/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/prod4br-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:37:02,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:37:02,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:37:02,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:37:02,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:37:02,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:37:02,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:37:02,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:37:02,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:37:02,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:37:02,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:37:02,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:37:02,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:37:02,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:37:02,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:37:02,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:37:02,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:37:02,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:37:02,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:37:02,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:37:02,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:37:02,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:37:02,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:37:02,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:37:02,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:37:02,717 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:37:02,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:37:02,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:37:02,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:37:02,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:37:02,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:37:02,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:37:02,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:37:02,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:37:02,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:37:02,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:37:02,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:37:02,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:37:02,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:37:02,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:37:02,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:37:02,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:37:02,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:37:02,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:37:02,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:37:02,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:37:02,724 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:37:03,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:37:03,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:37:03,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:37:03,258 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:37:03,259 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:37:03,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2020-12-22 05:37:03,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d19c1c8e/8e3188f7665f4fb3b652e837fbf369b6/FLAGf99fd5fb8 [2020-12-22 05:37:03,990 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:37:03,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2020-12-22 05:37:04,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d19c1c8e/8e3188f7665f4fb3b652e837fbf369b6/FLAGf99fd5fb8 [2020-12-22 05:37:04,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d19c1c8e/8e3188f7665f4fb3b652e837fbf369b6 [2020-12-22 05:37:04,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:37:04,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:37:04,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:04,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:37:04,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:37:04,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a072f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04, skipping insertion in model container [2020-12-22 05:37:04,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:37:04,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:37:04,513 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2020-12-22 05:37:04,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:04,548 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:37:04,563 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2020-12-22 05:37:04,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:04,592 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:37:04,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04 WrapperNode [2020-12-22 05:37:04,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:04,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:04,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:37:04,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:37:04,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:04,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:37:04,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:37:04,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:37:04,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... [2020-12-22 05:37:04,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:37:04,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:37:04,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:37:04,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:37:04,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:37:04,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:37:04,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:37:04,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:37:04,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:37:05,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:37:05,111 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:37:05,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:05 BoogieIcfgContainer [2020-12-22 05:37:05,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:37:05,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:37:05,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:37:05,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:37:05,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:37:04" (1/3) ... [2020-12-22 05:37:05,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434f3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:05, skipping insertion in model container [2020-12-22 05:37:05,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:04" (2/3) ... [2020-12-22 05:37:05,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434f3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:05, skipping insertion in model container [2020-12-22 05:37:05,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:05" (3/3) ... [2020-12-22 05:37:05,125 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound1.c [2020-12-22 05:37:05,135 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:37:05,143 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:37:05,169 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:37:05,218 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:37:05,218 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:37:05,218 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:37:05,218 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:37:05,218 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:37:05,219 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:37:05,219 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:37:05,219 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:37:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 05:37:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:37:05,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:05,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:05,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2020-12-22 05:37:05,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:05,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251760330] [2020-12-22 05:37:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:05,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251760330] [2020-12-22 05:37:05,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:05,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:37:05,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988268314] [2020-12-22 05:37:05,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:37:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:37:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:37:05,456 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 05:37:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:05,476 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-22 05:37:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:37:05,478 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:37:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:05,488 INFO L225 Difference]: With dead ends: 47 [2020-12-22 05:37:05,489 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:37:05,492 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 [2020-12-22 05:37:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:37:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 05:37:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 05:37:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-22 05:37:05,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-12-22 05:37:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:05,538 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-22 05:37:05,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:37:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-22 05:37:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:37:05,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:05,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:05,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:37:05,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:37:05,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:05,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944200368] [2020-12-22 05:37:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:05,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:05,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973933958] [2020-12-22 05:37:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:37:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:37:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:05,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944200368] [2020-12-22 05:37:05,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:05,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973933958] [2020-12-22 05:37:05,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:05,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:37:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617548700] [2020-12-22 05:37:05,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:37:05,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:05,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:37:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:05,971 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-22 05:37:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:06,410 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-22 05:37:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:37:06,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 05:37:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:06,415 INFO L225 Difference]: With dead ends: 42 [2020-12-22 05:37:06,416 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 05:37:06,417 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 [2020-12-22 05:37:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 05:37:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-12-22 05:37:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:37:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 05:37:06,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2020-12-22 05:37:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:06,425 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 05:37:06,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:37:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 05:37:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:37:06,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:06,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:06,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:37:06,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2020-12-22 05:37:06,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:06,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644673565] [2020-12-22 05:37:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:06,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644673565] [2020-12-22 05:37:06,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:06,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:37:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756338927] [2020-12-22 05:37:06,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:37:06,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:37:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:37:06,711 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-12-22 05:37:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:06,737 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-22 05:37:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:37:06,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 05:37:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:06,739 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:37:06,739 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:37:06,740 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 [2020-12-22 05:37:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:37:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:37:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:37:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 05:37:06,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-22 05:37:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:06,747 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 05:37:06,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:37:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 05:37:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:37:06,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:06,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:06,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:37:06,749 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2020-12-22 05:37:06,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:06,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950145403] [2020-12-22 05:37:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:06,764 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:06,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403006717] [2020-12-22 05:37:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:37:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:37:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:06,941 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:07,613 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 05:37:07,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:07,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:07,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:37:07,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:07,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:07,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:37:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:07,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950145403] [2020-12-22 05:37:07,804 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:07,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403006717] [2020-12-22 05:37:07,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:07,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:37:07,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566602204] [2020-12-22 05:37:07,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:37:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:07,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:37:07,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:37:07,813 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-12-22 05:37:08,020 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 05:37:08,855 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 05:37:09,039 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-22 05:37:09,237 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-12-22 05:37:13,967 WARN L197 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 05:37:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:14,742 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-12-22 05:37:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:37:14,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 05:37:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:14,744 INFO L225 Difference]: With dead ends: 52 [2020-12-22 05:37:14,744 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 05:37:14,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:37:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 05:37:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-12-22 05:37:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:37:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-22 05:37:14,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 11 [2020-12-22 05:37:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:14,752 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-22 05:37:14,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:37:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-22 05:37:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:37:14,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:14,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:14,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:14,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2020-12-22 05:37:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:14,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071061441] [2020-12-22 05:37:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:14,985 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:14,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893577342] [2020-12-22 05:37:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:37:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:37:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:15,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071061441] [2020-12-22 05:37:15,111 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:15,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893577342] [2020-12-22 05:37:15,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:15,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:37:15,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766435271] [2020-12-22 05:37:15,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:37:15,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:15,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:37:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:37:15,114 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-22 05:37:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:15,150 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-22 05:37:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:37:15,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 05:37:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:15,152 INFO L225 Difference]: With dead ends: 46 [2020-12-22 05:37:15,152 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:37:15,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:37:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-22 05:37:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 05:37:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 05:37:15,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-12-22 05:37:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:15,159 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 05:37:15,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:37:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 05:37:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:37:15,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:15,160 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:15,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:15,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2020-12-22 05:37:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:15,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407499096] [2020-12-22 05:37:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:15,388 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:15,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487396417] [2020-12-22 05:37:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:37:15,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:37:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:37:15,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:37:15,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:37:15,552 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:37:15,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:15,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:37:15 BoogieIcfgContainer [2020-12-22 05:37:15,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:37:15,807 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:37:15,807 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:37:15,808 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:37:15,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:05" (3/4) ... [2020-12-22 05:37:15,811 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:37:15,870 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c-witness.graphml [2020-12-22 05:37:15,871 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:37:15,873 INFO L168 Benchmark]: Toolchain (without parser) took 11554.62 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 133.2 MB in the beginning and 126.8 MB in the end (delta: 6.4 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,873 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:37:15,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.64 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 123.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,875 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.04 ms. Allocated memory is still 157.3 MB. Free memory was 122.9 MB in the beginning and 121.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,875 INFO L168 Benchmark]: Boogie Preprocessor took 27.79 ms. Allocated memory is still 157.3 MB. Free memory was 121.2 MB in the beginning and 120.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,879 INFO L168 Benchmark]: RCFGBuilder took 444.09 ms. Allocated memory is still 157.3 MB. Free memory was 120.0 MB in the beginning and 105.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,880 INFO L168 Benchmark]: TraceAbstraction took 10691.52 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 104.6 MB in the beginning and 128.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,881 INFO L168 Benchmark]: Witness Printer took 63.49 ms. Allocated memory is still 188.7 MB. Free memory was 128.9 MB in the beginning and 126.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:15,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 129.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.64 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 123.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 46.04 ms. Allocated memory is still 157.3 MB. Free memory was 122.9 MB in the beginning and 121.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.79 ms. Allocated memory is still 157.3 MB. Free memory was 121.2 MB in the beginning and 120.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 444.09 ms. Allocated memory is still 157.3 MB. Free memory was 120.0 MB in the beginning and 105.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10691.52 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 104.6 MB in the beginning and 128.9 MB in the end (delta: -24.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. * Witness Printer took 63.49 ms. Allocated memory is still 188.7 MB. Free memory was 128.9 MB in the beginning and 126.8 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L12] COND TRUE !(cond) VAL [counter=2] [L14] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.5s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 222 SDslu, 166 SDs, 0 SdLazy, 161 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, 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, 5 MinimizatonAttempts, 32 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 44 ConstructedInterpolants, 1 QuantifiedInterpolants, 2742 SizeOfPredicates, 21 NumberOfNonLiveVariables, 226 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 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...