/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:02:43,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:02:43,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:02:43,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:02:43,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:02:43,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:02:43,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:02:43,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:02:43,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:02:43,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:02:43,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:02:43,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:02:43,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:02:43,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:02:43,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:02:43,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:02:43,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:02:43,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:02:43,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:02:43,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:02:43,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:02:43,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:02:43,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:02:43,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:02:43,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 08:02:43,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 08:02:43,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 08:02:43,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 08:02:43,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 08:02:43,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 08:02:43,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:02:43,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:02:43,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:02:43,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:02:43,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:02:43,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:02:43,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:02:43,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:02:43,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:02:43,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:02:43,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:02:43,774 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 08:02:43,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:02:43,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:02:43,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:02:43,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:02:43,827 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:02:43,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:02:43,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:02:43,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:02:43,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:02:43,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:02:43,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:02:43,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:02:43,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:02:43,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:02:43,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:02:43,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:02:43,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:02:43,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:02:43,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:02:43,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:02:43,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:02:43,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:02:43,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:02:43,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:02:43,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:02:43,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:02:44,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:02:44,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:02:44,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:02:44,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:02:44,260 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:02:44,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-12-23 08:02:44,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d42ca7c0b/e4a45b715706464ea9951c8d0dbfad23/FLAG27081847f [2020-12-23 08:02:44,947 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:02:44,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2020-12-23 08:02:44,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d42ca7c0b/e4a45b715706464ea9951c8d0dbfad23/FLAG27081847f [2020-12-23 08:02:45,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d42ca7c0b/e4a45b715706464ea9951c8d0dbfad23 [2020-12-23 08:02:45,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:02:45,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:02:45,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:02:45,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:02:45,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:02:45,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d075306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45, skipping insertion in model container [2020-12-23 08:02:45,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:02:45,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:02:45,523 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/prodbin-ll_unwindbound1.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~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[~y~0,] [2020-12-23 08:02:45,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:02:45,553 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:02:45,565 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/prodbin-ll_unwindbound1.c[537,550] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~z~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[~y~0,] [2020-12-23 08:02:45,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:02:45,587 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:02:45,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45 WrapperNode [2020-12-23 08:02:45,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:02:45,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:02:45,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:02:45,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:02:45,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:02:45,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:02:45,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:02:45,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:02:45,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (1/1) ... [2020-12-23 08:02:45,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:02:45,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:02:45,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:02:45,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:02:45,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (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 08:02:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:02:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:02:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:02:45,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:02:46,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:02:46,023 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 08:02:46,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:02:46 BoogieIcfgContainer [2020-12-23 08:02:46,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:02:46,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:02:46,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:02:46,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:02:46,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:02:45" (1/3) ... [2020-12-23 08:02:46,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461ea565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:02:46, skipping insertion in model container [2020-12-23 08:02:46,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:02:45" (2/3) ... [2020-12-23 08:02:46,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461ea565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:02:46, skipping insertion in model container [2020-12-23 08:02:46,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:02:46" (3/3) ... [2020-12-23 08:02:46,035 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2020-12-23 08:02:46,043 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:02:46,048 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 08:02:46,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 08:02:46,124 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:02:46,125 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:02:46,125 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:02:46,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:02:46,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:02:46,125 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:02:46,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:02:46,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:02:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 08:02:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:02:46,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:46,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:46,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2020-12-23 08:02:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:46,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507696964] [2020-12-23 08:02:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:46,424 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 08:02:46,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507696964] [2020-12-23 08:02:46,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:02:46,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:02:46,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854224213] [2020-12-23 08:02:46,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:02:46,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:02:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:02:46,450 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 08:02:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:46,469 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-23 08:02:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:02:46,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 08:02:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:46,481 INFO L225 Difference]: With dead ends: 37 [2020-12-23 08:02:46,481 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 08:02:46,484 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 08:02:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 08:02:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 08:02:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 08:02:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 08:02:46,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 08:02:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:46,522 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 08:02:46,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:02:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 08:02:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 08:02:46,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:46,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:46,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:02:46,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:46,525 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 08:02:46,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:46,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461824828] [2020-12-23 08:02:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:46,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:46,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92865044] [2020-12-23 08:02:46,546 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 08:02:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 08:02:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:46,875 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 08:02:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461824828] [2020-12-23 08:02:46,876 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92865044] [2020-12-23 08:02:46,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:02:46,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 08:02:46,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705142643] [2020-12-23 08:02:46,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:02:46,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:02:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:02:46,881 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-23 08:02:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:47,249 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 08:02:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 08:02:47,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 08:02:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:47,251 INFO L225 Difference]: With dead ends: 36 [2020-12-23 08:02:47,251 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 08:02:47,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 08:02:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 08:02:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-23 08:02:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:02:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-23 08:02:47,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-23 08:02:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:47,259 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-23 08:02:47,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:02:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-23 08:02:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 08:02:47,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:47,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:47,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:02:47,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2020-12-23 08:02:47,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:47,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143723016] [2020-12-23 08:02:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:47,557 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 08:02:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143723016] [2020-12-23 08:02:47,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:02:47,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 08:02:47,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134517137] [2020-12-23 08:02:47,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 08:02:47,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 08:02:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:02:47,562 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-23 08:02:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:47,583 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 08:02:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 08:02:47,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 08:02:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:47,585 INFO L225 Difference]: With dead ends: 24 [2020-12-23 08:02:47,585 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 08:02:47,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 08:02:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 08:02:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 08:02:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:02:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 08:02:47,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2020-12-23 08:02:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:47,593 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 08:02:47,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 08:02:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 08:02:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 08:02:47,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:47,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:47,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 08:02:47,595 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2020-12-23 08:02:47,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:47,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537291258] [2020-12-23 08:02:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:47,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:47,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986655195] [2020-12-23 08:02:47,631 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 08:02:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:02:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 08:02:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:02:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:02:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537291258] [2020-12-23 08:02:47,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:02:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986655195] [2020-12-23 08:02:47,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:02:47,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 08:02:47,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414711962] [2020-12-23 08:02:47,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:02:47,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:02:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:02:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:02:47,832 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-12-23 08:02:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:02:47,867 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 08:02:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 08:02:47,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 08:02:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:02:47,868 INFO L225 Difference]: With dead ends: 28 [2020-12-23 08:02:47,868 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 08:02:47,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:02:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 08:02:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 08:02:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 08:02:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-23 08:02:47,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-23 08:02:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:02:47,874 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-23 08:02:47,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:02:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-23 08:02:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 08:02:47,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:02:47,875 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:02:48,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:48,090 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:02:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:02:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2020-12-23 08:02:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:02:48,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041489634] [2020-12-23 08:02:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:02:48,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:02:48,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889040604] [2020-12-23 08:02:48,114 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 08:02:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 08:02:48,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:02:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 08:02:48,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 08:02:48,236 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 08:02:48,237 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 08:02:48,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:02:48,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 08:02:48 BoogieIcfgContainer [2020-12-23 08:02:48,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 08:02:48,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 08:02:48,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 08:02:48,493 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 08:02:48,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:02:46" (3/4) ... [2020-12-23 08:02:48,496 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 08:02:48,555 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prodbin-ll_unwindbound1.c-witness.graphml [2020-12-23 08:02:48,556 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 08:02:48,558 INFO L168 Benchmark]: Toolchain (without parser) took 3222.30 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.4 MB in the beginning and 157.3 MB in the end (delta: -31.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:02:48,558 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 08:02:48,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.17 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,561 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 113.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,561 INFO L168 Benchmark]: RCFGBuilder took 374.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 99.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,562 INFO L168 Benchmark]: TraceAbstraction took 2465.16 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 99.3 MB in the beginning and 159.8 MB in the end (delta: -60.5 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,563 INFO L168 Benchmark]: Witness Printer took 63.12 ms. Allocated memory is still 181.4 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 08:02:48,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.17 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 113.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.90 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 99.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2465.16 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 99.3 MB in the beginning and 159.8 MB in the end (delta: -60.5 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. * Witness Printer took 63.12 ms. Allocated memory is still 181.4 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L13] COND TRUE !(cond) VAL [counter=2] [L15] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 78 SDslu, 60 SDs, 0 SdLazy, 45 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 991 SizeOfPredicates, 9 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 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 proved your program to be incorrect! Received shutdown request...