/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/trex03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:21:38,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:21:38,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:21:38,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:21:38,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:21:38,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:21:38,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:21:38,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:21:38,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:21:38,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:21:38,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:21:38,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:21:38,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:21:38,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:21:38,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:21:38,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:21:38,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:21:38,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:21:38,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:21:38,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:21:38,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:21:38,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:21:38,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:21:38,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:21:38,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:21:38,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:21:38,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:21:38,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:21:38,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:21:38,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:21:38,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:21:38,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:21:38,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:21:38,687 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:21:38,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:21:38,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:21:38,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:21:38,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:21:38,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:21:38,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:21:38,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:21:38,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:21:38,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:21:38,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:21:38,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:21:38,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:21:38,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:38,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:21:38,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:21:38,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:21:38,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:21:38,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:21:38,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:21:38,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:21:38,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:21:39,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:21:39,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:21:39,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:21:39,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:21:39,126 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:21:39,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/trex03-2.c [2020-12-22 04:21:39,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173d7fc0/92e99f2c056e4ee8a56447ecb5aac6ae/FLAG61526048a [2020-12-22 04:21:39,789 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:21:39,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex03-2.c [2020-12-22 04:21:39,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173d7fc0/92e99f2c056e4ee8a56447ecb5aac6ae/FLAG61526048a [2020-12-22 04:21:40,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d173d7fc0/92e99f2c056e4ee8a56447ecb5aac6ae [2020-12-22 04:21:40,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:21:40,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:21:40,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:40,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:21:40,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:21:40,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc16a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40, skipping insertion in model container [2020-12-22 04:21:40,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:21:40,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:21:40,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex03-2.c[320,333] [2020-12-22 04:21:40,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:40,364 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:21:40,378 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex03-2.c[320,333] [2020-12-22 04:21:40,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:21:40,399 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:21:40,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40 WrapperNode [2020-12-22 04:21:40,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:21:40,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:40,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:21:40,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:21:40,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:21:40,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:21:40,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:21:40,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:21:40,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... [2020-12-22 04:21:40,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:21:40,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:21:40,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:21:40,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:21:40,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:21:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:21:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:21:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:21:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:21:40,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:21:40,823 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:21:40,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:40 BoogieIcfgContainer [2020-12-22 04:21:40,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:21:40,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:21:40,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:21:40,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:21:40,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:21:40" (1/3) ... [2020-12-22 04:21:40,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c083c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:40, skipping insertion in model container [2020-12-22 04:21:40,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:21:40" (2/3) ... [2020-12-22 04:21:40,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c083c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:21:40, skipping insertion in model container [2020-12-22 04:21:40,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:40" (3/3) ... [2020-12-22 04:21:40,857 INFO L111 eAbstractionObserver]: Analyzing ICFG trex03-2.c [2020-12-22 04:21:40,871 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:21:40,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:21:40,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:21:41,006 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:21:41,006 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:21:41,006 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:21:41,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:21:41,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:21:41,009 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:21:41,009 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:21:41,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:21:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-22 04:21:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:41,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:41,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:41,058 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 890122407, now seen corresponding path program 1 times [2020-12-22 04:21:41,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:41,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115902626] [2020-12-22 04:21:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:41,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115902626] [2020-12-22 04:21:41,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:41,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:21:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568867788] [2020-12-22 04:21:41,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:21:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:21:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:41,288 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-22 04:21:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:41,305 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-22 04:21:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:21:41,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:21:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:41,316 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:21:41,317 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:21:41,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:21:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:21:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:21:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:21:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-22 04:21:41,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2020-12-22 04:21:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:41,362 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-22 04:21:41,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:21:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-22 04:21:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:21:41,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:21:41,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:21:41,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:21:41,365 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:21:41,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:21:41,370 INFO L82 PathProgramCache]: Analyzing trace with hash 889645751, now seen corresponding path program 1 times [2020-12-22 04:21:41,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:21:41,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563461454] [2020-12-22 04:21:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:21:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:21:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:21:41,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563461454] [2020-12-22 04:21:41,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:21:41,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:21:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477801060] [2020-12-22 04:21:41,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:21:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:21:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:21:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:21:41,547 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2020-12-22 04:21:41,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:21:41,598 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-12-22 04:21:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:21:41,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 04:21:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:21:41,599 INFO L225 Difference]: With dead ends: 10 [2020-12-22 04:21:41,599 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:21:41,601 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 [2020-12-22 04:21:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:21:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:21:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:21:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:21:41,602 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-12-22 04:21:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:21:41,602 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:21:41,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:21:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:21:41,603 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:21:41,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:21:41,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:21:41,625 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:21:41,626 INFO L189 CegarLoopUtils]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-12-22 04:21:41,626 INFO L189 CegarLoopUtils]: For program point L23-2(lines 22 24) no Hoare annotation was computed. [2020-12-22 04:21:41,626 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-22 04:21:41,626 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:21:41,627 INFO L192 CegarLoopUtils]: At program point L30(lines 14 31) the Hoare annotation is: true [2020-12-22 04:21:41,627 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:21:41,627 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:21:41,627 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-22 04:21:41,628 INFO L189 CegarLoopUtils]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-12-22 04:21:41,628 INFO L192 CegarLoopUtils]: At program point L20-2(lines 20 27) the Hoare annotation is: true [2020-12-22 04:21:41,628 INFO L189 CegarLoopUtils]: For program point L20-3(lines 20 27) no Hoare annotation was computed. [2020-12-22 04:21:41,628 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-22 04:21:41,628 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-12-22 04:21:41,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:21:41 BoogieIcfgContainer [2020-12-22 04:21:41,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:21:41,650 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:21:41,650 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:21:41,650 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:21:41,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:21:40" (3/4) ... [2020-12-22 04:21:41,656 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:21:41,669 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-22 04:21:41,670 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:21:41,670 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:21:41,670 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:21:41,734 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/trex03-2.c-witness.graphml [2020-12-22 04:21:41,740 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:21:41,743 INFO L168 Benchmark]: Toolchain (without parser) took 1578.84 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 103.6 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,744 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:21:41,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,746 INFO L168 Benchmark]: Boogie Preprocessor took 23.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.3 MB in the end (delta: 974.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,747 INFO L168 Benchmark]: RCFGBuilder took 363.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 101.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,748 INFO L168 Benchmark]: TraceAbstraction took 800.42 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 106.2 MB in the end (delta: 27.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,750 INFO L168 Benchmark]: Witness Printer took 90.52 ms. Allocated memory is still 151.0 MB. Free memory was 106.2 MB in the beginning and 103.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:21:41,760 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 was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.53 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.3 MB in the end (delta: 974.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 363.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 101.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 800.42 ms. Allocated memory is still 151.0 MB. Free memory was 134.0 MB in the beginning and 106.2 MB in the end (delta: 27.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * Witness Printer took 90.52 ms. Allocated memory is still 151.0 MB. Free memory was 106.2 MB in the beginning and 103.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 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: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 1 SDslu, 12 SDs, 0 SdLazy, 6 SolverSat, 0 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=14occurred 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, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 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, 170 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...