/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:57:11,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:57:11,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:57:11,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:57:11,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:57:11,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:57:11,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:57:11,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:57:11,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:57:11,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:57:11,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:57:11,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 17:57:12,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 17:57:12,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:57:12,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:57:12,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:57:12,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:57:12,062 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:57:12,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:57:12,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:57:12,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:57:12,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:57:12,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:57:12,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:57:12,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:57:12,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:57:12,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:57:12,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:57:12,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:57:12,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:57:12,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:57:12,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:57:12,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:57:12,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:57:12,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:12,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:57:12,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:57:12,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:57:12,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:57:12,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:57:12,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:57:12,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:57:12,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:57:12,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:57:12,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:57:12,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:57:12,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:57:12,555 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:57:12,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-10-23 17:57:12,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf13eb6a/8bd6971681b1471a9a7f6c3efc42f2a9/FLAG539c2a60b [2020-10-23 17:57:13,373 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:57:13,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-10-23 17:57:13,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf13eb6a/8bd6971681b1471a9a7f6c3efc42f2a9/FLAG539c2a60b [2020-10-23 17:57:13,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf13eb6a/8bd6971681b1471a9a7f6c3efc42f2a9 [2020-10-23 17:57:13,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:57:13,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:57:13,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:13,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:57:13,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:57:13,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:13" (1/1) ... [2020-10-23 17:57:13,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33014f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:13, skipping insertion in model container [2020-10-23 17:57:13,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:13" (1/1) ... [2020-10-23 17:57:13,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:57:13,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:57:13,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:14,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:57:14,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:14,071 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:57:14,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14 WrapperNode [2020-10-23 17:57:14,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:14,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:57:14,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:57:14,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:57:14,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... [2020-10-23 17:57:14,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:57:14,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:57:14,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:57:14,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:57:14,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:14,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:57:14,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:57:14,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:57:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-10-23 17:57:14,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:57:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:57:14,269 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:57:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:57:14,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:57:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:57:14,271 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-10-23 17:57:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:57:14,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:57:14,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:57:14,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:57:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:57:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:57:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:57:14,864 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:57:14,865 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:57:14,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:14 BoogieIcfgContainer [2020-10-23 17:57:14,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:57:14,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:57:14,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:57:14,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:57:14,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:13" (1/3) ... [2020-10-23 17:57:14,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e34f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:14, skipping insertion in model container [2020-10-23 17:57:14,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:14" (2/3) ... [2020-10-23 17:57:14,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e34f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:14, skipping insertion in model container [2020-10-23 17:57:14,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:14" (3/3) ... [2020-10-23 17:57:14,881 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-10-23 17:57:14,895 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:57:14,901 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:57:14,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:57:14,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:57:14,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:57:14,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:57:14,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:57:14,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:57:14,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:57:14,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:57:14,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:57:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 17:57:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 17:57:14,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:14,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:14,985 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash 192942640, now seen corresponding path program 1 times [2020-10-23 17:57:15,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:15,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032342262] [2020-10-23 17:57:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:57:15,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032342262] [2020-10-23 17:57:15,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:15,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 17:57:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205175077] [2020-10-23 17:57:15,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:57:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:57:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 17:57:15,433 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-10-23 17:57:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:16,152 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-10-23 17:57:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:57:16,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-23 17:57:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:16,167 INFO L225 Difference]: With dead ends: 61 [2020-10-23 17:57:16,167 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 17:57:16,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 17:57:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 17:57:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 17:57:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-23 17:57:16,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-10-23 17:57:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:16,243 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-23 17:57:16,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:57:16,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-23 17:57:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 17:57:16,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:16,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:16,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:57:16,248 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1691639833, now seen corresponding path program 1 times [2020-10-23 17:57:16,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:16,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771429494] [2020-10-23 17:57:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 17:57:16,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771429494] [2020-10-23 17:57:16,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168163795] [2020-10-23 17:57:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 17:57:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 17:57:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 17:57:16,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:16,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-23 17:57:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372802976] [2020-10-23 17:57:16,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:57:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:57:16,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:16,793 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2020-10-23 17:57:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:17,116 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2020-10-23 17:57:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:57:17,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-23 17:57:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:17,120 INFO L225 Difference]: With dead ends: 55 [2020-10-23 17:57:17,120 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 17:57:17,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 17:57:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 17:57:17,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 17:57:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 17:57:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-10-23 17:57:17,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 24 [2020-10-23 17:57:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:17,138 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-10-23 17:57:17,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:57:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-10-23 17:57:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 17:57:17,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:17,145 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:17,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 17:57:17,347 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash 936683835, now seen corresponding path program 1 times [2020-10-23 17:57:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:17,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511621298] [2020-10-23 17:57:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 17:57:17,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511621298] [2020-10-23 17:57:17,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898403274] [2020-10-23 17:57:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 17:57:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 17:57:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 17:57:17,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:17,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 17:57:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927965224] [2020-10-23 17:57:17,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:57:17,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:57:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:17,708 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 9 states. [2020-10-23 17:57:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:18,397 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2020-10-23 17:57:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 17:57:18,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-23 17:57:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:18,402 INFO L225 Difference]: With dead ends: 80 [2020-10-23 17:57:18,402 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 17:57:18,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-23 17:57:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 17:57:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-23 17:57:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 17:57:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 81 transitions. [2020-10-23 17:57:18,423 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 81 transitions. Word has length 37 [2020-10-23 17:57:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:18,424 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 81 transitions. [2020-10-23 17:57:18,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:57:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 81 transitions. [2020-10-23 17:57:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 17:57:18,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:18,428 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:18,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:18,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1370575681, now seen corresponding path program 2 times [2020-10-23 17:57:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878387597] [2020-10-23 17:57:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-23 17:57:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878387597] [2020-10-23 17:57:18,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141858091] [2020-10-23 17:57:18,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 17:57:19,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:19,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 17:57:19,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-23 17:57:19,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:19,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 17:57:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065898037] [2020-10-23 17:57:19,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:57:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:57:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:19,147 INFO L87 Difference]: Start difference. First operand 55 states and 81 transitions. Second operand 9 states. [2020-10-23 17:57:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:19,817 INFO L93 Difference]: Finished difference Result 126 states and 233 transitions. [2020-10-23 17:57:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:57:19,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-23 17:57:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:19,821 INFO L225 Difference]: With dead ends: 126 [2020-10-23 17:57:19,821 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 17:57:19,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:57:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 17:57:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-23 17:57:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 17:57:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2020-10-23 17:57:19,853 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 50 [2020-10-23 17:57:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:19,854 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2020-10-23 17:57:19,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:57:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2020-10-23 17:57:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-23 17:57:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:19,861 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:20,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:20,075 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -69170412, now seen corresponding path program 3 times [2020-10-23 17:57:20,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:20,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812372886] [2020-10-23 17:57:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:57:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-23 17:57:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 148 proven. 218 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-23 17:57:20,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812372886] [2020-10-23 17:57:20,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628667997] [2020-10-23 17:57:20,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 17:57:20,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-23 17:57:20,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 17:57:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 182 proven. 101 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-10-23 17:57:21,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:21,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2020-10-23 17:57:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520151314] [2020-10-23 17:57:21,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 17:57:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:21,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 17:57:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:57:21,148 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand 20 states. [2020-10-23 17:57:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:24,402 INFO L93 Difference]: Finished difference Result 132 states and 259 transitions. [2020-10-23 17:57:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 17:57:24,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-10-23 17:57:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:24,414 INFO L225 Difference]: With dead ends: 132 [2020-10-23 17:57:24,414 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 17:57:24,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 17:57:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 17:57:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-23 17:57:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 17:57:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2020-10-23 17:57:24,462 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 124 [2020-10-23 17:57:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:24,463 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2020-10-23 17:57:24,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 17:57:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2020-10-23 17:57:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 17:57:24,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:24,466 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:24,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:24,680 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1938812884, now seen corresponding path program 4 times [2020-10-23 17:57:24,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:24,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90256955] [2020-10-23 17:57:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:57:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:24,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 17:57:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 250 proven. 107 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-10-23 17:57:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90256955] [2020-10-23 17:57:25,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268713913] [2020-10-23 17:57:25,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 17:57:25,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 17:57:25,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 17:57:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-10-23 17:57:25,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:25,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2020-10-23 17:57:25,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522425829] [2020-10-23 17:57:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 17:57:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 17:57:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:25,518 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand 19 states. [2020-10-23 17:57:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:28,316 INFO L93 Difference]: Finished difference Result 201 states and 398 transitions. [2020-10-23 17:57:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 17:57:28,317 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 123 [2020-10-23 17:57:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:28,322 INFO L225 Difference]: With dead ends: 201 [2020-10-23 17:57:28,322 INFO L226 Difference]: Without dead ends: 114 [2020-10-23 17:57:28,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=577, Invalid=2075, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 17:57:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-23 17:57:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-23 17:57:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 17:57:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 157 transitions. [2020-10-23 17:57:28,356 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 157 transitions. Word has length 123 [2020-10-23 17:57:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:28,356 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 157 transitions. [2020-10-23 17:57:28,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 17:57:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 157 transitions. [2020-10-23 17:57:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-23 17:57:28,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:28,360 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:28,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 17:57:28,573 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:28,574 INFO L82 PathProgramCache]: Analyzing trace with hash 817501940, now seen corresponding path program 5 times [2020-10-23 17:57:28,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:28,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351534502] [2020-10-23 17:57:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:57:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:28,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-23 17:57:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-10-23 17:57:29,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351534502] [2020-10-23 17:57:29,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252638391] [2020-10-23 17:57:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:29,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-23 17:57:29,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:29,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-23 17:57:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-10-23 17:57:29,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:29,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 25 [2020-10-23 17:57:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472943016] [2020-10-23 17:57:29,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 17:57:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 17:57:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-23 17:57:29,856 INFO L87 Difference]: Start difference. First operand 105 states and 157 transitions. Second operand 25 states. [2020-10-23 17:57:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:33,094 INFO L93 Difference]: Finished difference Result 230 states and 405 transitions. [2020-10-23 17:57:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 17:57:33,095 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 162 [2020-10-23 17:57:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:33,104 INFO L225 Difference]: With dead ends: 230 [2020-10-23 17:57:33,104 INFO L226 Difference]: Without dead ends: 138 [2020-10-23 17:57:33,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=671, Invalid=3111, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 17:57:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-23 17:57:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2020-10-23 17:57:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 17:57:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-10-23 17:57:33,197 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 162 [2020-10-23 17:57:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:33,200 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-10-23 17:57:33,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 17:57:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-10-23 17:57:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-23 17:57:33,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:33,205 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:33,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:33,419 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash 282891340, now seen corresponding path program 6 times [2020-10-23 17:57:33,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:33,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760163187] [2020-10-23 17:57:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:57:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-23 17:57:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:33,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:57:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-23 17:57:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-10-23 17:57:34,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760163187] [2020-10-23 17:57:34,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084155724] [2020-10-23 17:57:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:34,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-23 17:57:34,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 17:57:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-10-23 17:57:34,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:34,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 27 [2020-10-23 17:57:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17991287] [2020-10-23 17:57:34,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 17:57:34,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:34,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 17:57:34,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-10-23 17:57:34,755 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 27 states. [2020-10-23 17:57:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:37,725 INFO L93 Difference]: Finished difference Result 186 states and 322 transitions. [2020-10-23 17:57:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-23 17:57:37,726 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-10-23 17:57:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:37,731 INFO L225 Difference]: With dead ends: 186 [2020-10-23 17:57:37,731 INFO L226 Difference]: Without dead ends: 181 [2020-10-23 17:57:37,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=686, Invalid=3096, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 17:57:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-23 17:57:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2020-10-23 17:57:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 17:57:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 247 transitions. [2020-10-23 17:57:37,773 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 247 transitions. Word has length 188 [2020-10-23 17:57:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:37,774 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 247 transitions. [2020-10-23 17:57:37,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 17:57:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 247 transitions. [2020-10-23 17:57:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-23 17:57:37,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:37,780 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:37,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:37,995 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1916267924, now seen corresponding path program 7 times [2020-10-23 17:57:37,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087957348] [2020-10-23 17:57:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-23 17:57:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:57:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-23 17:57:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 17:57:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:57:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:57:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:57:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-10-23 17:57:38,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087957348] [2020-10-23 17:57:38,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305682628] [2020-10-23 17:57:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-23 17:57:39,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-10-23 17:57:39,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:39,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 26 [2020-10-23 17:57:39,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612257] [2020-10-23 17:57:39,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 17:57:39,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 17:57:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-23 17:57:39,267 INFO L87 Difference]: Start difference. First operand 143 states and 247 transitions. Second operand 26 states. [2020-10-23 17:57:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:42,853 INFO L93 Difference]: Finished difference Result 287 states and 578 transitions. [2020-10-23 17:57:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 17:57:42,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2020-10-23 17:57:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:42,856 INFO L225 Difference]: With dead ends: 287 [2020-10-23 17:57:42,856 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 17:57:42,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 17:57:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 17:57:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 17:57:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 17:57:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 17:57:42,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 175 [2020-10-23 17:57:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 17:57:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 17:57:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 17:57:42,864 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 17:57:43,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 17:57:43,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 17:57:43,741 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:43,937 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 88 [2020-10-23 17:57:44,146 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:44,334 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 85 [2020-10-23 17:57:44,510 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 85 [2020-10-23 17:57:44,680 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:44,845 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:45,664 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:46,024 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:46,160 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-10-23 17:57:46,837 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 14 [2020-10-23 17:57:48,601 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 130 DAG size of output: 44 [2020-10-23 17:57:48,872 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-10-23 17:57:48,945 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 17:57:48,946 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 17:57:48,946 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 17:57:48,946 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 17:57:48,947 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:57:48,947 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 17:57:48,947 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:57:48,947 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 17:57:48,947 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 17:57:48,947 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 27 47) the Hoare annotation is: true [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 27 47) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L270 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: false [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 27 47) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point L45-1(line 45) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L274 CegarLoopResult]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-10-23 17:57:48,948 INFO L277 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: true [2020-10-23 17:57:48,949 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-10-23 17:57:48,949 INFO L274 CegarLoopResult]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-10-23 17:57:48,949 INFO L274 CegarLoopResult]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-10-23 17:57:48,949 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (or (not (<= |ackermann_#in~n| 1)) (not (= |ackermann_#in~m| 0))) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-10-23 17:57:48,949 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-23 17:57:48,949 INFO L277 CegarLoopResult]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-10-23 17:57:48,949 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2020-10-23 17:57:48,950 INFO L270 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|)) (.cse2 (<= 5 |ackermann_#t~ret8|)) (.cse3 (<= 6 |ackermann_#t~ret8|)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse4 (<= 1 |ackermann_#in~m|)) (.cse5 (= |ackermann_#in~m| 0))) (and (or (= |ackermann_#in~n| 1) (and (<= |ackermann_#in~n| 2) .cse0) (and .cse1 .cse2 (<= |ackermann_#in~n| 4)) .cse3 (and .cse1 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret8|)) (not .cse4)) (or (not (<= |ackermann_#in~n| 0)) .cse5) (let ((.cse8 (<= 2 |ackermann_#in~m|)) (.cse6 (= ackermann_~n |ackermann_#in~n|)) (.cse7 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~n| 1) .cse0 .cse6 .cse7 .cse8) (and (<= |ackermann_#in~m| 2) .cse2 .cse6 .cse7 .cse8) (and .cse3 .cse6 .cse7 .cse8) (and .cse1 (<= 2 |ackermann_#t~ret8|) .cse6 .cse4 .cse7) (and .cse6 .cse7 .cse5))))) [2020-10-23 17:57:48,950 INFO L274 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-10-23 17:57:48,950 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-10-23 17:57:48,950 INFO L274 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-10-23 17:57:48,950 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-23 17:57:48,950 INFO L274 CegarLoopResult]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-10-23 17:57:48,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:57:48 BoogieIcfgContainer [2020-10-23 17:57:48,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:57:48,958 INFO L168 Benchmark]: Toolchain (without parser) took 35195.15 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 131.2 MB in the beginning and 174.4 MB in the end (delta: -43.2 MB). Peak memory consumption was 226.7 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:48,958 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:57:48,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 155.2 MB. Free memory was 130.6 MB in the beginning and 121.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:48,960 INFO L168 Benchmark]: Boogie Preprocessor took 75.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:48,961 INFO L168 Benchmark]: RCFGBuilder took 715.57 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 106.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:48,961 INFO L168 Benchmark]: TraceAbstraction took 34085.96 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 105.7 MB in the beginning and 174.4 MB in the end (delta: -68.7 MB). Peak memory consumption was 201.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:57:48,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 155.2 MB. Free memory was 130.6 MB in the beginning and 121.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 715.57 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 106.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34085.96 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 105.7 MB in the beginning and 174.4 MB in the end (delta: -68.7 MB). Peak memory consumption was 201.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.1s, OverallIterations: 9, TraceHistogramMax: 27, AutomataDifference: 18.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 253 SDtfs, 438 SDslu, 421 SDs, 0 SdLazy, 3749 SolverSat, 1081 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1469 GetRequests, 1143 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 499 PreInvPairs, 1109 NumberOfFragments, 183 HoareAnnotationTreeSize, 499 FomulaSimplifications, 118992 FormulaSimplificationTreeSizeReduction, 3.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 8146 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 1783 NumberOfCodeBlocks, 1728 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1766 ConstructedInterpolants, 0 QuantifiedInterpolants, 481452 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2855 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 9783/11792 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...