30:16" (3/3) ... [2020-12-23 07:30:16,110 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2020-12-23 07:30:16,117 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:30:16,125 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-23 07:30:16,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-23 07:30:16,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:30:16,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:30:16,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:30:16,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:30:16,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:30:16,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:30:16,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:30:16,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:30:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-23 07:30:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:30:16,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:30:16,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:30:16,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:30:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:30:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1235857098, now seen corresponding path program 1 times [2020-12-23 07:30:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:30:16,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473995353] [2020-12-23 07:30:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:30:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:30:16,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473995353] [2020-12-23 07:30:16,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:30:16,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:30:16,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218705986] [2020-12-23 07:30:16,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:30:16,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:30:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:30:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:30:16,404 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2020-12-23 07:30:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:30:16,429 INFO L93 Difference]: Finished difference Result 97 states and 130 transitions. [2020-12-23 07:30:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:30:16,431 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 07:30:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:30:16,441 INFO L225 Difference]: With dead ends: 97 [2020-12-23 07:30:16,441 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 07:30:16,445 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 [2020-12-23 07:30:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 07:30:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 07:30:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 07:30:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-23 07:30:16,489 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 10 [2020-12-23 07:30:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:30:16,490 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-23 07:30:16,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:30:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-23 07:30:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:30:16,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:30:16,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:30:16,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:30:16,492 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:30:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:30:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1503620767, now seen corresponding path program 1 times [2020-12-23 07:30:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:30:16,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533560385] [2020-12-23 07:30:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:30:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:30:16,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533560385] [2020-12-23 07:30:16,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:30:16,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:30:16,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100802656] [2020-12-23 07:30:16,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:30:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:30:16,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:30:16,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:30:16,846 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 5 states. [2020-12-23 07:30:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:30:31,886 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-12-23 07:30:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:30:31,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 07:30:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:30:31,889 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:30:31,889 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:30:31,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:30:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:30:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-12-23 07:30:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 07:30:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-12-23 07:30:31,905 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 11 [2020-12-23 07:30:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:30:31,905 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-12-23 07:30:31,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:30:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-12-23 07:30:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:30:31,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:30:31,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:30:31,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:30:31,907 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:30:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:30:31,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1828543716, now seen corresponding path program 1 times [2020-12-23 07:30:31,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:30:31,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82558016] [2020-12-23 07:30:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:30:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:30:32,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82558016] [2020-12-23 07:30:32,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983837588] [2020-12-23 07:30:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:30:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:30:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:30:32,322 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:30:32,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:30:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:30:32,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:30:32,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 07:30:32,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690079063] [2020-12-23 07:30:32,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:30:32,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:30:32,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:30:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:30:32,390 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 9 states. [2020-12-23 07:30:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:30:53,575 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2020-12-23 07:30:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:30:53,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 07:30:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:30:53,578 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:30:53,578 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 07:30:53,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:30:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 07:30:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2020-12-23 07:30:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:30:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-12-23 07:30:53,600 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 13 [2020-12-23 07:30:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:30:53,600 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-12-23 07:30:53,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:30:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-12-23 07:30:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:30:53,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:30:53,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:30:53,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 07:30:53,815 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:30:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:30:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2147482631, now seen corresponding path program 1 times [2020-12-23 07:30:53,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:30:53,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478774487] [2020-12-23 07:30:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:30:53,834 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:30:53,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972809448] [2020-12-23 07:30:53,835 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 [2020-12-23 07:30:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:30:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:30:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:30:54,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478774487] [2020-12-23 07:30:54,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:30:54,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972809448] [2020-12-23 07:30:54,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:30:54,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:30:54,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651688404] [2020-12-23 07:30:54,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:30:54,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:30:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:30:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:30:54,004 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 6 states. [2020-12-23 07:30:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:30:58,670 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-12-23 07:30:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:30:58,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:30:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:30:58,673 INFO L225 Difference]: With dead ends: 120 [2020-12-23 07:30:58,673 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 07:30:58,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:30:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 07:30:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-23 07:30:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:30:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-12-23 07:30:58,690 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 15 [2020-12-23 07:30:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:30:58,690 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-12-23 07:30:58,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:30:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-12-23 07:30:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:30:58,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:30:58,691 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:30:58,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:30:58,905 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:30:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:30:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1165801538, now seen corresponding path program 1 times [2020-12-23 07:30:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:30:58,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994085371] [2020-12-23 07:30:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:30:58,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:30:58,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626029455] [2020-12-23 07:30:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:30:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:30:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:30:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:30:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:30:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994085371] [2020-12-23 07:30:59,120 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:30:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626029455] [2020-12-23 07:30:59,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:30:59,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:30:59,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478264885] [2020-12-23 07:30:59,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:30:59,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:30:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:30:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:30:59,122 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 6 states. [2020-12-23 07:31:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:01,648 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-23 07:31:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:31:01,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 07:31:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:01,649 INFO L225 Difference]: With dead ends: 103 [2020-12-23 07:31:01,650 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 07:31:01,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:31:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 07:31:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-12-23 07:31:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:31:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-12-23 07:31:01,665 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 17 [2020-12-23 07:31:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:01,665 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-12-23 07:31:01,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:31:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-12-23 07:31:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:31:01,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:01,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:01,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:01,875 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash -957581047, now seen corresponding path program 1 times [2020-12-23 07:31:01,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:01,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593927864] [2020-12-23 07:31:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:01,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:01,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268159498] [2020-12-23 07:31:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:31:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:02,322 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:31:02,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:31:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593927864] [2020-12-23 07:31:02,382 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268159498] [2020-12-23 07:31:02,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:02,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:31:02,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663987911] [2020-12-23 07:31:02,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:31:02,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:31:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:31:02,388 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 9 states. [2020-12-23 07:31:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:15,447 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-12-23 07:31:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:31:15,448 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 07:31:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:15,449 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:31:15,449 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 07:31:15,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:31:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 07:31:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-12-23 07:31:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:31:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-12-23 07:31:15,460 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 27 [2020-12-23 07:31:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:15,461 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-12-23 07:31:15,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:31:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-12-23 07:31:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:31:15,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:15,462 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:15,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:15,664 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -639001454, now seen corresponding path program 1 times [2020-12-23 07:31:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:15,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164940187] [2020-12-23 07:31:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:15,680 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:15,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647424363] [2020-12-23 07:31:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:31:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164940187] [2020-12-23 07:31:15,773 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647424363] [2020-12-23 07:31:15,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:15,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:31:15,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787484458] [2020-12-23 07:31:15,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:31:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:31:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:31:15,776 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 5 states. [2020-12-23 07:31:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:20,095 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2020-12-23 07:31:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:31:20,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-12-23 07:31:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:20,097 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:31:20,097 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 07:31:20,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:31:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 07:31:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-12-23 07:31:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:31:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2020-12-23 07:31:20,111 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 28 [2020-12-23 07:31:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:20,111 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2020-12-23 07:31:20,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:31:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2020-12-23 07:31:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:31:20,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:20,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:20,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 07:31:20,328 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1112228340, now seen corresponding path program 1 times [2020-12-23 07:31:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:20,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917811480] [2020-12-23 07:31:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:20,343 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:20,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910369928] [2020-12-23 07:31:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:31:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:31:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:21,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917811480] [2020-12-23 07:31:21,062 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:21,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910369928] [2020-12-23 07:31:21,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:21,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:31:21,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077832563] [2020-12-23 07:31:21,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:31:21,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:31:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:31:21,064 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand 10 states. [2020-12-23 07:31:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:35,117 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-12-23 07:31:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:31:35,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-23 07:31:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:35,119 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:31:35,119 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 07:31:35,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:31:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 07:31:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-12-23 07:31:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:31:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-12-23 07:31:35,136 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 29 [2020-12-23 07:31:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:35,137 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-12-23 07:31:35,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:31:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-12-23 07:31:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:31:35,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:35,138 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:35,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:35,340 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1667347652, now seen corresponding path program 2 times [2020-12-23 07:31:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:35,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403641483] [2020-12-23 07:31:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:35,358 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:35,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388914091] [2020-12-23 07:31:35,359 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:35,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:31:35,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:31:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:31:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:35,723 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:31:35,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 07:31:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:31:35,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403641483] [2020-12-23 07:31:35,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:35,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388914091] [2020-12-23 07:31:35,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:31:35,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:31:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060484306] [2020-12-23 07:31:35,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:31:35,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:31:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:31:35,778 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 9 states. [2020-12-23 07:31:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:31:47,007 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2020-12-23 07:31:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:31:47,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-23 07:31:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:31:47,015 INFO L225 Difference]: With dead ends: 173 [2020-12-23 07:31:47,015 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 07:31:47,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:31:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 07:31:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2020-12-23 07:31:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:31:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2020-12-23 07:31:47,029 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 29 [2020-12-23 07:31:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:31:47,030 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2020-12-23 07:31:47,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:31:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2020-12-23 07:31:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:31:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:31:47,033 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:31:47,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:47,237 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:31:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:31:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash -870590409, now seen corresponding path program 2 times [2020-12-23 07:31:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:31:47,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680740239] [2020-12-23 07:31:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:31:47,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:31:47,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451419788] [2020-12-23 07:31:47,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:31:47,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:31:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:31:47,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:31:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:31:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:31:47,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680740239] [2020-12-23 07:31:47,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:31:47,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451419788] [2020-12-23 07:31:47,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:31:47,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:31:47,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016495724] [2020-12-23 07:31:47,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:31:47,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:31:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:31:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:31:47,632 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 8 states. [2020-12-23 07:32:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:07,108 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2020-12-23 07:32:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:32:07,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-12-23 07:32:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:07,110 INFO L225 Difference]: With dead ends: 140 [2020-12-23 07:32:07,110 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:32:07,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:32:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:32:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2020-12-23 07:32:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 07:32:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-12-23 07:32:07,121 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 30 [2020-12-23 07:32:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:07,121 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-12-23 07:32:07,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:32:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-12-23 07:32:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:32:07,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:07,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:07,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:32:07,327 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 595578799, now seen corresponding path program 1 times [2020-12-23 07:32:07,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:07,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494132115] [2020-12-23 07:32:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:07,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:07,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446933176] [2020-12-23 07:32:07,340 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:32:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:32:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:32:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494132115] [2020-12-23 07:32:08,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446933176] [2020-12-23 07:32:08,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:08,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:32:08,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498316254] [2020-12-23 07:32:08,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:32:08,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:32:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:32:08,048 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 10 states. [2020-12-23 07:32:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:21,742 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2020-12-23 07:32:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:32:21,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-23 07:32:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:21,744 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:32:21,745 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 07:32:21,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:32:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 07:32:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-12-23 07:32:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:32:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2020-12-23 07:32:21,755 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 31 [2020-12-23 07:32:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:21,755 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2020-12-23 07:32:21,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:32:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2020-12-23 07:32:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:32:21,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:21,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:21,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:21,961 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash 298448647, now seen corresponding path program 2 times [2020-12-23 07:32:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:21,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607951597] [2020-12-23 07:32:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:21,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:21,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514668958] [2020-12-23 07:32:21,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:32:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:38,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:32:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:32:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607951597] [2020-12-23 07:32:38,939 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:32:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514668958] [2020-12-23 07:32:38,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:32:38,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:32:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438155422] [2020-12-23 07:32:38,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:32:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:32:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:32:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:32:38,941 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand 12 states. [2020-12-23 07:32:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:32:46,365 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2020-12-23 07:32:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:32:46,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-23 07:32:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:32:46,367 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:32:46,367 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 07:32:46,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:32:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 07:32:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-12-23 07:32:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 07:32:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2020-12-23 07:32:46,379 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 31 [2020-12-23 07:32:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:32:46,379 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2020-12-23 07:32:46,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:32:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2020-12-23 07:32:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:32:46,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:32:46,380 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:32:46,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:46,581 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:32:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:32:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1216942657, now seen corresponding path program 3 times [2020-12-23 07:32:46,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:32:46,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687118282] [2020-12-23 07:32:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:32:46,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:32:46,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102737359] [2020-12-23 07:32:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:32:46,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:32:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:32:46,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:32:46,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:32:47,067 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:47,331 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:47,809 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:48,641 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:49,819 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:51,330 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:53,137 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:56,393 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:32:59,925 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:03,672 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:07,918 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:12,669 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:17,937 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:24,368 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:32,563 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:41,692 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:51,725 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:02,809 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:16,025 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:31,899 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.