/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:56:37,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:56:37,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:56:37,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:56:37,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:56:37,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:56:37,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:56:37,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:56:37,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:56:37,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:56:37,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:56:37,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:56:37,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:56:37,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:56:37,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:56:37,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:56:37,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:56:37,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:56:37,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:56:37,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:56:37,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:56:37,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:56:37,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:56:37,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:56:37,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:56:37,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:56:37,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:56:37,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:56:37,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:56:38,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:56:38,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:56:38,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:56:38,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:56:38,053 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:56:38,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:56:38,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:56:38,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:56:38,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:56:38,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:56:38,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:56:38,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:56:38,056 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:56:38,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:56:38,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:56:38,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:56:38,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:56:38,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:56:38,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:56:38,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:56:38,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:56:38,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:56:38,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:56:38,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:56:38,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:56:38,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:56:38,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:56:38,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:56:38,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:56:38,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:56:38,487 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:56:38,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/ddlm2013.i [2020-12-23 06:56:38,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b9231ed4c/afd8941acf3146819c60a578baa65b63/FLAG597577b07 [2020-12-23 06:56:39,275 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:56:39,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i [2020-12-23 06:56:39,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b9231ed4c/afd8941acf3146819c60a578baa65b63/FLAG597577b07 [2020-12-23 06:56:39,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b9231ed4c/afd8941acf3146819c60a578baa65b63 [2020-12-23 06:56:39,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:56:39,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:56:39,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:56:39,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:56:39,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:56:39,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed90231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39, skipping insertion in model container [2020-12-23 06:56:39,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:56:39,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:56:39,821 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:56:39,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:56:39,857 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:56:39,874 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/ddlm2013.i[895,908] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:56:39,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:56:39,900 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:56:39,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39 WrapperNode [2020-12-23 06:56:39,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:56:39,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:56:39,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:56:39,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:56:39,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:56:39,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:56:39,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:56:39,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:56:39,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... [2020-12-23 06:56:39,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:56:39,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:56:39,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:56:39,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:56:39,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:56:40,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:56:40,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:56:40,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:56:40,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:56:40,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:56:40,378 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:56:40,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:56:40 BoogieIcfgContainer [2020-12-23 06:56:40,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:56:40,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:56:40,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:56:40,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:56:40,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:56:39" (1/3) ... [2020-12-23 06:56:40,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad05c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:56:40, skipping insertion in model container [2020-12-23 06:56:40,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:56:39" (2/3) ... [2020-12-23 06:56:40,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad05c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:56:40, skipping insertion in model container [2020-12-23 06:56:40,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:56:40" (3/3) ... [2020-12-23 06:56:40,412 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-12-23 06:56:40,429 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:56:40,442 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:56:40,508 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:56:40,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:56:40,582 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:56:40,582 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:56:40,582 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:56:40,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:56:40,583 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:56:40,583 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:56:40,583 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:56:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-23 06:56:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:56:40,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:40,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:40,626 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1805459912, now seen corresponding path program 1 times [2020-12-23 06:56:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:40,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658161515] [2020-12-23 06:56:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:40,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658161515] [2020-12-23 06:56:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:56:40,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:56:40,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341929490] [2020-12-23 06:56:40,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:56:40,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:56:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:56:40,913 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-23 06:56:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:40,936 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-12-23 06:56:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:56:40,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 06:56:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:40,969 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:56:40,970 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:56:40,973 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 [2020-12-23 06:56:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:56:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:56:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:56:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-23 06:56:41,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-23 06:56:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:41,017 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-23 06:56:41,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:56:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-23 06:56:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:56:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:41,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:41,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:56:41,019 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:41,024 INFO L82 PathProgramCache]: Analyzing trace with hash 122256666, now seen corresponding path program 1 times [2020-12-23 06:56:41,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229439287] [2020-12-23 06:56:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:41,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229439287] [2020-12-23 06:56:41,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:56:41,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:56:41,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022576319] [2020-12-23 06:56:41,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:56:41,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:41,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:56:41,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:56:41,296 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2020-12-23 06:56:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:41,336 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 06:56:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:56:41,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 06:56:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:41,338 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:56:41,338 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:56:41,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:56:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:56:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 06:56:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:56:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 06:56:41,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2020-12-23 06:56:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:41,344 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 06:56:41,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:56:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 06:56:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:56:41,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:41,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:41,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:56:41,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:41,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1514407247, now seen corresponding path program 1 times [2020-12-23 06:56:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254604844] [2020-12-23 06:56:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:41,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254604844] [2020-12-23 06:56:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970471310] [2020-12-23 06:56:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:56:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:41,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:41,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-12-23 06:56:41,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713217140] [2020-12-23 06:56:41,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:56:41,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:56:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:56:41,966 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 9 states. [2020-12-23 06:56:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:42,134 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-23 06:56:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:56:42,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 06:56:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:42,140 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:56:42,140 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 06:56:42,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:56:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 06:56:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-12-23 06:56:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:56:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 06:56:42,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2020-12-23 06:56:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:42,157 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 06:56:42,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:56:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 06:56:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:56:42,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:42,159 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:42,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:56:42,373 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2100501679, now seen corresponding path program 1 times [2020-12-23 06:56:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038696992] [2020-12-23 06:56:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:56:42,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038696992] [2020-12-23 06:56:42,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:56:42,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:56:42,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861740569] [2020-12-23 06:56:42,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:56:42,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:56:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:56:42,470 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-23 06:56:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:42,480 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-23 06:56:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:56:42,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-23 06:56:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:42,484 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:56:42,484 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:56:42,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:56:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:56:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:56:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:56:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 06:56:42,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-12-23 06:56:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:42,490 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 06:56:42,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:56:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 06:56:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:56:42,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:42,491 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:42,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:56:42,492 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1426811654, now seen corresponding path program 2 times [2020-12-23 06:56:42,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:42,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969653593] [2020-12-23 06:56:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969653593] [2020-12-23 06:56:42,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370727239] [2020-12-23 06:56:42,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-23 06:56:42,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:56:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:43,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:43,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 06:56:43,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323968191] [2020-12-23 06:56:43,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:56:43,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:43,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:56:43,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:56:43,097 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 12 states. [2020-12-23 06:56:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:43,194 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-12-23 06:56:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:56:43,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 06:56:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:43,196 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:56:43,196 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:56:43,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:56:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:56:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 06:56:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:56:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 06:56:43,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-12-23 06:56:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:43,201 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 06:56:43,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:56:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 06:56:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:56:43,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:43,202 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:43,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:43,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1651285649, now seen corresponding path program 3 times [2020-12-23 06:56:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:43,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357524840] [2020-12-23 06:56:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:43,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357524840] [2020-12-23 06:56:43,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214165785] [2020-12-23 06:56:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:56:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:56:43,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:44,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:44,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 06:56:44,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305093493] [2020-12-23 06:56:44,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:56:44,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:44,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:56:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:56:44,072 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2020-12-23 06:56:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:44,443 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-12-23 06:56:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:56:44,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-12-23 06:56:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:44,444 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:56:44,445 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:56:44,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:56:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:56:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-23 06:56:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:56:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 06:56:44,450 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-12-23 06:56:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:44,450 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 06:56:44,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:56:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 06:56:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:56:44,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:44,451 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:44,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:44,665 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1011932452, now seen corresponding path program 1 times [2020-12-23 06:56:44,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:44,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470314460] [2020-12-23 06:56:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:56:44,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470314460] [2020-12-23 06:56:44,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555173073] [2020-12-23 06:56:44,778 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:56:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:56:44,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:44,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:56:44,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908765666] [2020-12-23 06:56:44,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:56:44,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:56:44,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:56:44,911 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-12-23 06:56:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:44,957 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 06:56:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:56:44,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 06:56:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:44,958 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:56:44,958 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:56:44,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:56:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:56:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:56:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:56:44,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:56:44,962 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2020-12-23 06:56:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:44,963 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:56:44,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:56:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:56:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:56:44,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:44,964 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:45,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:45,178 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391558, now seen corresponding path program 4 times [2020-12-23 06:56:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013063114] [2020-12-23 06:56:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013063114] [2020-12-23 06:56:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626223987] [2020-12-23 06:56:45,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:45,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:56:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:46,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:46,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2020-12-23 06:56:46,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025175022] [2020-12-23 06:56:46,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:56:46,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:56:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:56:46,207 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 28 states. [2020-12-23 06:56:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:46,861 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 06:56:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:56:46,861 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2020-12-23 06:56:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:46,862 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:56:46,862 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:56:46,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:56:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:56:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:56:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:56:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:56:46,864 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-12-23 06:56:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:46,864 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:56:46,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:56:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:56:46,864 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:56:47,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:47,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:56:47,095 INFO L189 CegarLoopUtils]: For program point L35-2(lines 24 49) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L192 CegarLoopUtils]: At program point L48(lines 24 49) the Hoare annotation is: true [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point L30(lines 30 34) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:56:47,096 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-23 06:56:47,097 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-23 06:56:47,097 INFO L192 CegarLoopUtils]: At program point L45(lines 45 47) the Hoare annotation is: true [2020-12-23 06:56:47,097 INFO L189 CegarLoopUtils]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-12-23 06:56:47,097 INFO L189 CegarLoopUtils]: For program point L39-2(lines 24 49) no Hoare annotation was computed. [2020-12-23 06:56:47,097 INFO L189 CegarLoopUtils]: For program point L35(lines 35 44) no Hoare annotation was computed. [2020-12-23 06:56:47,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:56:47 BoogieIcfgContainer [2020-12-23 06:56:47,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:56:47,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:56:47,108 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:56:47,108 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:56:47,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:56:40" (3/4) ... [2020-12-23 06:56:47,111 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:56:47,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-23 06:56:47,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:56:47,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:56:47,123 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:56:47,173 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-lit/ddlm2013.i-witness.graphml [2020-12-23 06:56:47,173 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:56:47,177 INFO L168 Benchmark]: Toolchain (without parser) took 7560.62 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.4 MB in the beginning and 91.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,178 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.7 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:56:47,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,182 INFO L168 Benchmark]: Boogie Preprocessor took 25.29 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,183 INFO L168 Benchmark]: RCFGBuilder took 407.69 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 102.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,184 INFO L168 Benchmark]: TraceAbstraction took 6715.91 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.0 MB in the beginning and 94.4 MB in the end (delta: 39.6 MB). Peak memory consumption was 70.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,185 INFO L168 Benchmark]: Witness Printer took 65.13 ms. Allocated memory is still 181.4 MB. Free memory was 94.4 MB in the beginning and 91.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:56:47,192 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.7 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.29 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.69 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 102.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6715.91 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.0 MB in the beginning and 94.4 MB in the end (delta: 39.6 MB). Peak memory consumption was 70.0 MB. Max. memory is 8.0 GB. * Witness Printer took 65.13 ms. Allocated memory is still 181.4 MB. Free memory was 94.4 MB in the beginning and 91.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 45]: 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: 6.5s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 61 SDslu, 376 SDs, 0 SdLazy, 487 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 40628 SizeOfPredicates, 17 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 36/216 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...