/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:57:15,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:57:15,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:57:15,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:57:15,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:57:15,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:57:15,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:57:15,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:57:15,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:57:15,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:57:15,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:57:15,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:57:15,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:57:15,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:57:15,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:57:15,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:57:15,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:57:15,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:57:15,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:57:15,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:57:15,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:57:15,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:57:15,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:57:15,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:57:15,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:57:15,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:57:15,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:57:15,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:57:15,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:57:15,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:57:15,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:57:15,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:57:15,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:57:15,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:57:15,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:57:15,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:57:15,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:57:15,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:57:15,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:57:15,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:57:15,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:57:15,665 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:57:15,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:57:15,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:57:15,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:57:15,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:57:15,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:57:15,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:57:15,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:57:15,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:57:15,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:57:15,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:57:15,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:57:15,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:57:15,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:15,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:57:15,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:57:15,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:57:15,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:57:15,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:57:15,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:57:15,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:57:15,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:57:16,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:57:16,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:57:16,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:57:16,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:57:16,152 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:57:16,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-01-06 17:57:16,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a4c32620/f0b9ef9050814d3b9ceb5bd3c71a53ac/FLAGc95ef681a [2021-01-06 17:57:16,920 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:57:16,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-01-06 17:57:16,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a4c32620/f0b9ef9050814d3b9ceb5bd3c71a53ac/FLAGc95ef681a [2021-01-06 17:57:17,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1a4c32620/f0b9ef9050814d3b9ceb5bd3c71a53ac [2021-01-06 17:57:17,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:57:17,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:57:17,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:17,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:57:17,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:57:17,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b32aa21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17, skipping insertion in model container [2021-01-06 17:57:17,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:57:17,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:57:17,473 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_unwindbound100.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,] [2021-01-06 17:57:17,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:17,513 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:57:17,532 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_unwindbound100.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,] [2021-01-06 17:57:17,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:57:17,583 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:57:17,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17 WrapperNode [2021-01-06 17:57:17,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:57:17,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:17,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:57:17,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:57:17,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:57:17,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:57:17,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:57:17,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:57:17,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... [2021-01-06 17:57:17,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:57:17,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:57:17,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:57:17,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:57:17,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:57:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:57:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:57:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:57:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:57:18,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:57:18,096 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 17:57:18,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:18 BoogieIcfgContainer [2021-01-06 17:57:18,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:57:18,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:57:18,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:57:18,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:57:18,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:57:17" (1/3) ... [2021-01-06 17:57:18,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f9e455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:18, skipping insertion in model container [2021-01-06 17:57:18,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:57:17" (2/3) ... [2021-01-06 17:57:18,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f9e455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:57:18, skipping insertion in model container [2021-01-06 17:57:18,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:18" (3/3) ... [2021-01-06 17:57:18,106 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2021-01-06 17:57:18,113 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:57:18,118 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:57:18,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:57:18,163 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:57:18,163 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:57:18,164 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:57:18,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:57:18,164 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:57:18,164 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:57:18,164 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:57:18,164 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:57:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:57:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:18,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:18,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:18,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-01-06 17:57:18,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:18,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55516225] [2021-01-06 17:57:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55516225] [2021-01-06 17:57:18,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:18,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:57:18,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439592449] [2021-01-06 17:57:18,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:57:18,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:57:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:57:18,400 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:57:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:18,421 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-01-06 17:57:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:57:18,422 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:57:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:18,433 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:57:18,433 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:57:18,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:57:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:57:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:57:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:57:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 17:57:18,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-01-06 17:57:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:18,477 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 17:57:18,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:57:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 17:57:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:57:18,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:18,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:18,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:57:18,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 17:57:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:18,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942333565] [2021-01-06 17:57:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:18,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:18,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255774140] [2021-01-06 17:57:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:57:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942333565] [2021-01-06 17:57:18,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:18,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255774140] [2021-01-06 17:57:18,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:18,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:57:18,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011091311] [2021-01-06 17:57:18,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:57:18,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:18,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:57:18,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:18,723 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-01-06 17:57:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:18,990 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-06 17:57:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:57:18,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:57:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:18,992 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:57:18,992 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:18,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-01-06 17:57:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 17:57:19,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2021-01-06 17:57:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:19,001 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 17:57:19,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:57:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 17:57:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:57:19,002 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:19,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:19,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:57:19,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-01-06 17:57:19,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:19,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429314517] [2021-01-06 17:57:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429314517] [2021-01-06 17:57:19,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:19,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:57:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538988242] [2021-01-06 17:57:19,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:57:19,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:19,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:57:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:57:19,332 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2021-01-06 17:57:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:19,362 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-01-06 17:57:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:57:19,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 17:57:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:19,367 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:57:19,368 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:57:19,368 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 [2021-01-06 17:57:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:57:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 17:57:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:57:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 17:57:19,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-01-06 17:57:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:19,378 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 17:57:19,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:57:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 17:57:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:19,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:19,380 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:19,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:57:19,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-01-06 17:57:19,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:19,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983989357] [2021-01-06 17:57:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:19,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:19,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611450066] [2021-01-06 17:57:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:57:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:19,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:19,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:19,900 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:57:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:21,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983989357] [2021-01-06 17:57:21,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:21,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611450066] [2021-01-06 17:57:21,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:21,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:57:21,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042801458] [2021-01-06 17:57:21,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:57:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:57:21,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:57:21,974 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-01-06 17:57:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:22,395 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 17:57:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:22,396 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 17:57:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:22,397 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:57:22,397 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:57:22,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:57:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:57:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-01-06 17:57:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 17:57:22,405 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2021-01-06 17:57:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:22,405 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 17:57:22,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:57:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 17:57:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:57:22,406 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:22,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:22,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:22,621 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-01-06 17:57:22,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:22,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987361751] [2021-01-06 17:57:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:22,636 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:22,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923718745] [2021-01-06 17:57:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:57:22,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:22,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:22,892 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:22,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:57:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:24,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987361751] [2021-01-06 17:57:24,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:24,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923718745] [2021-01-06 17:57:24,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:24,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:57:24,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865907770] [2021-01-06 17:57:24,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:57:24,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:57:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:57:24,961 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-01-06 17:57:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:27,147 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-01-06 17:57:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:57:27,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:57:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:27,149 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:57:27,149 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:57:27,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:57:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:57:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-01-06 17:57:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 17:57:27,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2021-01-06 17:57:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:27,157 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 17:57:27,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:57:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 17:57:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:57:27,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:27,158 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:27,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:27,360 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-01-06 17:57:27,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:27,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846701184] [2021-01-06 17:57:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:27,372 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:27,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876526960] [2021-01-06 17:57:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:57:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:27,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846701184] [2021-01-06 17:57:27,461 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:27,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876526960] [2021-01-06 17:57:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:57:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041721631] [2021-01-06 17:57:27,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:57:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:57:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:57:27,464 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2021-01-06 17:57:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:27,487 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-01-06 17:57:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:57:27,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:57:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:27,489 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:57:27,489 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:57:27,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:57:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:57:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 17:57:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:57:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:57:27,495 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-01-06 17:57:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:27,496 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:57:27,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:57:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:57:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:57:27,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:27,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:27,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:27,711 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-01-06 17:57:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:27,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003184278] [2021-01-06 17:57:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:27,724 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:27,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245960859] [2021-01-06 17:57:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:57:27,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:57:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:57:28,369 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-01-06 17:57:28,376 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2021-01-06 17:57:28,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:57:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:57:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003184278] [2021-01-06 17:57:28,459 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:28,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245960859] [2021-01-06 17:57:28,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:57:28,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:57:28,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958208968] [2021-01-06 17:57:28,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:57:28,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:57:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:57:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:57:28,461 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2021-01-06 17:57:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:57:31,551 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 17:57:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:57:31,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 17:57:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:57:31,552 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:57:31,552 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:57:31,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:57:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:57:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-01-06 17:57:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:57:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:57:31,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:57:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:57:31,561 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:57:31,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:57:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:57:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:57:31,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:57:31,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:57:31,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:57:31,764 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:57:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:57:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2021-01-06 17:57:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:57:31,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304860023] [2021-01-06 17:57:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:57:31,779 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:57:31,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222638880] [2021-01-06 17:57:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:57:31,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:57:31,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:57:31,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:57:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:58:06,193 WARN L197 SmtUtils]: Spent 26.96 s on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 17:58:15,084 WARN L197 SmtUtils]: Spent 4.85 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 17:58:25,928 WARN L197 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 25 [2021-01-06 17:58:34,218 WARN L197 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-01-06 17:58:40,429 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-01-06 17:58:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304860023] [2021-01-06 17:58:40,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:58:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222638880] [2021-01-06 17:58:40,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:58:40,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:58:40,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:58:40,456 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:58:40,456 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:58:40,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:58:40,684 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:58:40,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:58:40 BoogieIcfgContainer [2021-01-06 17:58:40,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:58:40,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:58:40,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:58:40,686 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:58:40,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:57:18" (3/4) ... [2021-01-06 17:58:40,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:58:40,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:58:40,693 INFO L168 Benchmark]: Toolchain (without parser) took 83434.49 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.5 MB in the beginning and 126.4 MB in the end (delta: -878.4 kB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,694 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:40,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.05 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.21 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 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,696 INFO L168 Benchmark]: Boogie Preprocessor took 49.68 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,697 INFO L168 Benchmark]: RCFGBuilder took 395.02 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 133.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,698 INFO L168 Benchmark]: TraceAbstraction took 82585.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.5 MB in the beginning and 126.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:58:40,698 INFO L168 Benchmark]: Witness Printer took 5.98 ms. Allocated memory is still 181.4 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:58:40,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 322.05 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 58.21 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 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.68 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 395.02 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 133.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82585.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 132.5 MB in the beginning and 126.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.98 ms. Allocated memory is still 181.4 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L20] int 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) [L29] x = a [L30] y = b [L31] z = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND FALSE !(!(cond)) [L35] COND FALSE !(!(y != 0)) [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 [L42] x = 2 * x [L43] y = y / 2 [L33] EXPR counter++ [L33] COND TRUE counter++<100 [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 82.5s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 284 SDslu, 163 SDs, 0 SdLazy, 224 SolverSat, 65 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, 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, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 1 QuantifiedInterpolants, 7714 SizeOfPredicates, 37 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 0/12 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...