/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/bresenham-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:16:59,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:16:59,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:16:59,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:16:59,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:16:59,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:16:59,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:16:59,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:16:59,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:16:59,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:16:59,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:16:59,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:16:59,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:16:59,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:16:59,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:16:59,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:16:59,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:16:59,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:16:59,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:16:59,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:16:59,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:16:59,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:16:59,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:16:59,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:16:59,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:16:59,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:16:59,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:16:59,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:16:59,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:16:59,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:16:59,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:16:59,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:16:59,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:16:59,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:16:59,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:16:59,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:16:59,452 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 07:16:59,479 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:16:59,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:16:59,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:16:59,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:16:59,482 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:16:59,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:16:59,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:16:59,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:16:59,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:16:59,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:16:59,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:16:59,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:16:59,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:16:59,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:16:59,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:16:59,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:16:59,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:16:59,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:16:59,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:16:59,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:16:59,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:16:59,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:16:59,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:16:59,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:16:59,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:16:59,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:16:59,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:16:59,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:16:59,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:16:59,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:16:59,960 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:16:59,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/bresenham-ll.c [2020-12-23 07:17:00,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c4a099fe9/9edea79cc1c2427ea2a507d506b48d92/FLAG31dbecb07 [2020-12-23 07:17:00,661 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:17:00,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/bresenham-ll.c [2020-12-23 07:17:00,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c4a099fe9/9edea79cc1c2427ea2a507d506b48d92/FLAG31dbecb07 [2020-12-23 07:17:01,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c4a099fe9/9edea79cc1c2427ea2a507d506b48d92 [2020-12-23 07:17:01,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:17:01,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:17:01,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:17:01,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:17:01,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:17:01,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716d1496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01, skipping insertion in model container [2020-12-23 07:17:01,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:17:01,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:17:01,273 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/bresenham-ll.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2020-12-23 07:17:01,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:17:01,304 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:17:01,318 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/bresenham-ll.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2020-12-23 07:17:01,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:17:01,344 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:17:01,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01 WrapperNode [2020-12-23 07:17:01,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:17:01,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:17:01,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:17:01,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:17:01,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:17:01,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:17:01,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:17:01,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:17:01,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (1/1) ... [2020-12-23 07:17:01,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:17:01,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:17:01,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:17:01,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:17:01,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (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 07:17:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:17:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:17:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:17:01,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:17:01,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:17:01,873 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:17:01,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:17:01 BoogieIcfgContainer [2020-12-23 07:17:01,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:17:01,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:17:01,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:17:01,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:17:01,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:17:01" (1/3) ... [2020-12-23 07:17:01,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ab5cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:17:01, skipping insertion in model container [2020-12-23 07:17:01,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:17:01" (2/3) ... [2020-12-23 07:17:01,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ab5cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:17:01, skipping insertion in model container [2020-12-23 07:17:01,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:17:01" (3/3) ... [2020-12-23 07:17:01,884 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2020-12-23 07:17:01,892 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:17:01,898 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:17:01,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:17:02,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:17:02,025 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:17:02,025 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:17:02,025 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:17:02,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:17:02,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:17:02,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:17:02,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:17:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 07:17:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 07:17:02,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:02,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 07:17:02,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-12-23 07:17:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:02,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630114822] [2020-12-23 07:17:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:02,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:02,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436330807] [2020-12-23 07:17:02,183 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 07:17:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:17:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:02,381 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 07:17:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630114822] [2020-12-23 07:17:02,382 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436330807] [2020-12-23 07:17:02,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:17:02,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:17:02,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592179440] [2020-12-23 07:17:02,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:17:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:17:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:17:02,407 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-12-23 07:17:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:02,529 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2020-12-23 07:17:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:17:02,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-23 07:17:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:02,541 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:17:02,541 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:17:02,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:17:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:17:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-23 07:17:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:17:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 07:17:02,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 5 [2020-12-23 07:17:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:02,581 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 07:17:02,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:17:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 07:17:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:17:02,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:02,582 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:02,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:17:02,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1328986426, now seen corresponding path program 1 times [2020-12-23 07:17:02,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:02,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266005356] [2020-12-23 07:17:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:02,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:02,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393212528] [2020-12-23 07:17:02,826 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 07:17:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:02,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:17:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:03,039 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 07:17:03,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266005356] [2020-12-23 07:17:03,039 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393212528] [2020-12-23 07:17:03,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:03,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:17:03,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149486131] [2020-12-23 07:17:03,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:17:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:17:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:17:03,044 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-12-23 07:17:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:03,179 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-23 07:17:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:17:03,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 07:17:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:03,181 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:17:03,181 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:17:03,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:17:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:17:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-12-23 07:17:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:17:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 07:17:03,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-12-23 07:17:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:03,193 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 07:17:03,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:17:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 07:17:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:17:03,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:03,194 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:03,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:03,409 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:03,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1330833468, now seen corresponding path program 1 times [2020-12-23 07:17:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:03,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971525663] [2020-12-23 07:17:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:03,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:03,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137442223] [2020-12-23 07:17:03,434 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 07:17:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:17:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:03,683 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 07:17:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971525663] [2020-12-23 07:17:03,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137442223] [2020-12-23 07:17:03,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:03,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:17:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053905907] [2020-12-23 07:17:03,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:17:03,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:17:03,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:17:03,695 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-12-23 07:17:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:03,834 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 07:17:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:17:03,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-23 07:17:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:03,836 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:17:03,837 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:17:03,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:17:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:17:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-23 07:17:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:17:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 07:17:03,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-23 07:17:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:03,843 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 07:17:03,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:17:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 07:17:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:17:03,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:03,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:04,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:04,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 21628584, now seen corresponding path program 1 times [2020-12-23 07:17:04,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:04,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365754610] [2020-12-23 07:17:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:04,091 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:04,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515880949] [2020-12-23 07:17:04,092 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 07:17:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:04,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:17:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:04,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:17:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365754610] [2020-12-23 07:17:04,514 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515880949] [2020-12-23 07:17:04,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:04,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:17:04,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249946175] [2020-12-23 07:17:04,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:17:04,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:17:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:17:04,525 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2020-12-23 07:17:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:04,793 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:17:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:17:04,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 07:17:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:04,795 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:17:04,795 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:17:04,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:17:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:17:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-23 07:17:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:17:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 07:17:04,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-12-23 07:17:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:04,801 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 07:17:04,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:17:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 07:17:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:17:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:04,802 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 07:17:05,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:05,007 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:05,009 INFO L82 PathProgramCache]: Analyzing trace with hash -247107990, now seen corresponding path program 2 times [2020-12-23 07:17:05,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:05,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289703192] [2020-12-23 07:17:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:05,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:05,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966648754] [2020-12-23 07:17:05,023 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 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 07:17:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:17:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:05,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289703192] [2020-12-23 07:17:05,279 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:05,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966648754] [2020-12-23 07:17:05,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:05,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:17:05,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088967524] [2020-12-23 07:17:05,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:17:05,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:17:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:17:05,282 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-12-23 07:17:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:05,532 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-23 07:17:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:17:05,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:17:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:05,533 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:17:05,534 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:17:05,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:17:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:17:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-23 07:17:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:17:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 07:17:05,540 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-12-23 07:17:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:05,541 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 07:17:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:17:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 07:17:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:17:05,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:05,542 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:05,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:05,757 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:05,758 INFO L82 PathProgramCache]: Analyzing trace with hash -245260948, now seen corresponding path program 1 times [2020-12-23 07:17:05,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:05,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002615417] [2020-12-23 07:17:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:05,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:05,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148219670] [2020-12-23 07:17:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:17:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:05,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:17:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002615417] [2020-12-23 07:17:06,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:06,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148219670] [2020-12-23 07:17:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:06,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:17:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143587420] [2020-12-23 07:17:06,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:17:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:17:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:17:06,013 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2020-12-23 07:17:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:06,223 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 07:17:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:17:06,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 07:17:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:06,225 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:17:06,225 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:17:06,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:17:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:17:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-12-23 07:17:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:17:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 07:17:06,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 15 [2020-12-23 07:17:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:06,233 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 07:17:06,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:17:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 07:17:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:17:06,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:06,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:06,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:06,450 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -640135000, now seen corresponding path program 2 times [2020-12-23 07:17:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:06,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817443257] [2020-12-23 07:17:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:06,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:06,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583451389] [2020-12-23 07:17:06,466 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 07:17:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:06,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:17:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817443257] [2020-12-23 07:17:06,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583451389] [2020-12-23 07:17:06,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:06,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:17:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495875030] [2020-12-23 07:17:06,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:17:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:17:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:17:06,871 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 13 states. [2020-12-23 07:17:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:07,297 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-12-23 07:17:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:17:07,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 07:17:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:07,301 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:17:07,301 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 07:17:07,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:17:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 07:17:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-12-23 07:17:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:17:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-12-23 07:17:07,311 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 15 [2020-12-23 07:17:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:07,311 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-12-23 07:17:07,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:17:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-12-23 07:17:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:17:07,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:07,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 07:17:07,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:07,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash -638287958, now seen corresponding path program 2 times [2020-12-23 07:17:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:07,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437187695] [2020-12-23 07:17:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:07,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:07,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922926087] [2020-12-23 07:17:07,544 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 07:17:07,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:17:07,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:17:07,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:17:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:07,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437187695] [2020-12-23 07:17:07,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:07,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922926087] [2020-12-23 07:17:07,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:07,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:17:07,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682347575] [2020-12-23 07:17:07,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:17:07,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:17:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:17:07,844 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 11 states. [2020-12-23 07:17:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:08,118 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-12-23 07:17:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:17:08,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 07:17:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:08,121 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:17:08,121 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:17:08,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:17:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:17:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-12-23 07:17:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:17:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-23 07:17:08,131 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 15 [2020-12-23 07:17:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:08,131 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-23 07:17:08,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:17:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-23 07:17:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:17:08,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:08,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:08,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 07:17:08,347 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -602097988, now seen corresponding path program 1 times [2020-12-23 07:17:08,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:08,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843564604] [2020-12-23 07:17:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:08,360 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489441956] [2020-12-23 07:17:08,360 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 07:17:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:17:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:17:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:17:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:17:08,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843564604] [2020-12-23 07:17:08,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:17:08,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489441956] [2020-12-23 07:17:08,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:17:08,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:17:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072632619] [2020-12-23 07:17:08,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:17:08,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:17:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:17:08,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:17:08,581 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2020-12-23 07:17:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:17:08,696 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-23 07:17:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:17:08,697 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 07:17:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:17:08,698 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:17:08,698 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:17:08,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:17:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:17:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-23 07:17:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:17:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-23 07:17:08,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2020-12-23 07:17:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:17:08,707 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-23 07:17:08,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:17:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-23 07:17:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:17:08,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:17:08,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:17:08,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:17:08,923 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:17:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:17:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1411444614, now seen corresponding path program 2 times [2020-12-23 07:17:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:17:08,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131581940] [2020-12-23 07:17:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:17:08,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:17:08,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037225899] [2020-12-23 07:17:08,936 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