/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-178dd20 [2021-01-06 16:46:18,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:46:18,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:46:18,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:46:18,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:46:18,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:46:18,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:46:18,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:46:18,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:46:18,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:46:18,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:46:18,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:46:18,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:46:18,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:46:18,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:46:18,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:46:18,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:46:18,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:46:18,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:46:18,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:46:18,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:46:18,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:46:18,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:46:18,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:46:18,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:46:18,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:46:18,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:46:18,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:46:18,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:46:18,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:46:18,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:46:18,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:46:18,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:46:18,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:46:18,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:46:18,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:46:18,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:46:18,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:46:18,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:46:18,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:46:18,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:46:18,350 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:46:18,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:46:18,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:46:18,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:46:18,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:46:18,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:46:18,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:46:18,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:46:18,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:46:18,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:46:18,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:46:18,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:46:18,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:46:18,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:18,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:46:18,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:46:18,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:46:18,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:46:18,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:46:18,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:46:18,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:46:18,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:46:18,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:46:18,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:46:18,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:46:18,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:46:18,794 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:46:18,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_3-2.c [2021-01-06 16:46:18,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/89a925ca3/ac9627e314d04aacad413d7b910ce54e/FLAGbc432f250 [2021-01-06 16:46:19,472 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:46:19,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_3-2.c [2021-01-06 16:46:19,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/89a925ca3/ac9627e314d04aacad413d7b910ce54e/FLAGbc432f250 [2021-01-06 16:46:19,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/89a925ca3/ac9627e314d04aacad413d7b910ce54e [2021-01-06 16:46:19,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:46:19,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:46:19,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:19,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:46:19,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:46:19,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:19" (1/1) ... [2021-01-06 16:46:19,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b638b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:19, skipping insertion in model container [2021-01-06 16:46:19,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:19" (1/1) ... [2021-01-06 16:46:19,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:46:19,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:46:20,029 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] [2021-01-06 16:46:20,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:20,050 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:46:20,064 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] [2021-01-06 16:46:20,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:20,082 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:46:20,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20 WrapperNode [2021-01-06 16:46:20,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:20,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:20,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:46:20,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:46:20,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:20,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:46:20,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:46:20,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:46:20,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:46:20,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:46:20,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:46:20,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:46:20,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:20,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:46:20,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:46:20,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:46:20,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:46:20,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:46:20,569 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:46:20,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:20 BoogieIcfgContainer [2021-01-06 16:46:20,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:46:20,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:46:20,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:46:20,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:46:20,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:46:19" (1/3) ... [2021-01-06 16:46:20,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b52eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:20, skipping insertion in model container [2021-01-06 16:46:20,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (2/3) ... [2021-01-06 16:46:20,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b52eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:20, skipping insertion in model container [2021-01-06 16:46:20,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:20" (3/3) ... [2021-01-06 16:46:20,580 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2021-01-06 16:46:20,587 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:46:20,591 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:46:20,610 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:46:20,637 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:46:20,637 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:46:20,637 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:46:20,637 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:46:20,637 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:46:20,638 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:46:20,638 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:46:20,638 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:46:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:46:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:46:20,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:20,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:46:20,659 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:46:20,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:20,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398404810] [2021-01-06 16:46:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:20,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398404810] [2021-01-06 16:46:20,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:46:20,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:46:20,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695887069] [2021-01-06 16:46:20,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:46:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:46:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:46:20,968 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2021-01-06 16:46:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:21,071 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-01-06 16:46:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:46:21,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:46:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:21,083 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:46:21,083 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:46:21,087 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 [2021-01-06 16:46:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:46:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:46:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:46:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:46:21,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:46:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:21,126 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:46:21,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:46:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:46:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:46:21,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:21,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:21,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:46:21,128 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:46:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154194686] [2021-01-06 16:46:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154194686] [2021-01-06 16:46:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879845516] [2021-01-06 16:46:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:46:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:21,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:21,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 16:46:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723795748] [2021-01-06 16:46:21,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:46:21,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:46:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:46:21,389 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2021-01-06 16:46:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:21,435 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-01-06 16:46:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:46:21,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2021-01-06 16:46:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:21,436 INFO L225 Difference]: With dead ends: 11 [2021-01-06 16:46:21,436 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:46:21,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:46:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:46:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:46:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:46:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:46:21,438 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-01-06 16:46:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:21,439 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:46:21,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:46:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:46:21,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:46:21,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:46:21,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:46:21,690 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:46:21,690 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)) [2021-01-06 16:46:21,691 INFO L189 CegarLoopUtils]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2021-01-06 16:46:21,691 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-01-06 16:46:21,691 INFO L185 CegarLoopUtils]: At program point L7-2(lines 1 22) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2021-01-06 16:46:21,691 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:46:21,691 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:46:21,691 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:46:21,692 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-01-06 16:46:21,692 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-01-06 16:46:21,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:46:21 BoogieIcfgContainer [2021-01-06 16:46:21,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:46:21,709 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:46:21,709 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:46:21,710 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:46:21,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:20" (3/4) ... [2021-01-06 16:46:21,714 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:46:21,724 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 16:46:21,724 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:46:21,725 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:46:21,725 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:46:21,759 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/simple_3-2.c-witness.graphml [2021-01-06 16:46:21,760 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:46:21,762 INFO L168 Benchmark]: Toolchain (without parser) took 1905.16 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 112.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,762 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:46:21,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.73 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,765 INFO L168 Benchmark]: Boogie Preprocessor took 21.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 113.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,765 INFO L168 Benchmark]: RCFGBuilder took 428.43 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 102.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,766 INFO L168 Benchmark]: TraceAbstraction took 1135.74 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 114.9 MB in the end (delta: -13.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:46:21,766 INFO L168 Benchmark]: Witness Printer took 50.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 112.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:21,770 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 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.73 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.36 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 113.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.43 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 102.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1135.74 ms. Allocated memory is still 151.0 MB. Free memory was 101.7 MB in the beginning and 114.9 MB in the end (delta: -13.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 50.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 112.8 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: - 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: 1.0s, 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, 0.0s 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...