/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/float-benchs/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:37,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:37,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:37,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:41:37,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:41:37,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:41:37,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:41:37,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:41:37,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:41:37,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:41:37,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:41:37,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:41:37,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:41:37,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:41:37,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:41:37,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:41:37,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:41:37,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:41:37,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:41:37,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:41:37,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:41:37,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:41:37,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:41:37,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:41:37,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:41:37,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:41:37,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:41:37,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:41:37,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:37,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:37,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:37,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:37,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:37,490 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:37,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:37,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:37,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:37,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:37,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:37,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:37,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:37,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:37,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:37,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:37,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:37,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:37,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:37,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:37,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:37,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:37,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:37,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:37,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:37,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:37,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:37,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:37,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:37,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:37,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:37,949 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:37,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter_iir.c [2020-12-22 03:41:38,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef79e9d5/fde7e9ae52614f5c9a6d7dd34a3a8b06/FLAGe78165b0f [2020-12-22 03:41:38,709 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:38,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c [2020-12-22 03:41:38,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef79e9d5/fde7e9ae52614f5c9a6d7dd34a3a8b06/FLAGe78165b0f [2020-12-22 03:41:39,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ef79e9d5/fde7e9ae52614f5c9a6d7dd34a3a8b06 [2020-12-22 03:41:39,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:39,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:39,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:39,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:39,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:39,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c61a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39, skipping insertion in model container [2020-12-22 03:41:39,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:39,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:39,335 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/float-benchs/filter_iir.c[583,596] [2020-12-22 03:41:39,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:39,381 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:39,394 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/float-benchs/filter_iir.c[583,596] [2020-12-22 03:41:39,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:39,442 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:39,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39 WrapperNode [2020-12-22 03:41:39,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:39,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:39,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:39,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:39,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:39,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:39,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:39,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:39,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (1/1) ... [2020-12-22 03:41:39,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:39,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:39,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:39,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:39,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (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 03:41:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-22 03:41:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-22 03:41:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-22 03:41:40,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:40,323 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 03:41:40,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:40 BoogieIcfgContainer [2020-12-22 03:41:40,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:40,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:40,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:40,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:40,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:39" (1/3) ... [2020-12-22 03:41:40,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6367fe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:40, skipping insertion in model container [2020-12-22 03:41:40,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:39" (2/3) ... [2020-12-22 03:41:40,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6367fe0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:40, skipping insertion in model container [2020-12-22 03:41:40,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:40" (3/3) ... [2020-12-22 03:41:40,336 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2020-12-22 03:41:40,344 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:40,350 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:40,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:40,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:40,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:40,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:40,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:40,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:40,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:40,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:40,408 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 03:41:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:40,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:40,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:40,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:40,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2020-12-22 03:41:40,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:40,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469662174] [2020-12-22 03:41:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:40,695 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 03:41:40,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469662174] [2020-12-22 03:41:40,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:40,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:41:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238260790] [2020-12-22 03:41:40,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:41:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:41:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:41:40,724 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-22 03:41:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:40,743 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2020-12-22 03:41:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:41:40,745 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 03:41:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:40,755 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:41:40,755 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:41:40,758 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 03:41:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:41:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:41:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:41:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 03:41:40,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-12-22 03:41:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:40,794 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 03:41:40,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:41:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 03:41:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:40,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:40,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:40,796 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2020-12-22 03:41:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:40,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786327431] [2020-12-22 03:41:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:41,041 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 03:41:41,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786327431] [2020-12-22 03:41:41,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:41,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:41:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467531659] [2020-12-22 03:41:41,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:41:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:41,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:41:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:41:41,046 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2020-12-22 03:41:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:41,086 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-22 03:41:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:41:41,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 03:41:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:41,088 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:41:41,088 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:41:41,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:41:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:41:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:41:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:41:41,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-12-22 03:41:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:41,093 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:41:41,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:41:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:41:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:41,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:41,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:41:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:41:41,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2020-12-22 03:41:41,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:41,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214437788] [2020-12-22 03:41:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:41,273 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:41,375 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:41,421 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:41:41,422 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:41:41,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:41:41,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:41:41 BoogieIcfgContainer [2020-12-22 03:41:41,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:41:41,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:41:41,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:41:41,480 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:41:41,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:40" (3/4) ... [2020-12-22 03:41:41,484 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:41:41,484 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:41:41,487 INFO L168 Benchmark]: Toolchain (without parser) took 2406.91 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 68.3 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,488 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 158.3 MB. Free memory was 131.0 MB in the beginning and 130.9 MB in the end (delta: 152.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:41,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.88 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 122.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.29 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 120.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,490 INFO L168 Benchmark]: Boogie Preprocessor took 37.43 ms. Allocated memory is still 158.3 MB. Free memory was 120.5 MB in the beginning and 118.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,491 INFO L168 Benchmark]: RCFGBuilder took 787.99 ms. Allocated memory is still 158.3 MB. Free memory was 118.8 MB in the beginning and 127.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,492 INFO L168 Benchmark]: TraceAbstraction took 1151.63 ms. Allocated memory is still 158.3 MB. Free memory was 127.0 MB in the beginning and 68.8 MB in the end (delta: 58.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:41,493 INFO L168 Benchmark]: Witness Printer took 4.74 ms. Allocated memory is still 158.3 MB. Free memory was 68.8 MB in the beginning and 68.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:41,499 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 158.3 MB. Free memory was 131.0 MB in the beginning and 130.9 MB in the end (delta: 152.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 358.88 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 122.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.29 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 120.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.43 ms. Allocated memory is still 158.3 MB. Free memory was 120.5 MB in the beginning and 118.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 787.99 ms. Allocated memory is still 158.3 MB. Free memory was 118.8 MB in the beginning and 127.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1151.63 ms. Allocated memory is still 158.3 MB. Free memory was 127.0 MB in the beginning and 68.8 MB in the end (delta: 58.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Witness Printer took 4.74 ms. Allocated memory is still 158.3 MB. Free memory was 68.8 MB in the beginning and 68.3 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 54, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] X >= -10. && X <= 10. VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L11] COND FALSE !(!cond) VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L54] EXPR \read(P) [L54] P >= -1e30 && P <= 1e30 VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L13] COND TRUE !(cond) VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] [L13] reach_error() VAL [A1={15:0}, A2={3:0}, b1={7:0}, b2={10:0}, D1={4:0}, D2={5:0}, P={11:0}, X={14:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 1 SDslu, 24 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 275 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...