/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/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:22:08,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:22:08,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:22:08,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:22:08,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:22:08,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:22:08,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:22:08,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:22:08,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:22:08,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:22:08,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:22:08,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:22:08,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:22:08,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:22:08,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:22:08,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:22:08,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:22:08,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:22:08,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:22:08,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:22:08,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:22:08,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:22:08,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:22:08,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:22:08,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:22:08,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:22:08,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:22:08,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:22:08,775 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 19:22:08,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:22:08,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:22:08,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:22:08,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:22:08,815 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:22:08,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:22:08,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:22:08,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:22:08,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:22:08,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:22:08,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:22:08,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:22:08,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:22:08,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:22:08,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:22:08,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:22:08,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:22:08,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:22:08,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:22:08,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:22:08,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:22:08,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:22:08,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:22:08,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:22:08,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:22:08,823 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:22:09,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:22:09,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:22:09,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:22:09,285 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:22:09,286 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:22:09,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-01-06 19:22:09,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c885c35c7/cca42d119f0848c882a697e73acdda5f/FLAG0f33a06d4 [2021-01-06 19:22:10,101 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:22:10,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-01-06 19:22:10,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c885c35c7/cca42d119f0848c882a697e73acdda5f/FLAG0f33a06d4 [2021-01-06 19:22:10,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c885c35c7/cca42d119f0848c882a697e73acdda5f [2021-01-06 19:22:10,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:22:10,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:22:10,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:22:10,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:22:10,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:22:10,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e655fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10, skipping insertion in model container [2021-01-06 19:22:10,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:22:10,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:22:10,633 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/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-01-06 19:22:10,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:22:10,672 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:22:10,687 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/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-01-06 19:22:10,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:22:10,719 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:22:10,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10 WrapperNode [2021-01-06 19:22:10,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:22:10,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:22:10,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:22:10,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:22:10,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:22:10,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:22:10,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:22:10,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:22:10,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (1/1) ... [2021-01-06 19:22:10,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:22:10,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:22:10,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:22:10,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:22:10,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (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 19:22:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:22:10,951 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-01-06 19:22:10,952 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-01-06 19:22:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:22:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 19:22:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:22:10,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:22:10,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 19:22:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 19:22:11,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:22:11,416 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-01-06 19:22:11,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:22:11 BoogieIcfgContainer [2021-01-06 19:22:11,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:22:11,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:22:11,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:22:11,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:22:11,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:22:10" (1/3) ... [2021-01-06 19:22:11,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496a4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:22:11, skipping insertion in model container [2021-01-06 19:22:11,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:22:10" (2/3) ... [2021-01-06 19:22:11,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6496a4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:22:11, skipping insertion in model container [2021-01-06 19:22:11,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:22:11" (3/3) ... [2021-01-06 19:22:11,446 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-01-06 19:22:11,460 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:22:11,474 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 19:22:11,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 19:22:11,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:22:11,583 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:22:11,583 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:22:11,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:22:11,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:22:11,586 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:22:11,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:22:11,587 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:22:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-01-06 19:22:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 19:22:11,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:11,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:11,631 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1674755782, now seen corresponding path program 1 times [2021-01-06 19:22:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:11,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389698018] [2021-01-06 19:22:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:11,827 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 19:22:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389698018] [2021-01-06 19:22:11,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:22:11,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:22:11,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623824948] [2021-01-06 19:22:11,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:22:11,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:22:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:22:11,854 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-01-06 19:22:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:11,883 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-01-06 19:22:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:22:11,884 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 19:22:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:11,894 INFO L225 Difference]: With dead ends: 63 [2021-01-06 19:22:11,895 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 19:22:11,899 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 19:22:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 19:22:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 19:22:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 19:22:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-06 19:22:11,946 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2021-01-06 19:22:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:11,947 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-06 19:22:11,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:22:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-06 19:22:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 19:22:11,949 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:11,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:11,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:22:11,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:11,951 INFO L82 PathProgramCache]: Analyzing trace with hash 472382146, now seen corresponding path program 1 times [2021-01-06 19:22:11,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:11,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768766743] [2021-01-06 19:22:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,151 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 19:22:12,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768766743] [2021-01-06 19:22:12,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:22:12,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:22:12,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174347149] [2021-01-06 19:22:12,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:22:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:22:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:22:12,156 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2021-01-06 19:22:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:12,335 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-01-06 19:22:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:22:12,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 19:22:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:12,339 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:22:12,339 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 19:22:12,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:22:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 19:22:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2021-01-06 19:22:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 19:22:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-01-06 19:22:12,356 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 12 [2021-01-06 19:22:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:12,356 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-01-06 19:22:12,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:22:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-01-06 19:22:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 19:22:12,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:12,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:12,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:22:12,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:12,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1870344237, now seen corresponding path program 1 times [2021-01-06 19:22:12,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:12,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818380473] [2021-01-06 19:22:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-01-06 19:22:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,616 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 19:22:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818380473] [2021-01-06 19:22:12,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:22:12,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:22:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105305227] [2021-01-06 19:22:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:22:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:22:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:22:12,620 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2021-01-06 19:22:12,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:12,694 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-01-06 19:22:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:22:12,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 19:22:12,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:12,702 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:22:12,702 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:22:12,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:22:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:22:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:22:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:22:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-01-06 19:22:12,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 15 [2021-01-06 19:22:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:12,722 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-01-06 19:22:12,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:22:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-01-06 19:22:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 19:22:12,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:12,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:12,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:22:12,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash -182584484, now seen corresponding path program 1 times [2021-01-06 19:22:12,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094167811] [2021-01-06 19:22:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:22:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094167811] [2021-01-06 19:22:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68024886] [2021-01-06 19:22:12,965 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 19:22:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:22:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:22:13,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:13,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 19:22:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033054446] [2021-01-06 19:22:13,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:22:13,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:22:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:22:13,228 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2021-01-06 19:22:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:13,495 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-01-06 19:22:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:22:13,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 19:22:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:13,498 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:22:13,498 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 19:22:13,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:22:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 19:22:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 23. [2021-01-06 19:22:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 19:22:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 19:22:13,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-01-06 19:22:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:13,506 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 19:22:13,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:22:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 19:22:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 19:22:13,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:13,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:13,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:13,722 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1944692544, now seen corresponding path program 1 times [2021-01-06 19:22:13,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:13,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294597260] [2021-01-06 19:22:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-01-06 19:22:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:22:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294597260] [2021-01-06 19:22:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668885385] [2021-01-06 19:22:13,837 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 19:22:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:13,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-06 19:22:13,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 19:22:14,002 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 19:22:14,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 19:22:14,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2021-01-06 19:22:14,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 19:22:14,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 19:22:14,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 19:22:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:22:14,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:14,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 15 [2021-01-06 19:22:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996392001] [2021-01-06 19:22:14,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:22:14,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:22:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:22:14,197 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 15 states. [2021-01-06 19:22:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:16,440 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-01-06 19:22:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:22:16,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2021-01-06 19:22:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:16,441 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:22:16,441 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:22:16,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:22:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:22:16,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:22:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:22:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:22:16,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-01-06 19:22:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:16,444 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:22:16,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:22:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:22:16,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:22:16,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:16,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:22:16,842 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:22:16,842 INFO L189 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,842 INFO L189 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,842 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point L7-1(lines 7 9) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point L-1-1(line -1) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:22:16,843 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,844 INFO L192 CegarLoopUtils]: At program point L53(lines 40 54) the Hoare annotation is: true [2021-01-06 19:22:16,844 INFO L185 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= 0 ULTIMATE.start_main_~n~0) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc17.base|)) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0))) [2021-01-06 19:22:16,844 INFO L189 CegarLoopUtils]: For program point L47-1(line 47) no Hoare annotation was computed. [2021-01-06 19:22:16,844 INFO L189 CegarLoopUtils]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-01-06 19:22:16,844 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L192 CegarLoopUtils]: At program point checkENTRY(lines 16 38) the Hoare annotation is: true [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,845 INFO L189 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point L11-3(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point L11-4(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point checkFINAL(lines 16 38) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-01-06 19:22:16,846 INFO L189 CegarLoopUtils]: For program point L26(lines 26 27) no Hoare annotation was computed. [2021-01-06 19:22:16,847 INFO L185 CegarLoopUtils]: At program point L26-2(lines 26 27) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (let ((.cse0 (= check___VERIFIER_assert_~cond 1)) (.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse0 .cse1 (<= 1 check_~x)) (and .cse0 (= |check_#in~x| 0) .cse1))) (<= 0 check_~x) (= (select |#memory_int| check_~a.base) .cse2)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)))) [2021-01-06 19:22:16,847 INFO L189 CegarLoopUtils]: For program point checkEXIT(lines 16 38) no Hoare annotation was computed. [2021-01-06 19:22:16,847 INFO L189 CegarLoopUtils]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-01-06 19:22:16,847 INFO L189 CegarLoopUtils]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-01-06 19:22:16,847 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-01-06 19:22:16,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:22:16 BoogieIcfgContainer [2021-01-06 19:22:16,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:22:16,860 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:22:16,860 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:22:16,860 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:22:16,861 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:22:11" (3/4) ... [2021-01-06 19:22:16,865 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:22:16,873 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-01-06 19:22:16,879 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-01-06 19:22:16,880 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-06 19:22:16,880 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-01-06 19:22:16,880 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:22:16,938 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec_onepoint.c-witness.graphml [2021-01-06 19:22:16,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:22:16,940 INFO L168 Benchmark]: Toolchain (without parser) took 6515.27 ms. Allocated memory was 160.4 MB in the beginning and 207.6 MB in the end (delta: 47.2 MB). Free memory was 142.1 MB in the beginning and 86.9 MB in the end (delta: 55.3 MB). Peak memory consumption was 102.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,940 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:22:16,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.61 ms. Allocated memory is still 160.4 MB. Free memory was 141.9 MB in the beginning and 131.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,941 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.92 ms. Allocated memory is still 160.4 MB. Free memory was 131.6 MB in the beginning and 129.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,942 INFO L168 Benchmark]: Boogie Preprocessor took 29.79 ms. Allocated memory is still 160.4 MB. Free memory was 129.8 MB in the beginning and 128.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,942 INFO L168 Benchmark]: RCFGBuilder took 617.53 ms. Allocated memory is still 160.4 MB. Free memory was 128.4 MB in the beginning and 126.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,943 INFO L168 Benchmark]: TraceAbstraction took 5434.29 ms. Allocated memory was 160.4 MB in the beginning and 207.6 MB in the end (delta: 47.2 MB). Free memory was 125.9 MB in the beginning and 90.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,944 INFO L168 Benchmark]: Witness Printer took 78.67 ms. Allocated memory is still 207.6 MB. Free memory was 90.0 MB in the beginning and 86.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:22:16,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 133.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.61 ms. Allocated memory is still 160.4 MB. Free memory was 141.9 MB in the beginning and 131.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 51.92 ms. Allocated memory is still 160.4 MB. Free memory was 131.6 MB in the beginning and 129.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.79 ms. Allocated memory is still 160.4 MB. Free memory was 129.8 MB in the beginning and 128.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 617.53 ms. Allocated memory is still 160.4 MB. Free memory was 128.4 MB in the beginning and 126.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5434.29 ms. Allocated memory was 160.4 MB in the beginning and 207.6 MB in the end (delta: 47.2 MB). Free memory was 125.9 MB in the beginning and 90.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. * Witness Printer took 78.67 ms. Allocated memory is still 207.6 MB. Free memory was 90.0 MB in the beginning and 86.9 MB in the end (delta: 3.1 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: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: 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 3 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 33 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 209 SDslu, 284 SDs, 0 SdLazy, 260 SolverSat, 78 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 71 HoareAnnotationTreeSize, 10 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 137 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 118 ConstructedInterpolants, 4 QuantifiedInterpolants, 9574 SizeOfPredicates, 27 NumberOfNonLiveVariables, 321 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 2/10 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...