/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/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:40:53,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:40:53,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:40:53,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:40:53,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:40:53,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:40:53,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:40:53,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:40:53,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:40:53,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:40:53,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:40:53,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:40:53,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:40:53,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:40:53,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:40:53,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:40:53,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:40:53,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:40:53,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:40:53,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:40:53,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:40:53,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:40:53,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:40:53,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:40:53,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:40:53,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:40:53,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:40:53,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:40:53,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:40:53,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:40:53,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:40:53,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:40:53,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:40:53,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:40:53,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:40:53,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:40:53,250 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 16:40:53,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:40:53,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:40:53,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:40:53,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:40:53,318 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:40:53,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:40:53,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:40:53,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:40:53,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:40:53,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:40:53,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:40:53,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:40:53,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:40:53,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:40:53,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:40:53,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:40:53,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:40:53,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:53,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:40:53,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:40:53,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:40:53,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:40:53,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:40:53,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:40:53,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:40:53,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:40:53,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:40:53,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:40:53,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:40:53,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:40:53,850 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:40:53,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/trex02-1.c [2021-01-06 16:40:53,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/143a9a579/c6991ade578c429887f20d2122be0471/FLAGa57719045 [2021-01-06 16:40:54,600 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:40:54,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/trex02-1.c [2021-01-06 16:40:54,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/143a9a579/c6991ade578c429887f20d2122be0471/FLAGa57719045 [2021-01-06 16:40:55,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/143a9a579/c6991ade578c429887f20d2122be0471 [2021-01-06 16:40:55,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:40:55,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:40:55,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:55,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:40:55,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:40:55,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fdf3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55, skipping insertion in model container [2021-01-06 16:40:55,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:40:55,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:40:55,287 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/loops/trex02-1.c[320,333] left hand side expression in assignment: lhs: VariableLHS[~x~0,GLOBAL] [2021-01-06 16:40:55,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:55,318 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:40:55,332 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/loops/trex02-1.c[320,333] left hand side expression in assignment: lhs: VariableLHS[~x~0,GLOBAL] [2021-01-06 16:40:55,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:55,360 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:40:55,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55 WrapperNode [2021-01-06 16:40:55,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:55,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:55,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:40:55,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:40:55,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:55,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:40:55,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:40:55,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:40:55,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (1/1) ... [2021-01-06 16:40:55,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:40:55,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:40:55,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:40:55,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:40:55,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (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 16:40:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:40:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:40:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:40:55,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:40:55,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:40:55,810 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 16:40:55,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:55 BoogieIcfgContainer [2021-01-06 16:40:55,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:40:55,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:40:55,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:40:55,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:40:55,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:40:55" (1/3) ... [2021-01-06 16:40:55,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a499619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:55, skipping insertion in model container [2021-01-06 16:40:55,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:55" (2/3) ... [2021-01-06 16:40:55,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a499619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:55, skipping insertion in model container [2021-01-06 16:40:55,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:55" (3/3) ... [2021-01-06 16:40:55,822 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2021-01-06 16:40:55,830 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:40:55,836 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:40:55,863 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:40:55,895 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:40:55,895 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:40:55,896 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:40:55,896 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:40:55,896 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:40:55,896 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:40:55,897 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:40:55,897 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:40:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:40:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:55,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:55,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:55,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2021-01-06 16:40:55,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:55,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149950751] [2021-01-06 16:40:55,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:56,191 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 16:40:56,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149950751] [2021-01-06 16:40:56,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:56,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:40:56,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021702918] [2021-01-06 16:40:56,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:40:56,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:40:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:56,228 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-01-06 16:40:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:56,246 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-01-06 16:40:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:40:56,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:40:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:56,259 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:40:56,260 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:40:56,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:40:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:40:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:40:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 16:40:56,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 16:40:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:56,301 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 16:40:56,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:40:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 16:40:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:56,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:56,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:56,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:40:56,303 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:56,304 INFO L82 PathProgramCache]: Analyzing trace with hash 889641779, now seen corresponding path program 1 times [2021-01-06 16:40:56,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:56,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772395982] [2021-01-06 16:40:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:56,406 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 16:40:56,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772395982] [2021-01-06 16:40:56,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:56,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:40:56,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166522960] [2021-01-06 16:40:56,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:40:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:40:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:40:56,411 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-01-06 16:40:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:56,457 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2021-01-06 16:40:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:56,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:40:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:56,459 INFO L225 Difference]: With dead ends: 8 [2021-01-06 16:40:56,459 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:40:56,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 16:40:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:40:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:40:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:40:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:40:56,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-01-06 16:40:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:56,461 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:40:56,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:40:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:40:56,462 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:40:56,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:40:56,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:40:56,479 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:40:56,480 INFO L189 CegarLoopUtils]: For program point L25(lines 25 26) no Hoare annotation was computed. [2021-01-06 16:40:56,480 INFO L189 CegarLoopUtils]: For program point L23-2(lines 23 27) no Hoare annotation was computed. [2021-01-06 16:40:56,480 INFO L192 CegarLoopUtils]: At program point L17-1(lines 17 27) the Hoare annotation is: true [2021-01-06 16:40:56,480 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 16:40:56,480 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:40:56,481 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:40:56,481 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:40:56,481 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-01-06 16:40:56,481 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-01-06 16:40:56,482 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 32) the Hoare annotation is: true [2021-01-06 16:40:56,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:40:56 BoogieIcfgContainer [2021-01-06 16:40:56,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:40:56,494 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:40:56,494 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:40:56,494 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:40:56,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:55" (3/4) ... [2021-01-06 16:40:56,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:40:56,509 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 16:40:56,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:40:56,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:40:56,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:40:56,551 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/trex02-1.c-witness.graphml [2021-01-06 16:40:56,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:40:56,553 INFO L168 Benchmark]: Toolchain (without parser) took 1540.10 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 112.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,554 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:40:56,555 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,556 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,556 INFO L168 Benchmark]: Boogie Preprocessor took 43.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,557 INFO L168 Benchmark]: RCFGBuilder took 353.24 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 103.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,558 INFO L168 Benchmark]: TraceAbstraction took 678.73 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 114.6 MB in the end (delta: -11.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:40:56,559 INFO L168 Benchmark]: Witness Printer took 57.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:56,563 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 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 346.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 47.89 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.03 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 353.24 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 103.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 678.73 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 114.6 MB in the end (delta: -11.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 57.55 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.5 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: 7]: 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: 1 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 3 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 75 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 proved your program to be correct! Received shutdown request...