/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/loop-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:52:05,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:52:05,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:52:05,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:52:05,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:52:05,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:52:05,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:52:05,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:52:05,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:52:05,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:52:05,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:52:05,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:52:05,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:52:05,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:52:05,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:52:05,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:52:05,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:52:05,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:52:05,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:52:05,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:52:05,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:52:05,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:52:05,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:52:05,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:52:05,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:52:05,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:52:05,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:52:05,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:52:05,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:52:05,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:52:05,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:52:05,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:52:05,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:52:05,224 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:52:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:52:05,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:52:05,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:52:05,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:52:05,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:52:05,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:52:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:52:05,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:52:05,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:52:05,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:52:05,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:52:05,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:52:05,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:05,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:52:05,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:52:05,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:52:05,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:52:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:52:05,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:52:05,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:52:05,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:52:05,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:52:05,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:52:05,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:52:05,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:52:05,653 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:52:05,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_3-2.c [2020-12-23 06:52:05,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca802788b/d7dcbcbaac0345e1bdc4f9078cae72f5/FLAGc2644c36d [2020-12-23 06:52:06,311 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:52:06,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_3-2.c [2020-12-23 06:52:06,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca802788b/d7dcbcbaac0345e1bdc4f9078cae72f5/FLAGc2644c36d [2020-12-23 06:52:06,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca802788b/d7dcbcbaac0345e1bdc4f9078cae72f5 [2020-12-23 06:52:06,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:52:06,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:52:06,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:06,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:52:06,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:52:06,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:06,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3203de3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06, skipping insertion in model container [2020-12-23 06:52:06,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:06,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:52:06,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:52:06,896 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_3-2.c[376,389] [2020-12-23 06:52:06,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:06,918 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:52:06,935 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_3-2.c[376,389] [2020-12-23 06:52:06,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:06,954 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:52:06,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06 WrapperNode [2020-12-23 06:52:06,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:06,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:06,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:52:06,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:52:06,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:06,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:06,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:06,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:52:06,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:52:06,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:52:07,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... [2020-12-23 06:52:07,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:52:07,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:52:07,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:52:07,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:52:07,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:07,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:52:07,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:52:07,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:52:07,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:52:07,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:52:07,339 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:52:07,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:07 BoogieIcfgContainer [2020-12-23 06:52:07,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:52:07,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:52:07,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:52:07,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:52:07,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:52:06" (1/3) ... [2020-12-23 06:52:07,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:07, skipping insertion in model container [2020-12-23 06:52:07,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:06" (2/3) ... [2020-12-23 06:52:07,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:07, skipping insertion in model container [2020-12-23 06:52:07,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:07" (3/3) ... [2020-12-23 06:52:07,350 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-12-23 06:52:07,356 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:52:07,359 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:52:07,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:52:07,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:52:07,399 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:52:07,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:52:07,399 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:52:07,399 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:52:07,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:52:07,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:52:07,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:52:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-23 06:52:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:52:07,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:07,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:52:07,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-23 06:52:07,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:07,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909684824] [2020-12-23 06:52:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:07,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909684824] [2020-12-23 06:52:07,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:07,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:52:07,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836797304] [2020-12-23 06:52:07,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:52:07,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:52:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:52:07,688 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-12-23 06:52:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:07,792 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-23 06:52:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:52:07,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 06:52:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:07,824 INFO L225 Difference]: With dead ends: 23 [2020-12-23 06:52:07,825 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:52:07,831 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 [2020-12-23 06:52:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:52:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:52:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:52:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 06:52:07,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-23 06:52:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:07,878 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 06:52:07,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:52:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 06:52:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:52:07,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:07,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:07,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:52:07,883 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-23 06:52:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:07,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30557675] [2020-12-23 06:52:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:08,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30557675] [2020-12-23 06:52:08,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598768171] [2020-12-23 06:52:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:52:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:08,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:08,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 06:52:08,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277667295] [2020-12-23 06:52:08,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:52:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:08,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:52:08,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:08,231 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2020-12-23 06:52:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:08,332 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-12-23 06:52:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:52:08,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-23 06:52:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:08,333 INFO L225 Difference]: With dead ends: 11 [2020-12-23 06:52:08,333 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:52:08,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:52:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:52:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:52:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:52:08,335 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2020-12-23 06:52:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:08,336 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:52:08,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:52:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:52:08,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:52:08,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:52:08,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:52:08,620 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:52:08,621 INFO L185 CegarLoopUtils]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div ULTIMATE.start_main_~x~0 2))) (and (< 0 .cse0) (<= ULTIMATE.start_main_~x~0 (* 2 .cse0)))) (= ULTIMATE.start_main_~x~0 0)) [2020-12-23 06:52:08,621 INFO L189 CegarLoopUtils]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2020-12-23 06:52:08,621 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-23 06:52:08,621 INFO L185 CegarLoopUtils]: At program point L7-2(lines 1 22) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-12-23 06:52:08,622 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:52:08,622 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:52:08,622 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:52:08,623 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-12-23 06:52:08,623 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-23 06:52:08,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:52:08 BoogieIcfgContainer [2020-12-23 06:52:08,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:52:08,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:52:08,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:52:08,643 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:52:08,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:07" (3/4) ... [2020-12-23 06:52:08,647 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:52:08,664 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:52:08,666 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:52:08,669 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:08,669 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:52:08,725 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/simple_3-2.c-witness.graphml [2020-12-23 06:52:08,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:52:08,730 INFO L168 Benchmark]: Toolchain (without parser) took 2021.38 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 88.4 MB in the end (delta: 38.2 MB). Peak memory consumption was 37.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,734 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:52:08,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,740 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.97 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,741 INFO L168 Benchmark]: Boogie Preprocessor took 22.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.9 MB in the end (delta: 844.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,742 INFO L168 Benchmark]: RCFGBuilder took 324.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 104.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,743 INFO L168 Benchmark]: TraceAbstraction took 1299.44 ms. Allocated memory is still 151.0 MB. Free memory was 103.6 MB in the beginning and 90.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,744 INFO L168 Benchmark]: Witness Printer took 83.66 ms. Allocated memory is still 151.0 MB. Free memory was 90.5 MB in the beginning and 88.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:52:08,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.97 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.9 MB in the end (delta: 844.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 104.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1299.44 ms. Allocated memory is still 151.0 MB. Free memory was 103.6 MB in the beginning and 90.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Witness Printer took 83.66 ms. Allocated memory is still 151.0 MB. Free memory was 90.5 MB in the beginning and 88.4 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: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 11 SDslu, 14 SDs, 0 SdLazy, 27 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 21 HoareAnnotationTreeSize, 2 FomulaSimplifications, 9 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 354 SizeOfPredicates, 2 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 correct! Received shutdown request...