/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/bresenham-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:21:53,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:21:53,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:21:53,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:21:53,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:21:53,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:21:53,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:21:53,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:21:53,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:21:53,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:21:53,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:21:53,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:21:53,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:21:53,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:21:53,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:21:53,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:21:53,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:21:53,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:21:53,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:21:53,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:21:53,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:21:53,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:21:53,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:21:53,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:21:53,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:21:53,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:21:53,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:21:53,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:21:53,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:21:53,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:21:53,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:21:53,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:21:53,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:21:53,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:21:53,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:21:53,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:21:53,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:21:53,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:21:53,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:21:53,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:21:53,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:21:53,710 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 07:21:53,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:21:53,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:21:53,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:21:53,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:21:53,751 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:21:53,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:21:53,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:21:53,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:21:53,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:21:53,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:21:53,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:21:53,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:21:53,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:21:53,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:21:53,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:21:53,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:21:53,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:21:53,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:21:53,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:21:53,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:21:53,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:21:53,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:21:53,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:21:53,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:21:53,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:21:53,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:21:54,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:21:54,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:21:54,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:21:54,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:21:54,204 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:21:54,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2020-12-23 07:21:54,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d964ca14/58ef96c208b844fa912c839f45a5fc0b/FLAG84ec0a17d [2020-12-23 07:21:54,999 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:21:55,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2020-12-23 07:21:55,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d964ca14/58ef96c208b844fa912c839f45a5fc0b/FLAG84ec0a17d [2020-12-23 07:21:55,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4d964ca14/58ef96c208b844fa912c839f45a5fc0b [2020-12-23 07:21:55,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:21:55,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:21:55,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:21:55,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:21:55,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:21:55,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1ee4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55, skipping insertion in model container [2020-12-23 07:21:55,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:21:55,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:21:55,616 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/bresenham-ll_unwindbound50.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 07:21:55,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:21:55,654 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:21:55,668 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/bresenham-ll_unwindbound50.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 07:21:55,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:21:55,694 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:21:55,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55 WrapperNode [2020-12-23 07:21:55,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:21:55,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:21:55,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:21:55,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:21:55,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:21:55,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:21:55,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:21:55,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:21:55,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (1/1) ... [2020-12-23 07:21:55,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:21:55,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:21:55,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:21:55,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:21:55,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (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 07:21:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:21:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:21:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:21:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:21:56,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:21:56,119 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:21:56,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:56 BoogieIcfgContainer [2020-12-23 07:21:56,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:21:56,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:21:56,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:21:56,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:21:56,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:21:55" (1/3) ... [2020-12-23 07:21:56,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3f4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:21:56, skipping insertion in model container [2020-12-23 07:21:56,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:21:55" (2/3) ... [2020-12-23 07:21:56,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd3f4ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:21:56, skipping insertion in model container [2020-12-23 07:21:56,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:56" (3/3) ... [2020-12-23 07:21:56,148 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.c [2020-12-23 07:21:56,154 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:21:56,158 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:21:56,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:21:56,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:21:56,237 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:21:56,237 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:21:56,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:21:56,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:21:56,238 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:21:56,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:21:56,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:21:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-23 07:21:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:21:56,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:56,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:21:56,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2020-12-23 07:21:56,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:56,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755674015] [2020-12-23 07:21:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:56,434 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 07:21:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755674015] [2020-12-23 07:21:56,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:56,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:21:56,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718368004] [2020-12-23 07:21:56,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:21:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:21:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:21:56,461 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-23 07:21:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:56,479 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-23 07:21:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:21:56,480 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 07:21:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:56,490 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:21:56,490 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 07:21:56,493 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 07:21:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 07:21:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 07:21:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:21:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 07:21:56,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-23 07:21:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:56,532 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 07:21:56,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:21:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 07:21:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:21:56,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:56,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:21:56,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:21:56,534 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 07:21:56,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:56,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273179874] [2020-12-23 07:21:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:56,556 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:56,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815458179] [2020-12-23 07:21:56,556 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 07:21:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:56,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:21:56,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:56,719 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 07:21:56,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273179874] [2020-12-23 07:21:56,720 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:56,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815458179] [2020-12-23 07:21:56,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:21:56,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:21:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858241202] [2020-12-23 07:21:56,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:21:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:21:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:21:56,724 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2020-12-23 07:21:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:56,800 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-23 07:21:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:21:56,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:21:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:56,802 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:21:56,802 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:21:56,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:21:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:21:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-12-23 07:21:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:21:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 07:21:56,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-12-23 07:21:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:56,810 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 07:21:56,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:21:56,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 07:21:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:21:56,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:56,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:57,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:21:57,028 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2020-12-23 07:21:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:57,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531248037] [2020-12-23 07:21:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:57,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932920176] [2020-12-23 07:21:57,048 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 07:21:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:21:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:57,420 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 07:21:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531248037] [2020-12-23 07:21:57,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:57,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932920176] [2020-12-23 07:21:57,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:57,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:21:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856542882] [2020-12-23 07:21:57,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:21:57,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:21:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:21:57,424 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-12-23 07:21:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:57,552 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-23 07:21:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:21:57,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 07:21:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:57,554 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:21:57,554 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:21:57,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 07:21:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:21:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-23 07:21:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:21:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 07:21:57,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-23 07:21:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:57,562 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 07:21:57,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:21:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 07:21:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:21:57,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:57,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:57,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:57,777 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2020-12-23 07:21:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:57,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357175643] [2020-12-23 07:21:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:57,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:57,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035641547] [2020-12-23 07:21:57,798 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 07:21:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:21:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:58,019 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 07:21:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357175643] [2020-12-23 07:21:58,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035641547] [2020-12-23 07:21:58,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:21:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065183860] [2020-12-23 07:21:58,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:21:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:21:58,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:21:58,023 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-12-23 07:21:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:58,215 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-23 07:21:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:21:58,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 07:21:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:58,220 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:21:58,220 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:21:58,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 07:21:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:21:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 07:21:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:21:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 07:21:58,227 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2020-12-23 07:21:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:58,227 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 07:21:58,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:21:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 07:21:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:21:58,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:58,229 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:58,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:58,443 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2020-12-23 07:21:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:58,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929704947] [2020-12-23 07:21:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:58,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:58,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440184949] [2020-12-23 07:21:58,461 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 07:21:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:21:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:58,566 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 07:21:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929704947] [2020-12-23 07:21:58,567 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:58,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440184949] [2020-12-23 07:21:58,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:58,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:21:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555293570] [2020-12-23 07:21:58,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:21:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:21:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:21:58,577 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 07:21:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:58,627 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 07:21:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:21:58,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 07:21:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:58,630 INFO L225 Difference]: With dead ends: 32 [2020-12-23 07:21:58,631 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:21:58,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:21:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:21:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 07:21:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:21:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 07:21:58,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2020-12-23 07:21:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:58,649 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 07:21:58,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:21:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 07:21:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:21:58,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:58,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:21:58,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:58,866 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2020-12-23 07:21:58,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:58,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122013846] [2020-12-23 07:21:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:58,882 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823873691] [2020-12-23 07:21:58,883 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 07:21:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:21:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:21:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:21:59,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:21:59,143 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 07:21:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122013846] [2020-12-23 07:21:59,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:21:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823873691] [2020-12-23 07:21:59,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:21:59,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:21:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826740539] [2020-12-23 07:21:59,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:21:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:21:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:21:59,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:21:59,146 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 11 states. [2020-12-23 07:21:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:21:59,400 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-23 07:21:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:21:59,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 07:21:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:21:59,401 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:21:59,401 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:21:59,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:21:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:21:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-12-23 07:21:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:21:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 07:21:59,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-12-23 07:21:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:21:59,408 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 07:21:59,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:21:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 07:21:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:21:59,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:21:59,409 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 07:21:59,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:21:59,624 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:21:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:21:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2020-12-23 07:21:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:21:59,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859884336] [2020-12-23 07:21:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:21:59,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:21:59,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249424605] [2020-12-23 07:21:59,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:21:59,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:21:59,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:21:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:21:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:22:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859884336] [2020-12-23 07:22:00,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249424605] [2020-12-23 07:22:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:22:00,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:22:00,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372897272] [2020-12-23 07:22:00,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:22:00,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:22:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:22:00,008 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 11 states. [2020-12-23 07:22:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:00,250 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-12-23 07:22:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:22:00,251 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-23 07:22:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:00,252 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:22:00,252 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:22:00,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 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 07:22:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:22:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-12-23 07:22:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:22:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 07:22:00,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-12-23 07:22:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:00,259 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 07:22:00,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:22:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 07:22:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:22:00,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:00,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:00,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:00,475 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2020-12-23 07:22:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:00,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189223359] [2020-12-23 07:22:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:00,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:00,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004527492] [2020-12-23 07:22:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:22:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189223359] [2020-12-23 07:22:00,839 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004527492] [2020-12-23 07:22:00,840 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:22:00,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:22:00,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:22:00,840 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:22:00,840 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:22:01,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:01,078 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:22:01,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:22:01 BoogieIcfgContainer [2020-12-23 07:22:01,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:22:01,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:22:01,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:22:01,080 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:22:01,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:21:56" (3/4) ... [2020-12-23 07:22:01,086 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:22:01,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:22:01,088 INFO L168 Benchmark]: Toolchain (without parser) took 5749.54 ms. Allocated memory was 156.2 MB in the beginning and 207.6 MB in the end (delta: 51.4 MB). Free memory was 131.9 MB in the beginning and 185.2 MB in the end (delta: -53.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:01,089 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 130.8 MB in the end (delta: 162.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:01,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.16 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:01,091 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:01,091 INFO L168 Benchmark]: Boogie Preprocessor took 23.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 119.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:01,092 INFO L168 Benchmark]: RCFGBuilder took 358.19 ms. Allocated memory is still 156.2 MB. Free memory was 119.2 MB in the beginning and 106.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:01,093 INFO L168 Benchmark]: TraceAbstraction took 4956.22 ms. Allocated memory was 156.2 MB in the beginning and 207.6 MB in the end (delta: 51.4 MB). Free memory was 105.6 MB in the beginning and 185.2 MB in the end (delta: -79.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:01,094 INFO L168 Benchmark]: Witness Printer took 7.04 ms. Allocated memory is still 207.6 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:01,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 130.8 MB in the end (delta: 162.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.16 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 156.2 MB. Free memory was 121.8 MB in the beginning and 120.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.61 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 119.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.19 ms. Allocated memory is still 156.2 MB. Free memory was 119.2 MB in the beginning and 106.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4956.22 ms. Allocated memory was 156.2 MB in the beginning and 207.6 MB in the end (delta: 51.4 MB). Free memory was 105.6 MB in the beginning and 185.2 MB in the end (delta: -79.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 7.04 ms. Allocated memory is still 207.6 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ [L31] EXPR counter++ [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ [L31] EXPR counter++ [L31] COND TRUE counter++<50 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 94 SDslu, 254 SDs, 0 SdLazy, 394 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 41 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 11548 SizeOfPredicates, 66 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...